Preserve dates when deserializing job message from Run Service (#3269)

* Preserve dates when deserializing job message from Run Service

* Preserve dates when deserializing job message from "Actions Run Service"

.devcontainer/devcontainer.json

@@ -4,13 +4,13 @@
   "features": {
     "ghcr.io/devcontainers/features/docker-in-docker:1": {},
     "ghcr.io/devcontainers/features/dotnet": {
-      "version": "6.0.418"
+      "version": "6.0.421"
     },
     "ghcr.io/devcontainers/features/node:1": {
       "version": "16"
     },
     "ghcr.io/devcontainers/features/sshd:1": {
-        "version": "latest"
+      "version": "latest"
     }
   },
   "customizations": {

images/Dockerfile

@@ -4,9 +4,9 @@ FROM mcr.microsoft.com/dotnet/runtime-deps:6.0-jammy as build
 ARG TARGETOS
 ARG TARGETARCH
 ARG RUNNER_VERSION
-ARG RUNNER_CONTAINER_HOOKS_VERSION=0.5.1
-ARG DOCKER_VERSION=25.0.2
-ARG BUILDX_VERSION=0.12.1
+ARG RUNNER_CONTAINER_HOOKS_VERSION=0.6.0
+ARG DOCKER_VERSION=25.0.4
+ARG BUILDX_VERSION=0.13.1
 
 RUN apt update -y && apt install curl unzip -y
 

releaseNote.md

@@ -1,30 +1,18 @@
 ## What's Changed
-* Bump docker and buildx to the latest version by @diogotorres97 in https://github.com/actions/runner/pull/3100
-* Revert "Bump container hook version to 0.5.0 in runner image (#3003)" by @TingluoHuang in https://github.com/actions/runner/pull/3101
-* Make embedded timeline record has same order as its parent record. by @TingluoHuang in https://github.com/actions/runner/pull/3113
-* Fix release workflow. by @TingluoHuang in https://github.com/actions/runner/pull/3102
-* Add user-agent to all http clients using RawClientHttpRequestSettings. by @TingluoHuang in https://github.com/actions/runner/pull/3115
-* Fix JobDispatcher crash during force cancellation. by @TingluoHuang in https://github.com/actions/runner/pull/3118
-* Implement Broker Redirects for Session and Messages by @luketomlinson in https://github.com/actions/runner/pull/3103
-* Only keep 1 older version runner around after self-upgrade. by @TingluoHuang in https://github.com/actions/runner/pull/3122
-* Upgrade `docker` from `24.0.7` to `24.0.8` by @MPV in https://github.com/actions/runner/pull/3124
-* Upload the diagnostic logs to the Results Service by @jtamsut in https://github.com/actions/runner/pull/3114
-* Upgrade `docker` from `24.0.8` to `24.0.9` by @MPV in https://github.com/actions/runner/pull/3126
-* Make sure to drain the upload queue before clean temp directory by @yacaovsnc in https://github.com/actions/runner/pull/3125
-* Specify `Content-Type` for BlockBlob upload by @bethanyj28 in https://github.com/actions/runner/pull/3119
-* Improve error report for invalid action.yml by @jsoref in https://github.com/actions/runner/pull/3106
-* Add sshd to .devcontainer.json by @pje in https://github.com/actions/runner/pull/3079
-* Resolve CVE-2024-21626 by @luka5 in https://github.com/actions/runner/pull/3123
-* Handle ForceTokenRefresh message by @luketomlinson in https://github.com/actions/runner/pull/3133
-* Bump hook version to 0.5.1 by @nikola-jokic in https://github.com/actions/runner/pull/3129
+* Load '_runnerSettings' in the early point of JobRunner.cs by @TingluoHuang in https://github.com/actions/runner/pull/3218
+* Add new SessionConflict return code by @eeSquared in https://github.com/actions/runner/pull/3215
+* backoff if we retried polling for more than 50 times in less than 30minutes by @aiqiaoy in https://github.com/actions/runner/pull/3232
+* Update dotnet sdk to latest version @6.0.421 by @github-actions in https://github.com/actions/runner/pull/3244
+* Cleanup enabled feature flags. by @TingluoHuang in https://github.com/actions/runner/pull/3246
+* Relax the condition to stop uploading to Results by @yacaovsnc in https://github.com/actions/runner/pull/3230
+* Cleanup enabled feature flags. by @TingluoHuang in https://github.com/actions/runner/pull/3248
+* Replace invalid file name chars in diag log name by @ericsciple in https://github.com/actions/runner/pull/3249
 
 ## New Contributors
-* @diogotorres97 made their first contribution in https://github.com/actions/runner/pull/3100
-* @MPV made their first contribution in https://github.com/actions/runner/pull/3124
-* @jtamsut made their first contribution in https://github.com/actions/runner/pull/3114
-* @luka5 made their first contribution in https://github.com/actions/runner/pull/3123
+* @eeSquared made their first contribution in https://github.com/actions/runner/pull/3215
+* @aiqiaoy made their first contribution in https://github.com/actions/runner/pull/3232
 
-**Full Changelog**: https://github.com/actions/runner/compare/v2.312.0...v2.313.0
+**Full Changelog**: https://github.com/actions/runner/compare/v2.315.0...v2.316.0
 
 _Note: Actions Runner follows a progressive release policy, so the latest release might not be available to your enterprise, organization, or repository yet.
 To confirm which version of the Actions Runner you should expect, please view the download instructions for your enterprise, organization, or repository.

src/Misc/layoutbin/RunnerService.js

@@ -114,6 +114,11 @@ var runService = function () {
             );
             stopping = true;
           }
+        } else if (code === 5) {
+          console.log(
+            "Runner listener exit with Session Conflict error, stop the service, no retry needed."
+          );
+          stopping = true;
         } else {
           var messagePrefix = "Runner listener exit with undefined return code";
           unknownFailureRetryCount++;

src/Misc/layoutroot/run-helper.cmd.template

@@ -49,5 +49,10 @@ if %ERRORLEVEL% EQU 4 (
   exit /b 1
 )
 
+if %ERRORLEVEL% EQU 5 (
+  echo "Runner listener exit with Session Conflict error, stop the service, no retry needed."
+  exit /b 0
+)
+
 echo "Exiting after unknown error code: %ERRORLEVEL%"
 exit /b 0

src/Misc/layoutroot/run-helper.sh.template

@@ -70,6 +70,9 @@ elif [[ $returnCode == 4 ]]; then
         "$DIR"/safe_sleep.sh 1
     done
     exit 2
+elif [[ $returnCode == 5 ]]; then
+    echo "Runner listener exit with Session Conflict error, stop the service, no retry needed."
+    exit 0
 else
     echo "Exiting with unknown error code: ${returnCode}"
     exit 0

src/Misc/layoutroot/run.sh

@@ -38,7 +38,7 @@ runWithManualTrap() {
         cp -f "$DIR"/run-helper.sh.template "$DIR"/run-helper.sh
         "$DIR"/run-helper.sh $* &
         PID=$!
-        wait -f $PID
+        wait $PID
         returnCode=$?
         if [[ $returnCode -eq 2 ]]; then
             echo "Restarting runner..."
@@ -84,4 +84,4 @@ if [[ -z "$RUNNER_MANUALLY_TRAP_SIG" ]]; then
     run $*
 else
     runWithManualTrap $*
-fi
+fi

src/Runner.Common/ActionsRunServer.cs

@@ -20,12 +20,12 @@ namespace GitHub.Runner.Common
     {
         private bool _hasConnection;
         private VssConnection _connection;
-        private TaskAgentHttpClient _taskAgentClient;
+        private ActionsRunServerHttpClient _actionsRunServerClient;
 
         public async Task ConnectAsync(Uri serverUrl, VssCredentials credentials)
         {
             _connection = await EstablishVssConnection(serverUrl, credentials, TimeSpan.FromSeconds(100));
-            _taskAgentClient = _connection.GetClient<TaskAgentHttpClient>();
+            _actionsRunServerClient = _connection.GetClient<ActionsRunServerHttpClient>();
             _hasConnection = true;
         }
 
@@ -42,7 +42,7 @@ namespace GitHub.Runner.Common
             CheckConnection();
             var jobMessage = RetryRequest<AgentJobRequestMessage>(async () =>
                                                     {
-                                                        return await _taskAgentClient.GetJobMessageAsync(id, cancellationToken);
+                                                        return await _actionsRunServerClient.GetJobMessageAsync(id, cancellationToken);
                                                     }, cancellationToken);
 
             return jobMessage;

src/Runner.Common/BrokerServer.cs

@@ -21,6 +21,10 @@ namespace GitHub.Runner.Common
         Task DeleteSessionAsync(CancellationToken cancellationToken);
 
         Task<TaskAgentMessage> GetRunnerMessageAsync(Guid? sessionId, TaskAgentStatus status, string version, string os, string architecture, bool disableUpdate, CancellationToken token);
+
+        Task UpdateConnectionIfNeeded(Uri serverUri, VssCredentials credentials);
+
+        Task ForceRefreshConnection(VssCredentials credentials);
     }
 
     public sealed class BrokerServer : RunnerService, IBrokerServer
@@ -59,7 +63,8 @@ namespace GitHub.Runner.Common
         {
             CheckConnection();
             var brokerSession = RetryRequest<TaskAgentMessage>(
-                async () => await _brokerHttpClient.GetRunnerMessageAsync(sessionId, version, status, os, architecture, disableUpdate, cancellationToken), cancellationToken);
+                async () => await _brokerHttpClient.GetRunnerMessageAsync(sessionId, version, status, os, architecture, disableUpdate, cancellationToken), cancellationToken, shouldRetry: ShouldRetryException);
+
 
             return brokerSession;
         }
@@ -69,5 +74,30 @@ namespace GitHub.Runner.Common
             CheckConnection();
             await _brokerHttpClient.DeleteSessionAsync(cancellationToken);
         }
+
+        public Task UpdateConnectionIfNeeded(Uri serverUri, VssCredentials credentials)
+        {
+            if (_brokerUri != serverUri || !_hasConnection)
+            {
+                return ConnectAsync(serverUri, credentials);
+            }
+
+            return Task.CompletedTask;
+        }
+
+        public Task ForceRefreshConnection(VssCredentials credentials)
+        {
+            return ConnectAsync(_brokerUri, credentials);
+        }
+
+        public bool ShouldRetryException(Exception ex)
+        {
+            if (ex is AccessDeniedException ade && ade.ErrorCode == 1)
+            {
+                return false;
+            }
+
+            return true;
+        }
     }
 }

src/Runner.Common/Constants.cs

@@ -153,6 +153,7 @@ namespace GitHub.Runner.Common
                 public const int RetryableError = 2;
                 public const int RunnerUpdating = 3;
                 public const int RunOnceRunnerUpdating = 4;
+                public const int SessionConflict = 5;
             }
 
             public static class Features
@@ -180,6 +181,9 @@ namespace GitHub.Runner.Common
             public static readonly string DeprecatedNodeVersion = "node16";
             public static readonly string EnforcedNode12DetectedAfterEndOfLife = "The following actions uses node12 which is deprecated and will be forced to run on node16: {0}. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/";
             public static readonly string EnforcedNode12DetectedAfterEndOfLifeEnvVariable = "Node16ForceActionsWarnings";
+            public static readonly string EnforcedNode16DetectedAfterEndOfLife = "The following actions uses Node.js version which is deprecated and will be forced to run on node20: {0}. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/";
+            public static readonly string EnforcedNode16DetectedAfterEndOfLifeEnvVariable = "Node20ForceActionsWarnings";
+
         }
 
         public static class RunnerEvent
@@ -251,6 +255,7 @@ namespace GitHub.Runner.Common
                 public static readonly string RunnerDebug = "ACTIONS_RUNNER_DEBUG";
                 public static readonly string StepDebug = "ACTIONS_STEP_DEBUG";
                 public static readonly string AllowActionsUseUnsecureNodeVersion = "ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION";
+                public static readonly string ManualForceActionsToNode20 = "FORCE_JAVASCRIPT_ACTIONS_TO_NODE20";
             }
 
             public static class Agent
@@ -262,6 +267,7 @@ namespace GitHub.Runner.Common
                 public static readonly string ForcedActionsNodeVersion = "ACTIONS_RUNNER_FORCE_ACTIONS_NODE_VERSION";
                 public static readonly string PrintLogToStdout = "ACTIONS_RUNNER_PRINT_LOG_TO_STDOUT";
                 public static readonly string ActionArchiveCacheDirectory = "ACTIONS_RUNNER_ACTION_ARCHIVE_CACHE";
+                public static readonly string ManualForceActionsToNode20 = "FORCE_JAVASCRIPT_ACTIONS_TO_NODE20";
             }
 
             public static class System

src/Runner.Common/JobServerQueue.cs

@@ -19,7 +19,7 @@ namespace GitHub.Runner.Common
         TaskCompletionSource<int> JobRecordUpdated { get; }
         event EventHandler<ThrottlingEventArgs> JobServerQueueThrottling;
         Task ShutdownAsync();
-        void Start(Pipelines.AgentJobRequestMessage jobRequest, bool resultsServiceOnly = false, bool enableTelemetry = false);
+        void Start(Pipelines.AgentJobRequestMessage jobRequest, bool resultsServiceOnly = false);
         void QueueWebConsoleLine(Guid stepRecordId, string line, long? lineNumber = null);
         void QueueFileUpload(Guid timelineId, Guid timelineRecordId, string type, string name, string path, bool deleteSource);
         void QueueResultsUpload(Guid timelineRecordId, string name, string path, string type, bool deleteSource, bool finalize, bool firstBlock, long totalLines);
@@ -74,6 +74,7 @@ namespace GitHub.Runner.Common
         private readonly List<JobTelemetry> _jobTelemetries = new();
         private bool _queueInProcess = false;
         private bool _resultsServiceOnly = false;
+        private int _resultsServiceExceptionsCount = 0;
         private Stopwatch _resultsUploadTimer = new();
         private Stopwatch _actionsUploadTimer = new();
 
@@ -104,11 +105,10 @@ namespace GitHub.Runner.Common
             _resultsServer = hostContext.GetService<IResultsServer>();
         }
 
-        public void Start(Pipelines.AgentJobRequestMessage jobRequest, bool resultsServiceOnly = false, bool enableTelemetry = false)
+        public void Start(Pipelines.AgentJobRequestMessage jobRequest, bool resultsServiceOnly = false)
         {
             Trace.Entering();
             _resultsServiceOnly = resultsServiceOnly;
-            _enableTelemetry = enableTelemetry;
 
             var serviceEndPoint = jobRequest.Resources.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
 
@@ -139,6 +139,12 @@ namespace GitHub.Runner.Common
                 _resultsClientInitiated = true;
             }
 
+            // Enable telemetry if we have both results service and actions service
+            if (_resultsClientInitiated && !_resultsServiceOnly)
+            {
+                _enableTelemetry = true;
+            }
+
             if (_queueInProcess)
             {
                 Trace.Info("No-opt, all queue process tasks are running.");
@@ -574,9 +580,9 @@ namespace GitHub.Runner.Common
                             Trace.Info("Catch exception during file upload to results, keep going since the process is best effort.");
                             Trace.Error(ex);
                             errorCount++;
-
+                            _resultsServiceExceptionsCount++;
                             // If we hit any exceptions uploading to Results, let's skip any additional uploads to Results unless Results is serving logs
-                            if (!_resultsServiceOnly)
+                            if (!_resultsServiceOnly && _resultsServiceExceptionsCount > 3)
                             {
                                 _resultsClientInitiated = false;
                                 SendResultsTelemetry(ex);

src/Runner.Common/RunServer.cs

@@ -5,6 +5,7 @@ using System.Threading.Tasks;
 using GitHub.Actions.RunService.WebApi;
 using GitHub.DistributedTask.Pipelines;
 using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Common.Util;
 using GitHub.Runner.Sdk;
 using GitHub.Services.Common;
 using Sdk.RSWebApi.Contracts;
@@ -60,7 +61,7 @@ namespace GitHub.Runner.Common
         {
             CheckConnection();
             return RetryRequest<AgentJobRequestMessage>(
-                async () => await _runServiceHttpClient.GetJobMessageAsync(requestUri, id, cancellationToken), cancellationToken,
+                async () => await _runServiceHttpClient.GetJobMessageAsync(requestUri, id, VarUtil.OS, cancellationToken), cancellationToken,
                 shouldRetry: ex => ex is not TaskOrchestrationJobAlreadyAcquiredException);
         }
 

src/Runner.Listener/BrokerMessageListener.cs

@@ -42,7 +42,7 @@ namespace GitHub.Runner.Listener
             _brokerServer = HostContext.GetService<IBrokerServer>();
         }
 
-        public async Task<Boolean> CreateSessionAsync(CancellationToken token)
+        public async Task<CreateSessionResult> CreateSessionAsync(CancellationToken token)
         {
             Trace.Entering();
 
@@ -99,7 +99,7 @@ namespace GitHub.Runner.Listener
                         encounteringError = false;
                     }
 
-                    return true;
+                    return CreateSessionResult.Success;
                 }
                 catch (OperationCanceledException) when (token.IsCancellationRequested)
                 {
@@ -123,7 +123,7 @@ namespace GitHub.Runner.Listener
                         if (string.Equals(vssOAuthEx.Error, "invalid_client", StringComparison.OrdinalIgnoreCase))
                         {
                             _term.WriteError("Failed to create a session. The runner registration has been deleted from the server, please re-configure. Runner registrations are automatically deleted for runners that have not connected to the service recently.");
-                            return false;
+                            return CreateSessionResult.Failure;
                         }
 
                         // Check whether we get 401 because the runner registration already removed by the service.
@@ -134,14 +134,18 @@ namespace GitHub.Runner.Listener
                         if (string.Equals(authError, "invalid_client", StringComparison.OrdinalIgnoreCase))
                         {
                             _term.WriteError("Failed to create a session. The runner registration has been deleted from the server, please re-configure. Runner registrations are automatically deleted for runners that have not connected to the service recently.");
-                            return false;
+                            return CreateSessionResult.Failure;
                         }
                     }
 
                     if (!IsSessionCreationExceptionRetriable(ex))
                     {
                         _term.WriteError($"Failed to create session. {ex.Message}");
-                        return false;
+                        if (ex is TaskAgentSessionConflictException)
+                        {
+                            return CreateSessionResult.SessionConflict;
+                        }
+                        return CreateSessionResult.Failure;
                     }
 
                     if (!encounteringError) //print the message only on the first error

src/Runner.Listener/JobDispatcher.cs

@@ -35,7 +35,7 @@ namespace GitHub.Runner.Listener
     // This implementation of IJobDispatcher is not thread safe.
     // It is based on the fact that the current design of the runner is a dequeue
     // and processes one message from the message queue at a time.
-    // In addition, it only executes one job every time, 
+    // In addition, it only executes one job every time,
     // and the server will not send another job while this one is still running.
     public sealed class JobDispatcher : RunnerService, IJobDispatcher
     {
@@ -546,13 +546,27 @@ namespace GitHub.Runner.Listener
                                     Trace.Info($"Return code {returnCode} indicate worker encounter an unhandled exception or app crash, attach worker stdout/stderr to JobRequest result.");
 
                                     var jobServer = await InitializeJobServerAsync(systemConnection);
-                                    await LogWorkerProcessUnhandledException(jobServer, message, detailInfo);
-
-                                    // Go ahead to finish the job with result 'Failed' if the STDERR from worker is System.IO.IOException, since it typically means we are running out of disk space.
-                                    if (detailInfo.Contains(typeof(System.IO.IOException).ToString(), StringComparison.OrdinalIgnoreCase))
+                                    var unhandledExceptionIssue = new Issue() { Type = IssueType.Error, Message = detailInfo };
+                                    unhandledExceptionIssue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.WorkerCrash;
+                                    switch (jobServer)
                                     {
-                                        Trace.Info($"Finish job with result 'Failed' due to IOException.");
-                                        await ForceFailJob(jobServer, message, detailInfo);
+                                        case IJobServer js:
+                                            {
+                                                await LogWorkerProcessUnhandledException(js, message, unhandledExceptionIssue);
+                                                // Go ahead to finish the job with result 'Failed' if the STDERR from worker is System.IO.IOException, since it typically means we are running out of disk space.
+                                                if (detailInfo.Contains(typeof(System.IO.IOException).ToString(), StringComparison.OrdinalIgnoreCase))
+                                                {
+                                                    Trace.Info($"Finish job with result 'Failed' due to IOException.");
+                                                    await ForceFailJob(js, message);
+                                                }
+
+                                                break;
+                                            }
+                                        case IRunServer rs:
+                                            await ForceFailJob(rs, message, unhandledExceptionIssue);
+                                            break;
+                                        default:
+                                            throw new NotSupportedException($"JobServer type '{jobServer.GetType().Name}' is not supported.");
                                     }
                                 }
 
@@ -644,7 +658,7 @@ namespace GitHub.Runner.Listener
                                 }
                             }
 
-                            // wait worker to exit 
+                            // wait worker to exit
                             // if worker doesn't exit within timeout, then kill worker.
                             completedTask = await Task.WhenAny(workerProcessTask, Task.Delay(-1, workerCancelTimeoutKillToken));
 
@@ -1131,86 +1145,65 @@ namespace GitHub.Runner.Listener
         }
 
         // log an error issue to job level timeline record
-        private async Task LogWorkerProcessUnhandledException(IRunnerService server, Pipelines.AgentJobRequestMessage message, string detailInfo)
+        private async Task LogWorkerProcessUnhandledException(IJobServer jobServer, Pipelines.AgentJobRequestMessage message, Issue issue)
         {
-            if (server is IJobServer jobServer)
+            try
             {
-                try
-                {
-                    var timeline = await jobServer.GetTimelineAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, CancellationToken.None);
-                    ArgUtil.NotNull(timeline, nameof(timeline));
+                var timeline = await jobServer.GetTimelineAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, CancellationToken.None);
+                ArgUtil.NotNull(timeline, nameof(timeline));
 
-                    TimelineRecord jobRecord = timeline.Records.FirstOrDefault(x => x.Id == message.JobId && x.RecordType == "Job");
-                    ArgUtil.NotNull(jobRecord, nameof(jobRecord));
+                TimelineRecord jobRecord = timeline.Records.FirstOrDefault(x => x.Id == message.JobId && x.RecordType == "Job");
+                ArgUtil.NotNull(jobRecord, nameof(jobRecord));
 
-                    var unhandledExceptionIssue = new Issue() { Type = IssueType.Error, Message = detailInfo };
-                    unhandledExceptionIssue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.WorkerCrash;
-                    jobRecord.ErrorCount++;
-                    jobRecord.Issues.Add(unhandledExceptionIssue);
+                jobRecord.ErrorCount++;
+                jobRecord.Issues.Add(issue);
 
-                    if (message.Variables.TryGetValue("DistributedTask.MarkJobAsFailedOnWorkerCrash", out var markJobAsFailedOnWorkerCrash) &&
-                        StringUtil.ConvertToBoolean(markJobAsFailedOnWorkerCrash?.Value))
-                    {
-                        Trace.Info("Mark the job as failed since the worker crashed");
-                        jobRecord.Result = TaskResult.Failed;
-                        // mark the job as completed so service will pickup the result
-                        jobRecord.State = TimelineRecordState.Completed;
-                    }
+                Trace.Info("Mark the job as failed since the worker crashed");
+                jobRecord.Result = TaskResult.Failed;
+                // mark the job as completed so service will pickup the result
+                jobRecord.State = TimelineRecordState.Completed;
 
-                    await jobServer.UpdateTimelineRecordsAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, new TimelineRecord[] { jobRecord }, CancellationToken.None);
-                }
-                catch (Exception ex)
-                {
-                    Trace.Error("Fail to report unhandled exception from Runner.Worker process");
-                    Trace.Error(ex);
-                }
+                await jobServer.UpdateTimelineRecordsAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, new TimelineRecord[] { jobRecord }, CancellationToken.None);
             }
-            else
+            catch (Exception ex)
             {
-                Trace.Info("Job server does not support handling unhandled exception yet, error message: {0}", detailInfo);
-                return;
+                Trace.Error("Fail to report unhandled exception from Runner.Worker process");
+                Trace.Error(ex);
             }
         }
 
         // raise job completed event to fail the job.
-        private async Task ForceFailJob(IRunnerService server, Pipelines.AgentJobRequestMessage message, string detailInfo)
+        private async Task ForceFailJob(IJobServer jobServer, Pipelines.AgentJobRequestMessage message)
         {
-            if (server is IJobServer jobServer)
+            try
             {
-                try
-                {
-                    var jobCompletedEvent = new JobCompletedEvent(message.RequestId, message.JobId, TaskResult.Failed);
-                    await jobServer.RaisePlanEventAsync<JobCompletedEvent>(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, jobCompletedEvent, CancellationToken.None);
-                }
-                catch (Exception ex)
-                {
-                    Trace.Error("Fail to raise JobCompletedEvent back to service.");
-                    Trace.Error(ex);
-                }
+                var jobCompletedEvent = new JobCompletedEvent(message.RequestId, message.JobId, TaskResult.Failed);
+                await jobServer.RaisePlanEventAsync<JobCompletedEvent>(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, jobCompletedEvent, CancellationToken.None);
             }
-            else if (server is IRunServer runServer)
+            catch (Exception ex)
             {
-                try
-                {
-                    var unhandledExceptionIssue = new Issue() { Type = IssueType.Error, Message = detailInfo };
-                    var unhandledAnnotation = unhandledExceptionIssue.ToAnnotation();
-                    var jobAnnotations = new List<Annotation>();
-                    if (unhandledAnnotation.HasValue)
-                    {
-                        jobAnnotations.Add(unhandledAnnotation.Value);
-                    }
+                Trace.Error("Fail to raise JobCompletedEvent back to service.");
+                Trace.Error(ex);
+            }
+        }
 
-                    await runServer.CompleteJobAsync(message.Plan.PlanId, message.JobId, TaskResult.Failed, outputs: null, stepResults: null, jobAnnotations: jobAnnotations, environmentUrl: null, CancellationToken.None);
-                }
-                catch (Exception ex)
-                {
-                    Trace.Error("Fail to raise job completion back to service.");
-                    Trace.Error(ex);
-                }
-            }
-            else
+        private async Task ForceFailJob(IRunServer runServer, Pipelines.AgentJobRequestMessage message, Issue issue)
+        {
+            try
             {
-                throw new NotSupportedException($"Server type {server.GetType().FullName} is not supported.");
+                var annotation = issue.ToAnnotation();
+                var jobAnnotations = new List<Annotation>();
+                if (annotation.HasValue)
+                {
+                    jobAnnotations.Add(annotation.Value);
+                }
+
+                await runServer.CompleteJobAsync(message.Plan.PlanId, message.JobId, TaskResult.Failed, outputs: null, stepResults: null, jobAnnotations: jobAnnotations, environmentUrl: null, CancellationToken.None);
+            }
+            catch (Exception ex)
+            {
+                Trace.Error("Fail to raise job completion back to service.");
+                Trace.Error(ex);
             }
         }
 

src/Runner.Listener/MessageListener.cs

@@ -18,10 +18,17 @@ using GitHub.Services.WebApi;
 
 namespace GitHub.Runner.Listener
 {
+    public enum CreateSessionResult
+    {
+        Success,
+        Failure,
+        SessionConflict
+    }
+
     [ServiceLocator(Default = typeof(MessageListener))]
     public interface IMessageListener : IRunnerService
     {
-        Task<Boolean> CreateSessionAsync(CancellationToken token);
+        Task<CreateSessionResult> CreateSessionAsync(CancellationToken token);
         Task DeleteSessionAsync();
         Task<TaskAgentMessage> GetNextMessageAsync(CancellationToken token);
         Task DeleteMessageAsync(TaskAgentMessage message);
@@ -59,7 +66,7 @@ namespace GitHub.Runner.Listener
             _brokerServer = hostContext.GetService<IBrokerServer>();
         }
 
-        public async Task<Boolean> CreateSessionAsync(CancellationToken token)
+        public async Task<CreateSessionResult> CreateSessionAsync(CancellationToken token)
         {
             Trace.Entering();
 
@@ -109,7 +116,8 @@ namespace GitHub.Runner.Listener
                     if (_session.BrokerMigrationMessage != null)
                     {
                         Trace.Info("Runner session is in migration mode: Creating Broker session with BrokerBaseUrl: {0}", _session.BrokerMigrationMessage.BrokerBaseUrl);
-                        await _brokerServer.ConnectAsync(_session.BrokerMigrationMessage.BrokerBaseUrl, _creds);
+
+                        await _brokerServer.UpdateConnectionIfNeeded(_session.BrokerMigrationMessage.BrokerBaseUrl, _creds);
                         _session = await _brokerServer.CreateSessionAsync(taskAgentSession, token);
                         _isBrokerSession = true;
                     }
@@ -122,7 +130,7 @@ namespace GitHub.Runner.Listener
                         encounteringError = false;
                     }
 
-                    return true;
+                    return CreateSessionResult.Success;
                 }
                 catch (OperationCanceledException) when (token.IsCancellationRequested)
                 {
@@ -146,7 +154,7 @@ namespace GitHub.Runner.Listener
                         if (string.Equals(vssOAuthEx.Error, "invalid_client", StringComparison.OrdinalIgnoreCase))
                         {
                             _term.WriteError("Failed to create a session. The runner registration has been deleted from the server, please re-configure. Runner registrations are automatically deleted for runners that have not connected to the service recently.");
-                            return false;
+                            return CreateSessionResult.Failure;
                         }
 
                         // Check whether we get 401 because the runner registration already removed by the service.
@@ -157,14 +165,18 @@ namespace GitHub.Runner.Listener
                         if (string.Equals(authError, "invalid_client", StringComparison.OrdinalIgnoreCase))
                         {
                             _term.WriteError("Failed to create a session. The runner registration has been deleted from the server, please re-configure. Runner registrations are automatically deleted for runners that have not connected to the service recently.");
-                            return false;
+                            return CreateSessionResult.Failure;
                         }
                     }
 
                     if (!IsSessionCreationExceptionRetriable(ex))
                     {
                         _term.WriteError($"Failed to create session. {ex.Message}");
-                        return false;
+                        if (ex is TaskAgentSessionConflictException)
+                        {
+                            return CreateSessionResult.SessionConflict;
+                        }
+                        return CreateSessionResult.Failure;
                     }
 
                     if (!encounteringError) //print the message only on the first error
@@ -187,12 +199,12 @@ namespace GitHub.Runner.Listener
                 {
                     using (var ts = new CancellationTokenSource(TimeSpan.FromSeconds(30)))
                     {
+                        await _runnerServer.DeleteAgentSessionAsync(_settings.PoolId, _session.SessionId, ts.Token);
+
                         if (_isBrokerSession)
                         {
                             await _brokerServer.DeleteSessionAsync(ts.Token);
-                            return;
                         }
-                        await _runnerServer.DeleteAgentSessionAsync(_settings.PoolId, _session.SessionId, ts.Token);
                     }
                 }
                 else
@@ -204,19 +216,17 @@ namespace GitHub.Runner.Listener
 
         public void OnJobStatus(object sender, JobStatusEventArgs e)
         {
-            if (StringUtil.ConvertToBoolean(Environment.GetEnvironmentVariable("USE_BROKER_FLOW")))
+            Trace.Info("Received job status event. JobState: {0}", e.Status);
+            runnerStatus = e.Status;
+            try
             {
-                Trace.Info("Received job status event. JobState: {0}", e.Status);
-                runnerStatus = e.Status;
-                try
-                {
-                    _getMessagesTokenSource?.Cancel();
-                }
-                catch (ObjectDisposedException)
-                {
-                    Trace.Info("_getMessagesTokenSource is already disposed.");
-                }
+                _getMessagesTokenSource?.Cancel();
             }
+            catch (ObjectDisposedException)
+            {
+                Trace.Info("_getMessagesTokenSource is already disposed.");
+            }
+
         }
 
         public async Task<TaskAgentMessage> GetNextMessageAsync(CancellationToken token)
@@ -226,6 +236,7 @@ namespace GitHub.Runner.Listener
             ArgUtil.NotNull(_settings, nameof(_settings));
             bool encounteringError = false;
             int continuousError = 0;
+            int continuousEmptyMessage = 0;
             string errorMessage = string.Empty;
             Stopwatch heartbeat = new();
             heartbeat.Restart();
@@ -256,7 +267,7 @@ namespace GitHub.Runner.Listener
 
                         var migrationMessage = JsonUtility.FromString<BrokerMigrationMessage>(message.Body);
 
-                        await _brokerServer.ConnectAsync(migrationMessage.BrokerBaseUrl, _creds);
+                        await _brokerServer.UpdateConnectionIfNeeded(migrationMessage.BrokerBaseUrl, _creds);
                         message = await _brokerServer.GetRunnerMessageAsync(_session.SessionId,
                                                                         runnerStatus,
                                                                         BuildConstants.RunnerPackage.Version,
@@ -304,7 +315,7 @@ namespace GitHub.Runner.Listener
                     Trace.Error(ex);
 
                     // don't retry if SkipSessionRecover = true, DT service will delete agent session to stop agent from taking more jobs.
-                    if (ex is TaskAgentSessionExpiredException && !_settings.SkipSessionRecover && await CreateSessionAsync(token))
+                    if (ex is TaskAgentSessionExpiredException && !_settings.SkipSessionRecover && (await CreateSessionAsync(token) == CreateSessionResult.Success))
                     {
                         Trace.Info($"{nameof(TaskAgentSessionExpiredException)} received, recovered by recreate session.");
                     }
@@ -349,16 +360,27 @@ namespace GitHub.Runner.Listener
 
                 if (message == null)
                 {
+                    continuousEmptyMessage++;
                     if (heartbeat.Elapsed > TimeSpan.FromMinutes(30))
                     {
                         Trace.Info($"No message retrieved from session '{_session.SessionId}' within last 30 minutes.");
                         heartbeat.Restart();
+                        continuousEmptyMessage = 0;
                     }
                     else
                     {
                         Trace.Verbose($"No message retrieved from session '{_session.SessionId}'.");
                     }
 
+                    if (continuousEmptyMessage > 50)
+                    {
+                        // retried more than 50 times in less than 30mins and still getting empty message
+                        // something is not right on the service side, backoff for 15-30s before retry
+                        _getNextMessageRetryInterval = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(15), TimeSpan.FromSeconds(30), _getNextMessageRetryInterval);
+                        Trace.Info("Sleeping for {0} seconds before retrying.", _getNextMessageRetryInterval.TotalSeconds);
+                        await HostContext.Delay(_getNextMessageRetryInterval, token);
+                    }
+
                     continue;
                 }
 
@@ -384,6 +406,7 @@ namespace GitHub.Runner.Listener
         public async Task RefreshListenerTokenAsync(CancellationToken cancellationToken)
         {
             await _runnerServer.RefreshConnectionAsync(RunnerConnectionType.MessageQueue, TimeSpan.FromSeconds(60));
+            await _brokerServer.ForceRefreshConnection(_creds);
         }
 
         private TaskAgentMessage DecryptMessage(TaskAgentMessage message)

src/Runner.Listener/Runner.cs

@@ -359,7 +359,12 @@ namespace GitHub.Runner.Listener
             {
                 Trace.Info(nameof(RunAsync));
                 _listener = GetMesageListener(settings);
-                if (!await _listener.CreateSessionAsync(HostContext.RunnerShutdownToken))
+                CreateSessionResult createSessionResult = await _listener.CreateSessionAsync(HostContext.RunnerShutdownToken);
+                if (createSessionResult == CreateSessionResult.SessionConflict)
+                {
+                    return Constants.Runner.ReturnCode.SessionConflict;
+                }
+                else if (createSessionResult == CreateSessionResult.Failure)
                 {
                     return Constants.Runner.ReturnCode.TerminatedError;
                 }
@@ -567,6 +572,11 @@ namespace GitHub.Runner.Listener
                                             Trace.Info("Job is already acquired, skip this message.");
                                             continue;
                                         }
+                                        catch (Exception ex)
+                                        {
+                                            Trace.Error($"Caught exception from acquiring job message: {ex}");
+                                            continue;
+                                        }
                                     }
 
                                     jobDispatcher.Run(jobRequestMessage, runOnce);
@@ -598,6 +608,7 @@ namespace GitHub.Runner.Listener
                             }
                             else if (string.Equals(message.MessageType, TaskAgentMessageTypes.ForceTokenRefresh))
                             {
+                                Trace.Info("Received ForceTokenRefreshMessage");
                                 await _listener.RefreshListenerTokenAsync(messageQueueLoopTokenSource.Token);
                             }
                             else

src/Runner.Sdk/Util/IOUtil.cs

@@ -459,6 +459,34 @@ namespace GitHub.Runner.Sdk
             File.WriteAllText(path, null);
         }
 
+        /// <summary>
+        /// Replaces invalid file name characters with '_'
+        /// </summary>
+        public static string ReplaceInvalidFileNameChars(string fileName)
+        {
+            var result = new StringBuilder();
+            var invalidChars = Path.GetInvalidFileNameChars();
+
+            var current = 0; // Current index
+            while (current < fileName?.Length)
+            {
+                var next = fileName.IndexOfAny(invalidChars, current);
+                if (next >= 0)
+                {
+                    result.Append(fileName.Substring(current, next - current));
+                    result.Append('_');
+                    current = next + 1;
+                }
+                else
+                {
+                    result.Append(fileName.Substring(current));
+                    break;
+                }
+            }
+
+            return result.ToString();
+        }
+
         /// <summary>
         /// Recursively enumerates a directory without following directory reparse points.
         /// </summary>

src/Runner.Sdk/Util/VssUtil.cs

@@ -85,11 +85,6 @@ namespace GitHub.Runner.Sdk
                 settings.SendTimeout = TimeSpan.FromSeconds(Math.Min(Math.Max(httpRequestTimeoutSeconds, 100), 1200));
             }
 
-            if (StringUtil.ConvertToBoolean(Environment.GetEnvironmentVariable("USE_BROKER_FLOW")))
-            {
-                settings.AllowAutoRedirectForBroker = true;
-            }
-
             // Remove Invariant from the list of accepted languages.
             //
             // The constructor of VssHttpRequestSettings (base class of VssClientHttpRequestSettings) adds the current

src/Runner.Sdk/Util/WhichUtil.cs

@@ -7,129 +7,6 @@ namespace GitHub.Runner.Sdk
     public static class WhichUtil
     {
         public static string Which(string command, bool require = false, ITraceWriter trace = null, string prependPath = null)
-        {
-            ArgUtil.NotNullOrEmpty(command, nameof(command));
-            trace?.Info($"Which: '{command}'");
-            if (Path.IsPathFullyQualified(command) && File.Exists(command))
-            {
-                trace?.Info($"Fully qualified path: '{command}'");
-                return command;
-            }
-            string path = Environment.GetEnvironmentVariable(PathUtil.PathVariable);
-            if (string.IsNullOrEmpty(path))
-            {
-                trace?.Info("PATH environment variable not defined.");
-                path = path ?? string.Empty;
-            }
-            if (!string.IsNullOrEmpty(prependPath))
-            {
-                path = PathUtil.PrependPath(prependPath, path);
-            }
-
-            string[] pathSegments = path.Split(new Char[] { Path.PathSeparator }, StringSplitOptions.RemoveEmptyEntries);
-            for (int i = 0; i < pathSegments.Length; i++)
-            {
-                pathSegments[i] = Environment.ExpandEnvironmentVariables(pathSegments[i]);
-            }
-
-            foreach (string pathSegment in pathSegments)
-            {
-                if (!string.IsNullOrEmpty(pathSegment) && Directory.Exists(pathSegment))
-                {
-                    string[] matches = null;
-#if OS_WINDOWS
-                    string pathExt = Environment.GetEnvironmentVariable("PATHEXT");
-                    if (string.IsNullOrEmpty(pathExt))
-                    {
-                        // XP's system default value for PATHEXT system variable
-                        pathExt = ".com;.exe;.bat;.cmd;.vbs;.vbe;.js;.jse;.wsf;.wsh";
-                    }
-
-                    string[] pathExtSegments = pathExt.Split(new string[] { ";" }, StringSplitOptions.RemoveEmptyEntries);
-
-                    // if command already has an extension.
-                    if (pathExtSegments.Any(ext => command.EndsWith(ext, StringComparison.OrdinalIgnoreCase)))
-                    {
-                        try
-                        {
-                            matches = Directory.GetFiles(pathSegment, command);
-                        }
-                        catch (UnauthorizedAccessException ex)
-                        {
-                            trace?.Info("Ignore UnauthorizedAccess exception during Which.");
-                            trace?.Verbose(ex.ToString());
-                        }
-
-                        if (matches != null && matches.Length > 0 && IsPathValid(matches.First(), trace))
-                        {
-                            trace?.Info($"Location: '{matches.First()}'");
-                            return matches.First();
-                        }
-                    }
-                    else
-                    {
-                        string searchPattern;
-                        searchPattern = StringUtil.Format($"{command}.*");
-                        try
-                        {
-                            matches = Directory.GetFiles(pathSegment, searchPattern);
-                        }
-                        catch (UnauthorizedAccessException ex)
-                        {
-                            trace?.Info("Ignore UnauthorizedAccess exception during Which.");
-                            trace?.Verbose(ex.ToString());
-                        }
-
-                        if (matches != null && matches.Length > 0)
-                        {
-                            // add extension.
-                            for (int i = 0; i < pathExtSegments.Length; i++)
-                            {
-                                string fullPath = Path.Combine(pathSegment, $"{command}{pathExtSegments[i]}");
-                                if (matches.Any(p => p.Equals(fullPath, StringComparison.OrdinalIgnoreCase)) && IsPathValid(fullPath, trace))
-                                {
-                                    trace?.Info($"Location: '{fullPath}'");
-                                    return fullPath;
-                                }
-                            }
-                        }
-                    }
-#else
-                    try
-                    {
-                        matches = Directory.GetFiles(pathSegment, command);
-                    }
-                    catch (UnauthorizedAccessException ex)
-                    {
-                        trace?.Info("Ignore UnauthorizedAccess exception during Which.");
-                        trace?.Verbose(ex.ToString());
-                    }
-
-                    if (matches != null && matches.Length > 0 && IsPathValid(matches.First(), trace))
-                    {
-                        trace?.Info($"Location: '{matches.First()}'");
-                        return matches.First();
-                    }
-#endif
-                }
-            }
-
-#if OS_WINDOWS
-            trace?.Info($"{command}: command not found. Make sure '{command}' is installed and its location included in the 'Path' environment variable.");
-#else
-            trace?.Info($"{command}: command not found. Make sure '{command}' is installed and its location included in the 'PATH' environment variable.");
-#endif
-            if (require)
-            {
-                throw new FileNotFoundException(
-                    message: $"{command}: command not found",
-                    fileName: command);
-            }
-
-            return null;
-        }
-
-        public static string Which2(string command, bool require = false, ITraceWriter trace = null, string prependPath = null)
         {
             ArgUtil.NotNullOrEmpty(command, nameof(command));
             trace?.Info($"Which2: '{command}'");

src/Runner.Worker/ActionManager.cs

@@ -483,10 +483,6 @@ namespace GitHub.Runner.Worker
                             {
                                 // Load stored Ids for later load actions
                                 compositeAction.Steps[i].Id = _cachedEmbeddedStepIds[action.Id][i];
-                                if (string.IsNullOrEmpty(executionContext.Global.Variables.Get("DistributedTask.EnableCompositeActions")) && compositeAction.Steps[i].Reference.Type != Pipelines.ActionSourceType.Script)
-                                {
-                                    throw new Exception("`uses:` keyword is not currently supported.");
-                                }
                             }
                         }
                         else
@@ -703,11 +699,12 @@ namespace GitHub.Runner.Worker
                 catch (Exception ex) when (!executionContext.CancellationToken.IsCancellationRequested) // Do not retry if the run is cancelled.
                 {
                     // UnresolvableActionDownloadInfoException is a 422 client error, don't retry
+                    // NonRetryableActionDownloadInfoException is an non-retryable exception from Actions
                     // Some possible cases are:
                     // * Repo is rate limited
                     // * Repo or tag doesn't exist, or isn't public
                     // * Policy validation failed
-                    if (attempt < 3 && !(ex is WebApi.UnresolvableActionDownloadInfoException))
+                    if (attempt < 3 && !(ex is WebApi.UnresolvableActionDownloadInfoException) && !(ex is WebApi.NonRetryableActionDownloadInfoException))
                     {
                         executionContext.Output($"Failed to resolve action download info. Error: {ex.Message}");
                         executionContext.Debug(ex.ToString());
@@ -796,43 +793,40 @@ namespace GitHub.Runner.Worker
             try
             {
                 var useActionArchiveCache = false;
-                if (executionContext.Global.Variables.GetBoolean("DistributedTask.UseActionArchiveCache") == true)
+                var hasActionArchiveCache = false;
+                var actionArchiveCacheDir = Environment.GetEnvironmentVariable(Constants.Variables.Agent.ActionArchiveCacheDirectory);
+                if (!string.IsNullOrEmpty(actionArchiveCacheDir) &&
+                    Directory.Exists(actionArchiveCacheDir))
                 {
-                    var hasActionArchiveCache = false;
-                    var actionArchiveCacheDir = Environment.GetEnvironmentVariable(Constants.Variables.Agent.ActionArchiveCacheDirectory);
-                    if (!string.IsNullOrEmpty(actionArchiveCacheDir) &&
-                        Directory.Exists(actionArchiveCacheDir))
-                    {
-                        hasActionArchiveCache = true;
-                        Trace.Info($"Check if action archive '{downloadInfo.ResolvedNameWithOwner}@{downloadInfo.ResolvedSha}' already exists in cache directory '{actionArchiveCacheDir}'");
+                    hasActionArchiveCache = true;
+                    Trace.Info($"Check if action archive '{downloadInfo.ResolvedNameWithOwner}@{downloadInfo.ResolvedSha}' already exists in cache directory '{actionArchiveCacheDir}'");
 #if OS_WINDOWS
-                        var cacheArchiveFile = Path.Combine(actionArchiveCacheDir, downloadInfo.ResolvedNameWithOwner.Replace(Path.DirectorySeparatorChar, '_').Replace(Path.AltDirectorySeparatorChar, '_'), $"{downloadInfo.ResolvedSha}.zip");
+                    var cacheArchiveFile = Path.Combine(actionArchiveCacheDir, downloadInfo.ResolvedNameWithOwner.Replace(Path.DirectorySeparatorChar, '_').Replace(Path.AltDirectorySeparatorChar, '_'), $"{downloadInfo.ResolvedSha}.zip");
 #else
-                        var cacheArchiveFile = Path.Combine(actionArchiveCacheDir, downloadInfo.ResolvedNameWithOwner.Replace(Path.DirectorySeparatorChar, '_').Replace(Path.AltDirectorySeparatorChar, '_'), $"{downloadInfo.ResolvedSha}.tar.gz");
+                    var cacheArchiveFile = Path.Combine(actionArchiveCacheDir, downloadInfo.ResolvedNameWithOwner.Replace(Path.DirectorySeparatorChar, '_').Replace(Path.AltDirectorySeparatorChar, '_'), $"{downloadInfo.ResolvedSha}.tar.gz");
 #endif
-                        if (File.Exists(cacheArchiveFile))
+                    if (File.Exists(cacheArchiveFile))
+                    {
+                        try
                         {
-                            try
-                            {
-                                Trace.Info($"Found action archive '{cacheArchiveFile}' in cache directory '{actionArchiveCacheDir}'");
-                                File.Copy(cacheArchiveFile, archiveFile);
-                                useActionArchiveCache = true;
-                                executionContext.Debug($"Copied action archive '{cacheArchiveFile}' to '{archiveFile}'");
-                            }
-                            catch (Exception ex)
-                            {
-                                Trace.Error($"Failed to copy action archive '{cacheArchiveFile}' to '{archiveFile}'. Error: {ex}");
-                            }
+                            Trace.Info($"Found action archive '{cacheArchiveFile}' in cache directory '{actionArchiveCacheDir}'");
+                            File.Copy(cacheArchiveFile, archiveFile);
+                            useActionArchiveCache = true;
+                            executionContext.Debug($"Copied action archive '{cacheArchiveFile}' to '{archiveFile}'");
+                        }
+                        catch (Exception ex)
+                        {
+                            Trace.Error($"Failed to copy action archive '{cacheArchiveFile}' to '{archiveFile}'. Error: {ex}");
                         }
                     }
-
-                    executionContext.Global.JobTelemetry.Add(new JobTelemetry()
-                    {
-                        Type = JobTelemetryType.General,
-                        Message = $"Action archive cache usage: {downloadInfo.ResolvedNameWithOwner}@{downloadInfo.ResolvedSha} use cache {useActionArchiveCache} has cache {hasActionArchiveCache}"
-                    });
                 }
 
+                executionContext.Global.JobTelemetry.Add(new JobTelemetry()
+                {
+                    Type = JobTelemetryType.General,
+                    Message = $"Action archive cache usage: {downloadInfo.ResolvedNameWithOwner}@{downloadInfo.ResolvedSha} use cache {useActionArchiveCache} has cache {hasActionArchiveCache}"
+                });
+
                 if (!useActionArchiveCache)
                 {
                     await DownloadRepositoryArchive(executionContext, link, downloadInfo.Authentication?.Token, archiveFile);
@@ -878,16 +872,9 @@ namespace GitHub.Runner.Worker
                     int exitCode = await processInvoker.ExecuteAsync(stagingDirectory, tar, $"-xzf \"{archiveFile}\"", null, executionContext.CancellationToken);
                     if (exitCode != 0)
                     {
-                        if (executionContext.Global.Variables.GetBoolean("DistributedTask.DetailUntarFailure") == true)
-                        {
-                            var fileInfo = new FileInfo(archiveFile);
-                            var sha256hash = await IOUtil.GetFileContentSha256HashAsync(archiveFile);
-                            throw new InvalidActionArchiveException($"Can't use 'tar -xzf' extract archive file: {archiveFile} (SHA256 '{sha256hash}', size '{fileInfo.Length}' bytes, tar outputs '{string.Join(' ', tarOutputs)}'). Action being checked out: {downloadInfo.NameWithOwner}@{downloadInfo.Ref}. return code: {exitCode}.");
-                        }
-                        else
-                        {
-                            throw new InvalidActionArchiveException($"Can't use 'tar -xzf' extract archive file: {archiveFile}. Action being checked out: {downloadInfo.NameWithOwner}@{downloadInfo.Ref}. return code: {exitCode}.");
-                        }
+                        var fileInfo = new FileInfo(archiveFile);
+                        var sha256hash = await IOUtil.GetFileContentSha256HashAsync(archiveFile);
+                        throw new InvalidActionArchiveException($"Can't use 'tar -xzf' extract archive file: {archiveFile} (SHA256 '{sha256hash}', size '{fileInfo.Length}' bytes, tar outputs '{string.Join(' ', tarOutputs)}'). Action being checked out: {downloadInfo.NameWithOwner}@{downloadInfo.Ref}. return code: {exitCode}.");
                     }
                 }
 #endif
@@ -1031,13 +1018,6 @@ namespace GitHub.Runner.Worker
                         }
                     }
 
-                    foreach (var step in compositeAction.Steps)
-                    {
-                        if (string.IsNullOrEmpty(executionContext.Global.Variables.Get("DistributedTask.EnableCompositeActions")) && step.Reference.Type != Pipelines.ActionSourceType.Script)
-                        {
-                            throw new Exception("`uses:` keyword is not currently supported.");
-                        }
-                    }
                     return setupInfo;
                 }
                 else

src/Runner.Worker/ContainerOperationProvider.cs

@@ -466,17 +466,39 @@ namespace GitHub.Runner.Worker
             {
                 throw new InvalidOperationException($"Failed to create directory to store registry client credentials: {e.Message}");
             }
-            var loginExitCode = await _dockerManager.DockerLogin(
-                executionContext,
-                configLocation,
-                container.RegistryServer,
-                container.RegistryAuthUsername,
-                container.RegistryAuthPassword);
 
-            if (loginExitCode != 0)
+            // Login docker with retry up to 3 times
+            int retryCount = 0;
+            int loginExitCode = 0;
+            while (retryCount < 3)
+            {
+                loginExitCode = await _dockerManager.DockerLogin(
+                    executionContext,
+                    configLocation,
+                    container.RegistryServer,
+                    container.RegistryAuthUsername,
+                    container.RegistryAuthPassword);
+                if (loginExitCode == 0)
+                {
+                    break;
+                }
+                else
+                {
+                    retryCount++;
+                    if (retryCount < 3)
+                    {
+                        var backOff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(10));
+                        executionContext.Warning($"Docker login for '{container.RegistryServer}' failed with exit code {loginExitCode}, back off {backOff.TotalSeconds} seconds before retry.");
+                        await Task.Delay(backOff);
+                    }
+                }
+            }
+
+            if (retryCount == 3 && loginExitCode != 0)
             {
                 throw new InvalidOperationException($"Docker login for '{container.RegistryServer}' failed with exit code {loginExitCode}");
             }
+
             return configLocation;
         }
 

src/Runner.Worker/DiagnosticLogManager.cs

@@ -91,13 +91,13 @@ namespace GitHub.Runner.Worker
             string phaseName = executionContext.Global.Variables.System_PhaseDisplayName ?? "UnknownPhaseName";
 
             // zip the files
-            string diagnosticsZipFileName = $"{buildName}-{phaseName}.zip";
+            string diagnosticsZipFileName = $"{buildName}-{IOUtil.ReplaceInvalidFileNameChars(phaseName)}.zip";
             string diagnosticsZipFilePath = Path.Combine(supportRootFolder, diagnosticsZipFileName);
             ZipFile.CreateFromDirectory(supportFilesFolder, diagnosticsZipFilePath);
 
             // upload the json metadata file
             executionContext.Debug("Uploading diagnostic metadata file.");
-            string metadataFileName = $"diagnostics-{buildName}-{phaseName}.json";
+            string metadataFileName = $"diagnostics-{buildName}-{IOUtil.ReplaceInvalidFileNameChars(phaseName)}.json";
             string metadataFilePath = Path.Combine(supportFilesFolder, metadataFileName);
             string phaseResult = GetTaskResultAsString(executionContext.Result);
 

src/Runner.Worker/FileCommandManager.cs

@@ -244,7 +244,7 @@ namespace GitHub.Runner.Worker
                 if (resultsReceiverEndpoint != null)
                 {
                     Trace.Info($"Queueing results file ({filePath}) for attachment upload ({attachmentName})");
-                    var stepId = context.Id;
+                    var stepId = context.IsEmbedded ? context.EmbeddedId : context.Id;
                     // Attachments must be added to the parent context (job), not the current context (step)
                     context.Root.QueueSummaryFile(attachmentName, scrubbedFilePath, stepId);
                 }

src/Runner.Worker/Handlers/ContainerActionHandler.cs

@@ -223,6 +223,10 @@ namespace GitHub.Runner.Worker.Handlers
             {
                 Environment["ACTIONS_CACHE_URL"] = cacheUrl;
             }
+            if (systemConnection.Data.TryGetValue("PipelinesServiceUrl", out var pipelinesServiceUrl) && !string.IsNullOrEmpty(pipelinesServiceUrl))
+            {
+                Environment["ACTIONS_RUNTIME_URL"] = pipelinesServiceUrl;
+            }
             if (systemConnection.Data.TryGetValue("GenerateIdTokenUrl", out var generateIdTokenUrl) && !string.IsNullOrEmpty(generateIdTokenUrl))
             {
                 Environment["ACTIONS_ID_TOKEN_REQUEST_URL"] = generateIdTokenUrl;

src/Runner.Worker/Handlers/HandlerFactory.cs

@@ -84,6 +84,45 @@ namespace GitHub.Runner.Worker.Handlers
                     }
                     nodeData.NodeVersion = "node16";
                 }
+
+                var localForceActionsToNode20 = StringUtil.ConvertToBoolean(Environment.GetEnvironmentVariable(Constants.Variables.Agent.ManualForceActionsToNode20));
+                executionContext.Global.EnvironmentVariables.TryGetValue(Constants.Variables.Actions.ManualForceActionsToNode20, out var workflowForceActionsToNode20);
+                var enforceNode20Locally = !string.IsNullOrWhiteSpace(workflowForceActionsToNode20) ? StringUtil.ConvertToBoolean(workflowForceActionsToNode20) : localForceActionsToNode20;
+                if (string.Equals(nodeData.NodeVersion, "node16")
+                && ((executionContext.Global.Variables.GetBoolean("DistributedTask.ForceGithubJavascriptActionsToNode20") ?? false) || enforceNode20Locally))
+                {
+                    executionContext.Global.EnvironmentVariables.TryGetValue(Constants.Variables.Actions.AllowActionsUseUnsecureNodeVersion, out var workflowOptOut);
+                    var isWorkflowOptOutSet = !string.IsNullOrWhiteSpace(workflowOptOut);
+                    var isLocalOptOut = StringUtil.ConvertToBoolean(Environment.GetEnvironmentVariable(Constants.Variables.Actions.AllowActionsUseUnsecureNodeVersion));
+                    bool isOptOut = isWorkflowOptOutSet ? StringUtil.ConvertToBoolean(workflowOptOut) : isLocalOptOut;
+
+                    if (!isOptOut)
+                    {
+                        var repoAction = action as Pipelines.RepositoryPathReference;
+                        if (repoAction != null)
+                        {
+                            var warningActions = new HashSet<string>();
+                            if (executionContext.Global.Variables.TryGetValue(Constants.Runner.EnforcedNode16DetectedAfterEndOfLifeEnvVariable, out var node20ForceWarnings))
+                            {
+                                warningActions = StringUtil.ConvertFromJson<HashSet<string>>(node20ForceWarnings);
+                            }
+
+                            string repoActionFullName;
+                            if (string.IsNullOrEmpty(repoAction.Name))
+                            {
+                                repoActionFullName = repoAction.Path; // local actions don't have a 'Name'
+                            }
+                            else
+                            {
+                                repoActionFullName = $"{repoAction.Name}/{repoAction.Path ?? string.Empty}".TrimEnd('/') + $"@{repoAction.Ref}";
+                            }
+
+                            warningActions.Add(repoActionFullName);
+                            executionContext.Global.Variables.Set(Constants.Runner.EnforcedNode16DetectedAfterEndOfLifeEnvVariable, StringUtil.ConvertToJson(warningActions));
+                        }
+                        nodeData.NodeVersion = "node20";
+                    }
+                }
                 (handler as INodeScriptActionHandler).Data = nodeData;
             }
             else if (data.ExecutionType == ActionExecutionType.Script)

src/Runner.Worker/Handlers/NodeScriptActionHandler.cs

@@ -58,6 +58,10 @@ namespace GitHub.Runner.Worker.Handlers
             {
                 Environment["ACTIONS_CACHE_URL"] = cacheUrl;
             }
+            if (systemConnection.Data.TryGetValue("PipelinesServiceUrl", out var pipelinesServiceUrl) && !string.IsNullOrEmpty(pipelinesServiceUrl))
+            {
+                Environment["ACTIONS_RUNTIME_URL"] = pipelinesServiceUrl;
+            }
             if (systemConnection.Data.TryGetValue("GenerateIdTokenUrl", out var generateIdTokenUrl) && !string.IsNullOrEmpty(generateIdTokenUrl))
             {
                 Environment["ACTIONS_ID_TOKEN_REQUEST_URL"] = generateIdTokenUrl;
@@ -114,6 +118,11 @@ namespace GitHub.Runner.Worker.Handlers
             {
                 Data.NodeVersion = "node16";
             }
+
+            if (forcedNodeVersion == "node20" && Data.NodeVersion != "node20")
+            {
+                Data.NodeVersion = "node20";
+            }
             var nodeRuntimeVersion = await StepHost.DetermineNodeRuntimeVersion(ExecutionContext, Data.NodeVersion);
             string file = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), nodeRuntimeVersion, "bin", $"node{IOUtil.ExeExtension}");
 

src/Runner.Worker/Handlers/ScriptHandler.cs

@@ -83,40 +83,19 @@ namespace GitHub.Runner.Worker.Handlers
                 shellCommand = "pwsh";
                 if (validateShellOnHost)
                 {
-                    if (ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseWhich2") == true)
-                    {
-                        shellCommandPath = WhichUtil.Which2(shellCommand, require: false, Trace, prependPath);
-                    }
-                    else
-                    {
-                        shellCommandPath = WhichUtil.Which(shellCommand, require: false, Trace, prependPath);
-                    }
+                    shellCommandPath = WhichUtil.Which(shellCommand, require: false, Trace, prependPath);
                     if (string.IsNullOrEmpty(shellCommandPath))
                     {
                         shellCommand = "powershell";
-                        Trace.Info($"Defaulting to {shellCommand}");
-                        if (ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseWhich2") == true)
-                        {
-                            shellCommandPath = WhichUtil.Which2(shellCommand, require: true, Trace, prependPath);
-                        }
-                        else
-                        {
-                            shellCommandPath = WhichUtil.Which(shellCommand, require: true, Trace, prependPath);
-                        }
+                        Trace.Info($"Defaulting to {shellCommand}");                        
+                        shellCommandPath = WhichUtil.Which(shellCommand, require: true, Trace, prependPath);
                     }
                 }
 #else
                 shellCommand = "sh";
                 if (validateShellOnHost)
                 {
-                    if (ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseWhich2") == true)
-                    {
-                        shellCommandPath = WhichUtil.Which2("bash", false, Trace, prependPath) ?? WhichUtil.Which2("sh", true, Trace, prependPath);
-                    }
-                    else
-                    {
-                        shellCommandPath = WhichUtil.Which("bash", false, Trace, prependPath) ?? WhichUtil.Which("sh", true, Trace, prependPath);
-                    }
+                    shellCommandPath = WhichUtil.Which("bash", false, Trace, prependPath) ?? WhichUtil.Which("sh", true, Trace, prependPath);
                 }
 #endif
                 argFormat = ScriptHandlerHelpers.GetScriptArgumentsFormat(shellCommand);
@@ -127,14 +106,7 @@ namespace GitHub.Runner.Worker.Handlers
                 shellCommand = parsed.shellCommand;
                 if (validateShellOnHost)
                 {
-                    if (ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseWhich2") == true)
-                    {
-                        shellCommandPath = WhichUtil.Which2(parsed.shellCommand, true, Trace, prependPath);
-                    }
-                    else
-                    {
-                        shellCommandPath = WhichUtil.Which(parsed.shellCommand, true, Trace, prependPath);
-                    }
+                    shellCommandPath = WhichUtil.Which(parsed.shellCommand, true, Trace, prependPath);
                 }
 
                 argFormat = $"{parsed.shellArgs}".TrimStart();
@@ -216,38 +188,17 @@ namespace GitHub.Runner.Worker.Handlers
             {
 #if OS_WINDOWS
                 shellCommand = "pwsh";
-                if (ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseWhich2") == true)
-                {
-                    commandPath = WhichUtil.Which2(shellCommand, require: false, Trace, prependPath);
-                }
-                else
-                {
-                    commandPath = WhichUtil.Which(shellCommand, require: false, Trace, prependPath);
-                }
+                commandPath = WhichUtil.Which(shellCommand, require: false, Trace, prependPath);
                 if (string.IsNullOrEmpty(commandPath))
                 {
                     shellCommand = "powershell";
                     Trace.Info($"Defaulting to {shellCommand}");
-                    if (ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseWhich2") == true)
-                    {
-                        commandPath = WhichUtil.Which2(shellCommand, require: true, Trace, prependPath);
-                    }
-                    else
-                    {
-                        commandPath = WhichUtil.Which(shellCommand, require: true, Trace, prependPath);
-                    }
+                    commandPath = WhichUtil.Which(shellCommand, require: true, Trace, prependPath);
                 }
                 ArgUtil.NotNullOrEmpty(commandPath, "Default Shell");
 #else
                 shellCommand = "sh";
-                if (ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseWhich2") == true)
-                {
-                    commandPath = WhichUtil.Which2("bash", false, Trace, prependPath) ?? WhichUtil.Which2("sh", true, Trace, prependPath);
-                }
-                else
-                {
-                    commandPath = WhichUtil.Which("bash", false, Trace, prependPath) ?? WhichUtil.Which("sh", true, Trace, prependPath);
-                }
+                commandPath = WhichUtil.Which("bash", false, Trace, prependPath) ?? WhichUtil.Which("sh", true, Trace, prependPath);
 #endif
                 argFormat = ScriptHandlerHelpers.GetScriptArgumentsFormat(shellCommand);
             }
@@ -258,14 +209,7 @@ namespace GitHub.Runner.Worker.Handlers
                 if (!IsActionStep && systemShells.Contains(shell))
                 {
                     shellCommand = shell;
-                    if (ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseWhich2") == true)
-                    {
-                        commandPath = WhichUtil.Which2(shell, !isContainerStepHost, Trace, prependPath);
-                    }
-                    else
-                    {
-                        commandPath = WhichUtil.Which(shell, !isContainerStepHost, Trace, prependPath);
-                    }
+                    commandPath = WhichUtil.Which(shell, !isContainerStepHost, Trace, prependPath);
                     if (shell == "bash")
                     {
                         argFormat = ScriptHandlerHelpers.GetScriptArgumentsFormat("sh");
@@ -280,14 +224,7 @@ namespace GitHub.Runner.Worker.Handlers
                     var parsed = ScriptHandlerHelpers.ParseShellOptionString(shell);
                     shellCommand = parsed.shellCommand;
                     // For non-ContainerStepHost, the command must be located on the host by Which
-                    if (ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseWhich2") == true)
-                    {
-                        commandPath = WhichUtil.Which2(parsed.shellCommand, !isContainerStepHost, Trace, prependPath);
-                    }
-                    else
-                    {
-                        commandPath = WhichUtil.Which(parsed.shellCommand, !isContainerStepHost, Trace, prependPath);
-                    }
+                    commandPath = WhichUtil.Which(parsed.shellCommand, !isContainerStepHost, Trace, prependPath);
                     argFormat = $"{parsed.shellArgs}".TrimStart();
                     if (string.IsNullOrEmpty(argFormat))
                     {

src/Runner.Worker/JobExtension.cs

@@ -392,6 +392,18 @@ namespace GitHub.Runner.Worker
                         }
                     }
 
+                    // Register custom image creation post-job step if the "snapshot" token is present in the message.
+                    var snapshotRequest = templateEvaluator.EvaluateJobSnapshotRequest(message.Snapshot, jobContext.ExpressionValues, jobContext.ExpressionFunctions);
+                    if (snapshotRequest != null)
+                    {
+                        var snapshotOperationProvider = HostContext.GetService<ISnapshotOperationProvider>();
+                        jobContext.RegisterPostJobStep(new JobExtensionRunner(
+                            runAsync: (executionContext, _) => snapshotOperationProvider.CreateSnapshotRequestAsync(executionContext, snapshotRequest),
+                            condition: $"{PipelineTemplateConstants.Success}()",
+                            displayName: $"Create custom image",
+                            data: null));
+                    }
+
                     // Register Job Completed hook if the variable is set
                     var completedHookPath = Environment.GetEnvironmentVariable("ACTIONS_RUNNER_HOOK_JOB_COMPLETED");
                     if (!string.IsNullOrEmpty(completedHookPath))

src/Runner.Worker/JobRunner.cs

@@ -42,6 +42,7 @@ namespace GitHub.Runner.Worker
             Trace.Info("Job ID {0}", message.JobId);
 
             DateTime jobStartTimeUtc = DateTime.UtcNow;
+            _runnerSettings = HostContext.GetService<IConfigurationStore>().GetSettings();
             IRunnerService server = null;
 
             // add orchestration id to useragent for better correlation.
@@ -54,13 +55,6 @@ namespace GitHub.Runner.Worker
                 VssUtil.InitializeVssClientSettings(HostContext.UserAgents, HostContext.WebProxy);
             }
 
-            var jobServerQueueTelemetry = false;
-            if (message.Variables.TryGetValue("DistributedTask.EnableJobServerQueueTelemetry", out VariableValue enableJobServerQueueTelemetry) &&
-                !string.IsNullOrEmpty(enableJobServerQueueTelemetry?.Value))
-            {
-                jobServerQueueTelemetry = StringUtil.ConvertToBoolean(enableJobServerQueueTelemetry.Value);
-            }
-
             ServiceEndpoint systemConnection = message.Resources.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
             if (MessageUtil.IsRunServiceJob(message.MessageType))
             {
@@ -82,7 +76,7 @@ namespace GitHub.Runner.Worker
                     launchServer.InitializeLaunchClient(new Uri(launchReceiverEndpoint), accessToken);
                 }
                 _jobServerQueue = HostContext.GetService<IJobServerQueue>();
-                _jobServerQueue.Start(message, resultsServiceOnly: true, enableTelemetry: jobServerQueueTelemetry);
+                _jobServerQueue.Start(message, resultsServiceOnly: true);
             }
             else
             {
@@ -104,7 +98,7 @@ namespace GitHub.Runner.Worker
                 VssConnection jobConnection = VssUtil.CreateConnection(jobServerUrl, jobServerCredential, delegatingHandlers);
                 await jobServer.ConnectAsync(jobConnection);
 
-                _jobServerQueue.Start(message, enableTelemetry: jobServerQueueTelemetry);
+                _jobServerQueue.Start(message);
                 server = jobServer;
             }
 
@@ -164,8 +158,6 @@ namespace GitHub.Runner.Worker
 
                 jobContext.SetRunnerContext("os", VarUtil.OS);
                 jobContext.SetRunnerContext("arch", VarUtil.OSArchitecture);
-
-                _runnerSettings = HostContext.GetService<IConfigurationStore>().GetSettings();
                 jobContext.SetRunnerContext("name", _runnerSettings.AgentName);
 
                 if (jobContext.Global.Variables.TryGetValue(WellKnownDistributedTaskVariables.RunnerEnvironment, out var runnerEnvironment))
@@ -298,6 +290,12 @@ namespace GitHub.Runner.Worker
                 jobContext.Warning(string.Format(Constants.Runner.EnforcedNode12DetectedAfterEndOfLife, actions));
             }
 
+            if (jobContext.Global.Variables.TryGetValue(Constants.Runner.EnforcedNode16DetectedAfterEndOfLifeEnvVariable, out var node20ForceWarnings) && (jobContext.Global.Variables.GetBoolean("DistributedTask.ForceGithubJavascriptActionsToNode20") ?? false))
+            {
+                var actions = string.Join(", ", StringUtil.ConvertFromJson<HashSet<string>>(node20ForceWarnings));
+                jobContext.Warning(string.Format(Constants.Runner.EnforcedNode16DetectedAfterEndOfLife, actions));
+            }
+
             await ShutdownQueue(throwOnFailure: false);
 
             // Make sure to clean temp after file upload since they may be pending fileupload still use the TEMP dir.
@@ -405,6 +403,12 @@ namespace GitHub.Runner.Worker
                 jobContext.Warning(string.Format(Constants.Runner.EnforcedNode12DetectedAfterEndOfLife, actions));
             }
 
+            if (jobContext.Global.Variables.TryGetValue(Constants.Runner.EnforcedNode16DetectedAfterEndOfLifeEnvVariable, out var node20ForceWarnings))
+            {
+                var actions = string.Join(", ", StringUtil.ConvertFromJson<HashSet<string>>(node20ForceWarnings));
+                jobContext.Warning(string.Format(Constants.Runner.EnforcedNode16DetectedAfterEndOfLife, actions));
+            }
+
             try
             {
                 var jobQueueTelemetry = await ShutdownQueue(throwOnFailure: true);

src/Runner.Worker/SnapshotOperationProvider.cs

@@ -0,0 +1,32 @@
+#nullable enable
+using System.IO;
+using System.Threading.Tasks;
+using GitHub.DistributedTask.Pipelines;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+namespace GitHub.Runner.Worker;
+
+[ServiceLocator(Default = typeof(SnapshotOperationProvider))]
+public interface ISnapshotOperationProvider : IRunnerService
+{
+    Task CreateSnapshotRequestAsync(IExecutionContext executionContext, Snapshot snapshotRequest);
+}
+
+public class SnapshotOperationProvider : RunnerService, ISnapshotOperationProvider
+{
+    public Task CreateSnapshotRequestAsync(IExecutionContext executionContext, Snapshot snapshotRequest)
+    {
+        var snapshotRequestFilePath = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), ".snapshot", "request.json");
+        var snapshotRequestDirectoryPath = Path.GetDirectoryName(snapshotRequestFilePath);
+        if (snapshotRequestDirectoryPath != null)
+        {
+            Directory.CreateDirectory(snapshotRequestDirectoryPath);
+        }
+
+        IOUtil.SaveObject(snapshotRequest, snapshotRequestFilePath);
+        executionContext.Output($"Request written to: {snapshotRequestFilePath}");
+        executionContext.Output("This request will be processed after the job completes. You will not receive any feedback on the snapshot process within the workflow logs of this job.");
+        executionContext.Output("If the snapshot process is successful, you should see a new image with the requested name in the list of available custom images when creating a new GitHub-hosted Runner.");
+        return Task.CompletedTask;
+    }
+}

src/Runner.Worker/StepsRunner.cs

@@ -295,7 +295,7 @@ namespace GitHub.Runner.Worker
                     !jobCancellationToken.IsCancellationRequested)
                 {
                     Trace.Error($"Caught timeout exception from step: {ex.Message}");
-                    step.ExecutionContext.Error("The action has timed out.");
+                    step.ExecutionContext.Error($"The action '{step.DisplayName}' has timed out after {timeoutMinutes} minutes.");
                     step.ExecutionContext.Result = TaskResult.Failed;
                 }
                 else

src/Sdk/Common/Common/VssHttpMessageHandler.cs

@@ -214,25 +214,7 @@ namespace GitHub.Services.Common
                     // ConfigureAwait(false) enables the continuation to be run outside any captured
                     // SyncronizationContext (such as ASP.NET's) which keeps things from deadlocking...
 
-                    var tmpResponse = await m_messageInvoker.SendAsync(request, tokenSource.Token).ConfigureAwait(false);
-                    if (Settings.AllowAutoRedirectForBroker && tmpResponse.StatusCode == HttpStatusCode.Redirect)
-                    {
-                        //Dispose of the previous response
-                        tmpResponse?.Dispose();
-
-                        var location = tmpResponse.Headers.Location;
-                        request = new HttpRequestMessage(HttpMethod.Get, location);
-
-                        // Reapply the token to new redirected request
-                        ApplyToken(request, token, applyICredentialsToWebProxy: lastResponseDemandedProxyAuth);
-
-                        // Resend the request
-                        response = await m_messageInvoker.SendAsync(request, tokenSource.Token).ConfigureAwait(false);
-                    }
-                    else
-                    {
-                        response = tmpResponse;
-                    }
+                    response = await m_messageInvoker.SendAsync(request, tokenSource.Token).ConfigureAwait(false);
 
                     traceInfo?.TraceRequestSendTime();
 

src/Sdk/Common/Common/VssHttpRequestSettings.cs

@@ -110,16 +110,6 @@ namespace GitHub.Services.Common
             set;
         }
 
-        /// <summary>
-        /// Gets or sets a value indicating whether or not HttpClientHandler should follow redirect on outgoing broker requests
-        /// This is special since this also sends token in the request, where as default AllowAutoRedirect does not
-        /// </summary>
-        public Boolean AllowAutoRedirectForBroker
-        {
-            get;
-            set;
-        }
-
         /// <summary>
         /// Gets or sets a value indicating whether or not compression should be used on outgoing requests.
         /// The default value is true.

src/Sdk/DTPipelines/Pipelines/AgentJobRequestMessage.cs

@@ -43,6 +43,7 @@ namespace GitHub.DistributedTask.Pipelines
             TemplateToken jobOutputs,
             IList<TemplateToken> defaults,
             ActionsEnvironmentReference actionsEnvironment,
+            TemplateToken snapshot,
             String messageType = JobRequestMessageTypes.PipelineAgentJobRequest)
         {
             this.MessageType = messageType;
@@ -57,6 +58,7 @@ namespace GitHub.DistributedTask.Pipelines
             this.Workspace = workspaceOptions;
             this.JobOutputs = jobOutputs;
             this.ActionsEnvironment = actionsEnvironment;
+            this.Snapshot = snapshot;
             m_variables = new Dictionary<String, VariableValue>(variables, StringComparer.OrdinalIgnoreCase);
             m_maskHints = new List<MaskHint>(maskHints);
             m_steps = new List<JobStep>(steps);
@@ -237,6 +239,13 @@ namespace GitHub.DistributedTask.Pipelines
             set;
         }
 
+        [DataMember(EmitDefaultValue = false)]
+        public TemplateToken Snapshot
+        {
+            get;
+            set;
+        }
+
         /// <summary>
         /// Gets the collection of variables associated with the current context.
         /// </summary>

src/Sdk/DTPipelines/Pipelines/ObjectTemplating/PipelineTemplateConstants.cs

@@ -29,6 +29,7 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String Id = "id";
         public const String If = "if";
         public const String Image = "image";
+        public const String ImageName = "image-name";
         public const String Include = "include";
         public const String Inputs = "inputs";
         public const String Job = "job";
@@ -60,6 +61,7 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String Services = "services";
         public const String Shell = "shell";
         public const String Skipped = "skipped";
+        public const String Snapshot = "snapshot";
         public const String StepEnv = "step-env";
         public const String StepIfResult = "step-if-result";
         public const String StepWith = "step-with";

src/Sdk/DTPipelines/Pipelines/ObjectTemplating/PipelineTemplateConverter.cs

@@ -346,6 +346,39 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             return result;
         }
 
+        internal static Snapshot ConvertToJobSnapshotRequest(TemplateContext context, TemplateToken token)
+        {
+            string imageName = null;
+            if (token is StringToken snapshotStringLiteral)
+            {
+                imageName = snapshotStringLiteral.Value;
+            }
+            else
+            {
+                var snapshotMapping = token.AssertMapping($"{PipelineTemplateConstants.Snapshot}");
+                foreach (var snapshotPropertyPair in snapshotMapping)
+                {
+                    var propertyName = snapshotPropertyPair.Key.AssertString($"{PipelineTemplateConstants.Snapshot} key");
+                    switch (propertyName.Value)
+                    {
+                        case PipelineTemplateConstants.ImageName:
+                            imageName = snapshotPropertyPair.Value.AssertString($"{PipelineTemplateConstants.Snapshot} {propertyName}").Value;
+                            break;
+                        default:
+                            propertyName.AssertUnexpectedValue($"{PipelineTemplateConstants.Snapshot} key");
+                            break;
+                    }
+                }
+            }
+
+            if (String.IsNullOrEmpty(imageName))
+            {
+                return null;
+            }
+
+            return new Snapshot(imageName);
+        }
+
         private static ActionStep ConvertToStep(
             TemplateContext context,
             TemplateToken stepsItem,

src/Sdk/DTPipelines/Pipelines/ObjectTemplating/PipelineTemplateEvaluator.cs

@@ -370,6 +370,32 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             return result;
         }
 
+        public Snapshot EvaluateJobSnapshotRequest(TemplateToken token,
+            DictionaryContextData contextData,
+            IList<IFunctionInfo> expressionFunctions)
+        {
+            var result = default(Snapshot);
+
+            if (token != null && token.Type != TokenType.Null)
+            {
+                var context = CreateContext(contextData, expressionFunctions);
+                try
+                {
+                    token = TemplateEvaluator.Evaluate(context, PipelineTemplateConstants.Snapshot, token, 0, null, omitHeader: true);
+                    context.Errors.Check();
+                    result = PipelineTemplateConverter.ConvertToJobSnapshotRequest(context, token);
+                }
+                catch (Exception ex) when (!(ex is TemplateValidationException))
+                {
+                    context.Errors.Add(ex);
+                }
+
+                context.Errors.Check();
+            }
+
+            return result;
+        }
+
         private TemplateContext CreateContext(
             DictionaryContextData contextData,
             IList<IFunctionInfo> expressionFunctions,

src/Sdk/DTPipelines/Pipelines/Snapshot.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Runtime.Serialization;
+
+namespace GitHub.DistributedTask.Pipelines
+{
+    [DataContract]
+    public class Snapshot
+    {
+        public Snapshot(string imageName)
+        {
+            ImageName = imageName;
+        }
+
+        [DataMember(EmitDefaultValue = false)]
+        public String ImageName { get; set; }
+    }
+}

src/Sdk/DTPipelines/workflow-v1.0.json

@@ -71,7 +71,8 @@
           "env": "job-env",
           "outputs": "job-outputs",
           "defaults": "job-defaults",
-          "steps": "steps"
+          "steps": "steps",
+          "snapshot": "snapshot"
         }
       }
     },
@@ -155,6 +156,24 @@
       }
     },
 
+    "snapshot": {
+      "one-of": [
+        "non-empty-string",
+        "snapshot-mapping"
+      ]
+    },
+
+    "snapshot-mapping": {
+      "mapping": {
+        "properties": {
+          "image-name": {
+            "type": "non-empty-string",
+            "required": true
+          }
+        }
+      }
+    },
+
     "runs-on": {
       "context": [
         "github",

src/Sdk/DTWebApi/WebApi/ActionsRunServerHttpClient.cs

@@ -0,0 +1,95 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.IO.Compression;
+using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Services.Common;
+using GitHub.Services.Common.Diagnostics;
+using GitHub.Services.WebApi;
+using Newtonsoft.Json;
+
+namespace GitHub.DistributedTask.WebApi
+{
+    [ResourceArea(TaskResourceIds.AreaId)]
+    public class ActionsRunServerHttpClient : TaskAgentHttpClient
+    {
+        private static readonly JsonSerializerSettings s_serializerSettings;
+
+        static ActionsRunServerHttpClient()
+        {
+            s_serializerSettings = new VssJsonMediaTypeFormatter().SerializerSettings;
+            s_serializerSettings.DateParseHandling = DateParseHandling.None;
+            s_serializerSettings.FloatParseHandling = FloatParseHandling.Double;
+        }
+
+        public ActionsRunServerHttpClient(
+            Uri baseUrl,
+            VssCredentials credentials)
+            : base(baseUrl, credentials)
+        {
+        }
+
+        public ActionsRunServerHttpClient(
+            Uri baseUrl,
+            VssCredentials credentials,
+            VssHttpRequestSettings settings)
+            : base(baseUrl, credentials, settings)
+        {
+        }
+
+        public ActionsRunServerHttpClient(
+            Uri baseUrl,
+            VssCredentials credentials,
+            params DelegatingHandler[] handlers)
+            : base(baseUrl, credentials, handlers)
+        {
+        }
+
+        public ActionsRunServerHttpClient(
+            Uri baseUrl,
+            VssCredentials credentials,
+            VssHttpRequestSettings settings,
+            params DelegatingHandler[] handlers)
+            : base(baseUrl, credentials, settings, handlers)
+        {
+        }
+
+        public ActionsRunServerHttpClient(
+            Uri baseUrl,
+            HttpMessageHandler pipeline,
+            Boolean disposeHandler)
+            : base(baseUrl, pipeline, disposeHandler)
+        {
+        }
+
+        public Task<Pipelines.AgentJobRequestMessage> GetJobMessageAsync(
+            string messageId,
+            object userState = null,
+            CancellationToken cancellationToken = default)
+        {
+            HttpMethod httpMethod = new HttpMethod("GET");
+            Guid locationId = new Guid("25adab70-1379-4186-be8e-b643061ebe3a");
+            object routeValues = new { messageId = messageId };
+
+            return SendAsync<Pipelines.AgentJobRequestMessage>(
+                httpMethod,
+                locationId,
+                routeValues: routeValues,
+                version: new ApiResourceVersion(6.0, 1),
+                userState: userState,
+                cancellationToken: cancellationToken);
+        }
+
+        protected override async Task<T> ReadJsonContentAsync<T>(HttpResponseMessage response, CancellationToken cancellationToken = default(CancellationToken))
+        {
+            var json = await response.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
+            return JsonConvert.DeserializeObject<T>(json, s_serializerSettings);
+        }
+    }
+}

src/Sdk/DTWebApi/WebApi/Exceptions.cs

@@ -2498,6 +2498,25 @@ namespace GitHub.DistributedTask.WebApi
         }
     }
 
+    [Serializable]
+    public class NonRetryableActionDownloadInfoException : DistributedTaskException
+    {
+        public NonRetryableActionDownloadInfoException(String message)
+            : base(message)
+        {
+        }
+
+        public NonRetryableActionDownloadInfoException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        protected NonRetryableActionDownloadInfoException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
     [Serializable]
     public sealed class FailedToResolveActionDownloadInfoException : DistributedTaskException
     {

src/Sdk/DTWebApi/WebApi/TaskAgentHttpClient.cs

@@ -141,24 +141,6 @@ namespace GitHub.DistributedTask.WebApi
             return ReplaceAgentAsync(poolId, agent.Id, agent, userState, cancellationToken);
         }
 
-        public Task<Pipelines.AgentJobRequestMessage> GetJobMessageAsync(
-            string messageId,
-            object userState = null,
-            CancellationToken cancellationToken = default)
-        {
-            HttpMethod httpMethod = new HttpMethod("GET");
-            Guid locationId = new Guid("25adab70-1379-4186-be8e-b643061ebe3a");
-            object routeValues = new { messageId = messageId };
-
-            return SendAsync<Pipelines.AgentJobRequestMessage>(
-                httpMethod,
-                locationId,
-                routeValues: routeValues,
-                version: new ApiResourceVersion(6.0, 1),
-                userState: userState,
-                cancellationToken: cancellationToken);
-        }
-
         protected Task<T> SendAsync<T>(
             HttpMethod method,
             Guid locationId,

src/Sdk/RSWebApi/Contracts/AcquireJobRequest.cs

@@ -7,5 +7,8 @@ namespace GitHub.Actions.RunService.WebApi
     {
         [DataMember(Name = "jobMessageId", EmitDefaultValue = false)]
         public string JobMessageId { get; set; }
+
+        [DataMember(Name = "runnerOS", EmitDefaultValue = false)]
+        public string RunnerOS { get; set; }
     }
 }

src/Sdk/RSWebApi/RunServiceHttpClient.cs

@@ -9,6 +9,7 @@ using GitHub.DistributedTask.WebApi;
 using GitHub.Services.Common;
 using GitHub.Services.OAuth;
 using GitHub.Services.WebApi;
+using Newtonsoft.Json;
 using Sdk.RSWebApi.Contracts;
 using Sdk.WebApi.WebApi;
 
@@ -16,6 +17,15 @@ namespace GitHub.Actions.RunService.WebApi
 {
     public class RunServiceHttpClient : RawHttpClientBase
     {
+        private static readonly JsonSerializerSettings s_serializerSettings;
+
+        static RunServiceHttpClient()
+        {
+            s_serializerSettings = new VssJsonMediaTypeFormatter().SerializerSettings;
+            s_serializerSettings.DateParseHandling = DateParseHandling.None;
+            s_serializerSettings.FloatParseHandling = FloatParseHandling.Double;
+        }
+
         public RunServiceHttpClient(
             Uri baseUrl,
             VssOAuthCredential credentials)
@@ -59,12 +69,14 @@ namespace GitHub.Actions.RunService.WebApi
         public async Task<AgentJobRequestMessage> GetJobMessageAsync(
             Uri requestUri,
             string messageId,
+            string runnerOS,
             CancellationToken cancellationToken = default)
         {
             HttpMethod httpMethod = new HttpMethod("POST");
             var payload = new AcquireJobRequest
             {
                 JobMessageId = messageId,
+                RunnerOS = runnerOS
             };
 
             requestUri = new Uri(requestUri, "acquirejob");
@@ -172,5 +184,11 @@ namespace GitHub.Actions.RunService.WebApi
                     throw new Exception($"Failed to renew job: {result.Error}");
             }
         }
+
+        protected override async Task<T> ReadJsonContentAsync<T>(HttpResponseMessage response, CancellationToken cancellationToken = default(CancellationToken))
+        {
+            var json = await response.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
+            return JsonConvert.DeserializeObject<T>(json, s_serializerSettings);
+        }
     }
 }

src/Sdk/WebApi/WebApi/BrokerHttpClient.cs

@@ -110,9 +110,14 @@ namespace GitHub.Actions.RunService.WebApi
                 return result.Value;
             }
 
+            // the only time we throw a `Forbidden` exception from Listener /messages is when the runner is
+            // disable_update and is too old to poll
             if (result.StatusCode == HttpStatusCode.Forbidden)
             {
-                throw new AccessDeniedException(result.Error);
+                throw new AccessDeniedException($"{result.Error} Runner version v{runnerVersion} is deprecated and cannot receive messages.")
+                {
+                    ErrorCode = 1
+                };
             }
 
             throw new Exception($"Failed to get job message: {result.Error}");

src/Test/L0/Listener/BrokerMessageListenerL0.cs

@@ -56,11 +56,11 @@ namespace GitHub.Runner.Common.Tests.Listener
                 BrokerMessageListener listener = new();
                 listener.Initialize(tc);
 
-                bool result = await listener.CreateSessionAsync(tokenSource.Token);
+                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
                 trace.Info("result: {0}", result);
 
                 // Assert.
-                Assert.True(result);
+                Assert.Equal(CreateSessionResult.Success, result);
                 _brokerServer
                    .Verify(x => x.CreateSessionAsync(
                        It.Is<TaskAgentSession>(y => y != null),

src/Test/L0/Listener/JobDispatcherL0.cs

@@ -41,7 +41,7 @@ namespace GitHub.Runner.Common.Tests.Listener
             TaskOrchestrationPlanReference plan = new();
             TimelineReference timeline = null;
             Guid jobId = Guid.NewGuid();
-            var result = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "someJob", "someJob", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+            var result = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "someJob", "someJob", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
             result.ContextData["github"] = new Pipelines.ContextData.DictionaryContextData();
             return result;
         }
@@ -806,7 +806,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 },
                 null,
                 new List<TemplateToken>(),
-                new ActionsEnvironmentReference("env")
+                new ActionsEnvironmentReference("env"),
+                null
             );
             return message;
         }

src/Test/L0/Listener/MessageListenerL0.cs

@@ -75,11 +75,11 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                bool result = await listener.CreateSessionAsync(tokenSource.Token);
+                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
                 trace.Info("result: {0}", result);
 
                 // Assert.
-                Assert.True(result);
+                Assert.Equal(CreateSessionResult.Success, result);
                 _runnerServer
                     .Verify(x => x.CreateAgentSessionAsync(
                         _settings.PoolId,
@@ -135,11 +135,11 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                bool result = await listener.CreateSessionAsync(tokenSource.Token);
+                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
                 trace.Info("result: {0}", result);
 
                 // Assert.
-                Assert.True(result);
+                Assert.Equal(CreateSessionResult.Success, result);
 
                 _runnerServer
                     .Verify(x => x.CreateAgentSessionAsync(
@@ -185,8 +185,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                bool result = await listener.CreateSessionAsync(tokenSource.Token);
-                Assert.True(result);
+                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                Assert.Equal(CreateSessionResult.Success, result);
 
                 _runnerServer
                     .Setup(x => x.DeleteAgentSessionAsync(
@@ -245,10 +245,10 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                bool result = await listener.CreateSessionAsync(tokenSource.Token);
+                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
                 trace.Info("result: {0}", result);
 
-                Assert.True(result);
+                Assert.Equal(CreateSessionResult.Success, result);
 
                 _runnerServer
                     .Verify(x => x.CreateAgentSessionAsync(
@@ -272,7 +272,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 //Assert
                 _runnerServer
                     .Verify(x => x.DeleteAgentSessionAsync(
-                        _settings.PoolId, expectedSession.SessionId, It.IsAny<CancellationToken>()), Times.Never());
+                        _settings.PoolId, expectedBrokerSession.SessionId, It.IsAny<CancellationToken>()), Times.Once());
                 _brokerServer
                     .Verify(x => x.DeleteSessionAsync(It.IsAny<CancellationToken>()), Times.Once());
             }
@@ -309,8 +309,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                bool result = await listener.CreateSessionAsync(tokenSource.Token);
-                Assert.True(result);
+                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                Assert.Equal(CreateSessionResult.Success, result);
 
                 var arMessages = new TaskAgentMessage[]
                 {
@@ -390,8 +390,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                bool result = await listener.CreateSessionAsync(tokenSource.Token);
-                Assert.True(result);
+                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                Assert.Equal(CreateSessionResult.Success, result);
 
                 var brokerMigrationMesage = new BrokerMigrationMessage(new Uri("https://actions.broker.com"));
 
@@ -497,11 +497,11 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                bool result = await listener.CreateSessionAsync(tokenSource.Token);
+                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
                 trace.Info("result: {0}", result);
 
                 // Assert.
-                Assert.True(result);
+                Assert.Equal(CreateSessionResult.Success, result);
                 _runnerServer
                     .Verify(x => x.CreateAgentSessionAsync(
                         _settings.PoolId,
@@ -541,8 +541,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                bool result = await listener.CreateSessionAsync(tokenSource.Token);
-                Assert.True(result);
+                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                Assert.Equal(CreateSessionResult.Success, result);
 
                 _runnerServer
                     .Setup(x => x.GetAgentMessageAsync(

src/Test/L0/Listener/RunnerL0.cs

@@ -42,7 +42,7 @@ namespace GitHub.Runner.Common.Tests.Listener
             TaskOrchestrationPlanReference plan = new();
             TimelineReference timeline = null;
             Guid jobId = Guid.NewGuid();
-            return new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "test", "test", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+            return new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "test", "test", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
         }
 
         private JobCancelMessage CreateJobCancelMessage()
@@ -88,7 +88,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 _configurationManager.Setup(x => x.IsConfigured())
                     .Returns(true);
                 _messageListener.Setup(x => x.CreateSessionAsync(It.IsAny<CancellationToken>()))
-                    .Returns(Task.FromResult<bool>(true));
+                    .Returns(Task.FromResult<CreateSessionResult>(CreateSessionResult.Success));
                 _messageListener.Setup(x => x.GetNextMessageAsync(It.IsAny<CancellationToken>()))
                     .Returns(async () =>
                         {
@@ -184,7 +184,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 _configStore.Setup(x => x.IsServiceConfigured()).Returns(configureAsService);
 
                 _messageListener.Setup(x => x.CreateSessionAsync(It.IsAny<CancellationToken>()))
-                    .Returns(Task.FromResult(false));
+                    .Returns(Task.FromResult<CreateSessionResult>(CreateSessionResult.Failure));
 
                 var runner = new Runner.Listener.Runner();
                 runner.Initialize(hc);
@@ -217,7 +217,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                     .Returns(false);
 
                 _messageListener.Setup(x => x.CreateSessionAsync(It.IsAny<CancellationToken>()))
-                    .Returns(Task.FromResult(false));
+                    .Returns(Task.FromResult<CreateSessionResult>(CreateSessionResult.Failure));
 
                 var runner = new Runner.Listener.Runner();
                 runner.Initialize(hc);
@@ -263,7 +263,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 _configurationManager.Setup(x => x.IsConfigured())
                     .Returns(true);
                 _messageListener.Setup(x => x.CreateSessionAsync(It.IsAny<CancellationToken>()))
-                    .Returns(Task.FromResult<bool>(true));
+                    .Returns(Task.FromResult<CreateSessionResult>(CreateSessionResult.Success));
                 _messageListener.Setup(x => x.GetNextMessageAsync(It.IsAny<CancellationToken>()))
                     .Returns(async () =>
                         {
@@ -363,7 +363,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 _configurationManager.Setup(x => x.IsConfigured())
                     .Returns(true);
                 _messageListener.Setup(x => x.CreateSessionAsync(It.IsAny<CancellationToken>()))
-                    .Returns(Task.FromResult<bool>(true));
+                    .Returns(Task.FromResult<CreateSessionResult>(CreateSessionResult.Success));
                 _messageListener.Setup(x => x.GetNextMessageAsync(It.IsAny<CancellationToken>()))
                     .Returns(async () =>
                         {
@@ -458,7 +458,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 _configurationManager.Setup(x => x.IsConfigured())
                     .Returns(true);
                 _messageListener.Setup(x => x.CreateSessionAsync(It.IsAny<CancellationToken>()))
-                    .Returns(Task.FromResult<bool>(true));
+                    .Returns(Task.FromResult<CreateSessionResult>(CreateSessionResult.Success));
                 _messageListener.Setup(x => x.GetNextMessageAsync(It.IsAny<CancellationToken>()))
                     .Returns(async () =>
                         {

src/Test/L0/Util/IOUtilL0.cs

@@ -960,6 +960,33 @@ namespace GitHub.Runner.Common.Tests.Util
             }
         }
 
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Common")]
+        public void ReplaceInvalidFileNameChars()
+        {
+            Assert.Equal(string.Empty, IOUtil.ReplaceInvalidFileNameChars(null));
+            Assert.Equal(string.Empty, IOUtil.ReplaceInvalidFileNameChars(string.Empty));
+            Assert.Equal("hello.txt", IOUtil.ReplaceInvalidFileNameChars("hello.txt"));
+#if OS_WINDOWS
+            // Refer https://github.com/dotnet/runtime/blob/ce84f1d8a3f12711bad678a33efbc37b461f684f/src/libraries/System.Private.CoreLib/src/System/IO/Path.Windows.cs#L15
+            Assert.Equal(
+                "1_ 2_ 3_ 4_ 5_ 6_ 7_ 8_ 9_ 10_ 11_ 12_ 13_ 14_ 15_ 16_ 17_ 18_ 19_ 20_ 21_ 22_ 23_ 24_ 25_ 26_ 27_ 28_ 29_ 30_ 31_ 32_ 33_ 34_ 35_ 36_ 37_ 38_ 39_ 40_ 41_",
+                IOUtil.ReplaceInvalidFileNameChars($"1\" 2< 3> 4| 5\0 6{(char)1} 7{(char)2} 8{(char)3} 9{(char)4} 10{(char)5} 11{(char)6} 12{(char)7} 13{(char)8} 14{(char)9} 15{(char)10} 16{(char)11} 17{(char)12} 18{(char)13} 19{(char)14} 20{(char)15} 21{(char)16} 22{(char)17} 23{(char)18} 24{(char)19} 25{(char)20} 26{(char)21} 27{(char)22} 28{(char)23} 29{(char)24} 30{(char)25} 31{(char)26} 32{(char)27} 33{(char)28} 34{(char)29} 35{(char)30} 36{(char)31} 37: 38* 39? 40\\ 41/"));
+#else
+            // Refer https://github.com/dotnet/runtime/blob/ce84f1d8a3f12711bad678a33efbc37b461f684f/src/libraries/System.Private.CoreLib/src/System/IO/Path.Unix.cs#L12
+            Assert.Equal("1_ 2_", IOUtil.ReplaceInvalidFileNameChars("1\0 2/"));
+#endif
+            Assert.Equal("_leading", IOUtil.ReplaceInvalidFileNameChars("/leading"));
+            Assert.Equal("__consecutive leading", IOUtil.ReplaceInvalidFileNameChars("//consecutive leading"));
+            Assert.Equal("trailing_", IOUtil.ReplaceInvalidFileNameChars("trailing/"));
+            Assert.Equal("consecutive trailing__", IOUtil.ReplaceInvalidFileNameChars("consecutive trailing//"));
+            Assert.Equal("middle_middle", IOUtil.ReplaceInvalidFileNameChars("middle/middle"));
+            Assert.Equal("consecutive middle__consecutive middle", IOUtil.ReplaceInvalidFileNameChars("consecutive middle//consecutive middle"));
+            Assert.Equal("_leading_middle_trailing_", IOUtil.ReplaceInvalidFileNameChars("/leading/middle/trailing/"));
+            Assert.Equal("__consecutive leading__consecutive middle__consecutive trailing__", IOUtil.ReplaceInvalidFileNameChars("//consecutive leading//consecutive middle//consecutive trailing//"));
+        }
+
         private static async Task CreateDirectoryReparsePoint(IHostContext context, string link, string target)
         {
 #if OS_WINDOWS

src/Test/L0/Util/WhichUtilL0.cs

@@ -212,210 +212,5 @@ namespace GitHub.Runner.Common.Tests.Util
             File.Delete(brokenSymlink);
             Environment.SetEnvironmentVariable(PathUtil.PathVariable, oldValue);
         }
-
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Common")]
-        public void UseWhich2FindGit()
-        {
-            using (TestHostContext hc = new(this))
-            {
-                //Arrange
-                Tracing trace = hc.GetTrace();
-
-                // Act.
-                string gitPath = WhichUtil.Which2("git", trace: trace);
-
-                trace.Info($"Which(\"git\") returns: {gitPath ?? string.Empty}");
-
-                // Assert.
-                Assert.True(!string.IsNullOrEmpty(gitPath) && File.Exists(gitPath), $"Unable to find Git through: {nameof(WhichUtil.Which)}");
-            }
-        }
-
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Common")]
-        public void Which2ReturnsNullWhenNotFound()
-        {
-            using (TestHostContext hc = new(this))
-            {
-                //Arrange
-                Tracing trace = hc.GetTrace();
-
-                // Act.
-                string nosuch = WhichUtil.Which2("no-such-file-cf7e351f", trace: trace);
-
-                trace.Info($"result: {nosuch ?? string.Empty}");
-
-                // Assert.
-                Assert.True(string.IsNullOrEmpty(nosuch), "Path should not be resolved");
-            }
-        }
-
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Common")]
-        public void Which2ThrowsWhenRequireAndNotFound()
-        {
-            using (TestHostContext hc = new(this))
-            {
-                //Arrange
-                Tracing trace = hc.GetTrace();
-
-                // Act.
-                try
-                {
-                    WhichUtil.Which2("no-such-file-cf7e351f", require: true, trace: trace);
-                    throw new Exception("which should have thrown");
-                }
-                catch (FileNotFoundException ex)
-                {
-                    Assert.Equal("no-such-file-cf7e351f", ex.FileName);
-                }
-            }
-        }
-
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Common")]
-        public void Which2HandleFullyQualifiedPath()
-        {
-            using (TestHostContext hc = new(this))
-            {
-                //Arrange
-                Tracing trace = hc.GetTrace();
-
-                // Act.
-                var gitPath = WhichUtil.Which2("git", require: true, trace: trace);
-                var gitPath2 = WhichUtil.Which2(gitPath, require: true, trace: trace);
-
-                // Assert.
-                Assert.Equal(gitPath, gitPath2);
-            }
-        }
-
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Common")]
-        public void Which2HandlesSymlinkToTargetFullPath()
-        {
-            // Arrange
-            using TestHostContext hc = new TestHostContext(this);
-            Tracing trace = hc.GetTrace();
-            string oldValue = Environment.GetEnvironmentVariable(PathUtil.PathVariable);
-#if OS_WINDOWS
-            string newValue = oldValue + @$";{Path.GetTempPath()}";
-            string symlinkName = $"symlink-{Guid.NewGuid()}";
-            string symlink = Path.GetTempPath() + $"{symlinkName}.exe";
-            string target = Path.GetTempPath() + $"target-{Guid.NewGuid()}.exe";
-#else
-            string newValue = oldValue + @$":{Path.GetTempPath()}";
-            string symlinkName = $"symlink-{Guid.NewGuid()}";
-            string symlink = Path.GetTempPath() + $"{symlinkName}";
-            string target = Path.GetTempPath() + $"target-{Guid.NewGuid()}";
-#endif
-
-            Environment.SetEnvironmentVariable(PathUtil.PathVariable, newValue);
-
-
-            using (File.Create(target))
-            {
-                File.CreateSymbolicLink(symlink, target);
-
-                // Act.
-                var result = WhichUtil.Which2(symlinkName, require: true, trace: trace);
-
-                // Assert
-                Assert.True(!string.IsNullOrEmpty(result) && File.Exists(result), $"Unable to find symlink through: {nameof(WhichUtil.Which)}");
-
-            }
-
-
-            // Cleanup
-            File.Delete(symlink);
-            File.Delete(target);
-            Environment.SetEnvironmentVariable(PathUtil.PathVariable, oldValue);
-
-        }
-
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Common")]
-        public void Which2HandlesSymlinkToTargetRelativePath()
-        {
-            // Arrange
-            using TestHostContext hc = new TestHostContext(this);
-            Tracing trace = hc.GetTrace();
-            string oldValue = Environment.GetEnvironmentVariable(PathUtil.PathVariable);
-#if OS_WINDOWS
-            string newValue = oldValue + @$";{Path.GetTempPath()}";
-            string symlinkName = $"symlink-{Guid.NewGuid()}";
-            string symlink = Path.GetTempPath() + $"{symlinkName}.exe";
-            string targetName = $"target-{Guid.NewGuid()}.exe";
-            string target = Path.GetTempPath() + targetName;
-#else
-            string newValue = oldValue + @$":{Path.GetTempPath()}";
-            string symlinkName = $"symlink-{Guid.NewGuid()}";
-            string symlink = Path.GetTempPath() + $"{symlinkName}";
-            string targetName = $"target-{Guid.NewGuid()}";
-            string target = Path.GetTempPath() + targetName;
-#endif
-            Environment.SetEnvironmentVariable(PathUtil.PathVariable, newValue);
-
-
-            using (File.Create(target))
-            {
-                File.CreateSymbolicLink(symlink, targetName);
-
-                // Act.
-                var result = WhichUtil.Which2(symlinkName, require: true, trace: trace);
-
-                // Assert
-                Assert.True(!string.IsNullOrEmpty(result) && File.Exists(result), $"Unable to find {symlinkName} through: {nameof(WhichUtil.Which)}");
-            }
-
-            // Cleanup
-            File.Delete(symlink);
-            File.Delete(target);
-            Environment.SetEnvironmentVariable(PathUtil.PathVariable, oldValue);
-
-        }
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Common")]
-        public void Which2ThrowsWhenSymlinkBroken()
-        {
-            // Arrange
-            using TestHostContext hc = new TestHostContext(this);
-            Tracing trace = hc.GetTrace();
-            string oldValue = Environment.GetEnvironmentVariable(PathUtil.PathVariable);
-
-#if OS_WINDOWS
-            string newValue = oldValue + @$";{Path.GetTempPath()}";
-            string brokenSymlinkName = $"broken-symlink-{Guid.NewGuid()}";
-            string brokenSymlink = Path.GetTempPath() + $"{brokenSymlinkName}.exe";
-#else
-            string newValue = oldValue + @$":{Path.GetTempPath()}";
-            string brokenSymlinkName = $"broken-symlink-{Guid.NewGuid()}";
-            string brokenSymlink = Path.GetTempPath() + $"{brokenSymlinkName}";
-#endif
-
-
-            string target = "no-such-file-cf7e351f";
-            Environment.SetEnvironmentVariable(PathUtil.PathVariable, newValue);
-
-            File.CreateSymbolicLink(brokenSymlink, target);
-
-            // Act.
-            var exception = Assert.Throws<FileNotFoundException>(() => WhichUtil.Which2(brokenSymlinkName, require: true, trace: trace));
-
-            // Assert
-            Assert.Equal(brokenSymlinkName, exception.FileName);
-
-            // Cleanup
-            File.Delete(brokenSymlink);
-            Environment.SetEnvironmentVariable(PathUtil.PathVariable, oldValue);
-        }
     }
 }

src/Test/L0/Worker/ActionCommandManagerL0.cs

@@ -232,7 +232,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,

src/Test/L0/Worker/ActionManagerL0.cs

@@ -382,8 +382,6 @@ runs:
                     }
                 };
 
-                _ec.Object.Global.Variables.Set("DistributedTask.UseActionArchiveCache", bool.TrueString);
-
                 //Act
                 await _actionManager.PrepareActionsAsync(_ec.Object, actions);
 
@@ -2375,10 +2373,6 @@ runs:
             _ec.Setup(x => x.CancellationToken).Returns(_ecTokenSource.Token);
             _ec.Setup(x => x.Root).Returns(new GitHub.Runner.Worker.ExecutionContext());
             var variables = new Dictionary<string, VariableValue>();
-            if (enableComposite)
-            {
-                variables["DistributedTask.EnableCompositeActions"] = "true";
-            }
             _ec.Object.Global.Variables = new Variables(_hc, variables);
             _ec.Setup(x => x.ExpressionValues).Returns(new DictionaryContextData());
             _ec.Setup(x => x.ExpressionFunctions).Returns(new List<IFunctionInfo>());

src/Test/L0/Worker/CreateStepSummaryCommandL0.cs

@@ -193,7 +193,7 @@ namespace GitHub.Runner.Common.Tests.Worker
             TimelineReference timeline = new();
             Guid jobId = Guid.NewGuid();
             string jobName = "Summary Job";
-            var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+            var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
             jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
             {
                 Alias = Pipelines.PipelineConstants.SelfAlias,

src/Test/L0/Worker/ExecutionContextL0.cs

@@ -29,7 +29,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -106,7 +106,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -162,7 +162,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -216,7 +216,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -271,7 +271,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -322,7 +322,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -373,7 +373,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -471,7 +471,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -555,7 +555,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -610,7 +610,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -653,7 +653,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -717,7 +717,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -781,7 +781,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -969,7 +969,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -1014,7 +1014,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new TimelineReference();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -1057,7 +1057,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new TimelineReference();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,

src/Test/L0/Worker/JobExtensionL0.cs

@@ -4,6 +4,8 @@ using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Threading;
 using System.Threading.Tasks;
+using GitHub.DistributedTask.ObjectTemplating.Tokens;
+using GitHub.DistributedTask.Pipelines.ObjectTemplating;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Worker;
 using Moq;
@@ -25,6 +27,9 @@ namespace GitHub.Runner.Common.Tests.Worker
         private Mock<IContainerOperationProvider> _containerProvider;
         private Mock<IDiagnosticLogManager> _diagnosticLogManager;
         private Mock<IJobHookProvider> _jobHookProvider;
+        private Mock<ISnapshotOperationProvider> _snapshotOperationProvider;
+
+        private Pipelines.Snapshot _requestedSnapshot;
 
         private CancellationTokenSource _tokenSource;
         private TestHostContext CreateTestContext([CallerMemberName] String testName = "")
@@ -41,7 +46,16 @@ namespace GitHub.Runner.Common.Tests.Worker
             _directoryManager.Setup(x => x.PrepareDirectory(It.IsAny<IExecutionContext>(), It.IsAny<Pipelines.WorkspaceOptions>()))
                              .Returns(new TrackingConfig() { PipelineDirectory = "runner", WorkspaceDirectory = "runner/runner" });
             _jobHookProvider = new Mock<IJobHookProvider>();
+            _snapshotOperationProvider = new Mock<ISnapshotOperationProvider>();
 
+            _requestedSnapshot = null;
+            _snapshotOperationProvider
+                .Setup(p => p.CreateSnapshotRequestAsync(It.IsAny<IExecutionContext>(), It.IsAny<Pipelines.Snapshot>()))
+                .Returns((IExecutionContext _, object data) =>
+                {
+                    _requestedSnapshot = data as Pipelines.Snapshot;
+                    return Task.CompletedTask;
+                });
             IActionRunner step1 = new ActionRunner();
             IActionRunner step2 = new ActionRunner();
             IActionRunner step3 = new ActionRunner();
@@ -100,7 +114,7 @@ namespace GitHub.Runner.Common.Tests.Worker
             };
 
             Guid jobId = Guid.NewGuid();
-            _message = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "test", "test", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), steps, null, null, null, null);
+            _message = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "test", "test", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), steps, null, null, null, null, null);
             GitHubContext github = new();
             github["repository"] = new Pipelines.ContextData.StringContextData("actions/runner");
             github["secret_source"] = new Pipelines.ContextData.StringContextData("Actions");
@@ -125,6 +139,7 @@ namespace GitHub.Runner.Common.Tests.Worker
             hc.SetSingleton(_directoryManager.Object);
             hc.SetSingleton(_diagnosticLogManager.Object);
             hc.SetSingleton(_jobHookProvider.Object);
+            hc.SetSingleton(_snapshotOperationProvider.Object);
             hc.EnqueueInstance<IPagingLogger>(_logger.Object); // JobExecutionContext
             hc.EnqueueInstance<IPagingLogger>(_logger.Object); // job start hook
             hc.EnqueueInstance<IPagingLogger>(_logger.Object); // Initial Job
@@ -443,5 +458,80 @@ namespace GitHub.Runner.Common.Tests.Worker
                 Assert.Equal(0, _jobEc.PostJobSteps.Count);
             }
         }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public async Task EnsureNoSnapshotPostJobStep()
+        {
+            using (TestHostContext hc = CreateTestContext())
+            {
+                var jobExtension = new JobExtension();
+                jobExtension.Initialize(hc);
+
+                _actionManager.Setup(x => x.PrepareActionsAsync(It.IsAny<IExecutionContext>(), It.IsAny<IEnumerable<Pipelines.JobStep>>(), It.IsAny<Guid>()))
+                    .Returns(Task.FromResult(new PrepareResult(new List<JobExtensionRunner>(), new Dictionary<Guid, IActionRunner>())));
+
+                _message.Snapshot = null;
+                await jobExtension.InitializeJob(_jobEc, _message);
+
+                var postJobSteps = _jobEc.PostJobSteps;
+                Assert.Equal(0, postJobSteps.Count);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public Task EnsureSnapshotPostJobStepForStringToken()
+        {
+            var snapshot = new Pipelines.Snapshot("TestImageNameFromStringToken");
+            var imageNameValueStringToken = new StringToken(null, null, null, snapshot.ImageName);
+            return EnsureSnapshotPostJobStepForToken(imageNameValueStringToken, snapshot);
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public Task EnsureSnapshotPostJobStepForMappingToken()
+        {
+            var snapshot = new Pipelines.Snapshot("TestImageNameFromMappingToken");
+            var imageNameValueStringToken = new StringToken(null, null, null, snapshot.ImageName);
+            var mappingToken = new MappingToken(null, null, null)
+            {
+                { new StringToken(null,null,null, PipelineTemplateConstants.ImageName), imageNameValueStringToken }
+            };
+
+            return EnsureSnapshotPostJobStepForToken(mappingToken, snapshot);
+        }
+
+        private async Task EnsureSnapshotPostJobStepForToken(TemplateToken snapshotToken, Pipelines.Snapshot expectedSnapshot)
+        {
+            using (TestHostContext hc = CreateTestContext())
+            {
+                var jobExtension = new JobExtension();
+                jobExtension.Initialize(hc);
+
+                _actionManager.Setup(x => x.PrepareActionsAsync(It.IsAny<IExecutionContext>(), It.IsAny<IEnumerable<Pipelines.JobStep>>(), It.IsAny<Guid>()))
+                    .Returns(Task.FromResult(new PrepareResult(new List<JobExtensionRunner>(), new Dictionary<Guid, IActionRunner>())));
+
+                _message.Snapshot = snapshotToken;
+
+                await jobExtension.InitializeJob(_jobEc, _message);
+
+                var postJobSteps = _jobEc.PostJobSteps;
+
+                Assert.Equal(1, postJobSteps.Count);
+                var snapshotStep = postJobSteps.First();
+                Assert.Equal("Create custom image", snapshotStep.DisplayName);
+                Assert.Equal($"{PipelineTemplateConstants.Success}()", snapshotStep.Condition);
+
+                // Run the mock snapshot step, so we can verify it was executed with the expected snapshot object.
+                await snapshotStep.RunAsync();
+
+                Assert.NotNull(_requestedSnapshot);
+                Assert.Equal(expectedSnapshot.ImageName, _requestedSnapshot.ImageName);
+            }
+        }
     }
 }

src/Test/L0/Worker/JobRunnerL0.cs

@@ -101,6 +101,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 testName,
                 testName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null,
                 new ActionsEnvironmentReference("staging"),
+                null,
                 messageType: messageType);
             message.Variables[Constants.Variables.System.Culture] = "en-US";
             message.Resources.Endpoints.Add(new ServiceEndpoint()

src/Test/L0/Worker/SnapshotOperationProviderL0.cs

@@ -0,0 +1,78 @@
+#nullable enable
+using System;
+using System.IO;
+using System.Runtime.CompilerServices;
+using GitHub.DistributedTask.Pipelines;
+using GitHub.Runner.Sdk;
+using GitHub.Runner.Worker;
+using Moq;
+using Xunit;
+
+namespace GitHub.Runner.Common.Tests.Worker;
+
+public class SnapshotOperationProviderL0
+{
+    private Mock<IExecutionContext>? _ec;
+    private SnapshotOperationProvider? _snapshotOperationProvider;
+    private string? _snapshotRequestFilePath;
+    private string? _snapshotRequestDirectoryPath;
+
+    [Theory]
+    [InlineData(true)]
+    [InlineData(false)]
+    [Trait("Level", "L0")]
+    [Trait("Category", "Worker")]
+    public async void CreateSnapshotRequestAsync(bool shouldSnapshotDirectoryAlreadyExist)
+    {
+        using (TestHostContext testHostContext = CreateTestHostContext())
+        {
+            //Arrange
+            Setup(testHostContext, shouldSnapshotDirectoryAlreadyExist);
+            var expectedSnapshot = new Snapshot(Guid.NewGuid().ToString());
+
+            //Act
+            await _snapshotOperationProvider!.CreateSnapshotRequestAsync(_ec!.Object, expectedSnapshot);
+
+            //Assert
+            var actualSnapshot = IOUtil.LoadObject<Snapshot>(_snapshotRequestFilePath);
+            Assert.NotNull(actualSnapshot);
+            Assert.Equal(expectedSnapshot.ImageName, actualSnapshot!.ImageName);
+            _ec.Verify(ec => ec.Write(null, $"Request written to: {_snapshotRequestFilePath}"), Times.Once);
+            _ec.Verify(ec => ec.Write(null, "This request will be processed after the job completes. You will not receive any feedback on the snapshot process within the workflow logs of this job."), Times.Once);
+            _ec.Verify(ec => ec.Write(null, "If the snapshot process is successful, you should see a new image with the requested name in the list of available custom images when creating a new GitHub-hosted Runner."), Times.Once);
+            _ec.VerifyNoOtherCalls();
+        }
+    }
+
+    private void Setup(IHostContext hostContext, bool shouldSnapshotDirectoryAlreadyExist)
+    {
+        _ec = new Mock<IExecutionContext>();
+        _snapshotOperationProvider = new SnapshotOperationProvider();
+        _snapshotOperationProvider.Initialize(hostContext);
+        _snapshotRequestFilePath = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Root), ".snapshot", "request.json");
+        _snapshotRequestDirectoryPath = Path.GetDirectoryName(_snapshotRequestFilePath);
+
+        if (_snapshotRequestDirectoryPath != null)
+        {
+            // Clean up any existing the snapshot directory and its contents before starting the test. 
+            if (Directory.Exists(_snapshotRequestDirectoryPath))
+            {
+                Directory.Delete(_snapshotRequestDirectoryPath, true);
+            }
+
+            if (shouldSnapshotDirectoryAlreadyExist)
+            {
+                // Create a fresh snapshot directory if it's required for the test. 
+                Directory.CreateDirectory(_snapshotRequestDirectoryPath);
+            }
+        }
+    }
+
+    private TestHostContext CreateTestHostContext([CallerMemberName] string testName = "")
+    {
+        var testHostContext = new TestHostContext(this, testName);
+        _ec = new Mock<IExecutionContext>();
+        _ec.Object.Initialize(testHostContext);
+        return testHostContext;
+    }
+}

src/Test/L0/Worker/WorkerL0.cs

@@ -67,7 +67,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                     new Pipelines.ContextData.DictionaryContextData()
                 },
             };
-            var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, JobId, jobName, jobName, new StringToken(null, null, null, "ubuntu"), sidecarContainers, null, variables, new List<MaskHint>(), resources, context, null, actions, null, null, null, null);
+            var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, JobId, jobName, jobName, new StringToken(null, null, null, "ubuntu"), sidecarContainers, null, variables, new List<MaskHint>(), resources, context, null, actions, null, null, null, null, null);
             return jobRequest;
         }
 

src/dev.sh

@@ -17,7 +17,7 @@ LAYOUT_DIR="$SCRIPT_DIR/../_layout"
 DOWNLOAD_DIR="$SCRIPT_DIR/../_downloads/netcore2x"
 PACKAGE_DIR="$SCRIPT_DIR/../_package"
 DOTNETSDK_ROOT="$SCRIPT_DIR/../_dotnetsdk"
-DOTNETSDK_VERSION="6.0.418"
+DOTNETSDK_VERSION="6.0.421"
 DOTNETSDK_INSTALLDIR="$DOTNETSDK_ROOT/$DOTNETSDK_VERSION"
 RUNNER_VERSION=$(cat runnerversion)
 

src/global.json

@@ -1,5 +1,5 @@
 {
   "sdk": {
-    "version": "6.0.418"
+    "version": "6.0.421"
   }
 }

src/runnerversion

@@ -1 +1 @@
-2.313.0
+2.316.0