Release 2.315.0

.devcontainer/devcontainer.json

@@ -4,7 +4,7 @@
   "features": {
     "ghcr.io/devcontainers/features/docker-in-docker:1": {},
     "ghcr.io/devcontainers/features/dotnet": {
-      "version": "6.0.421"
+      "version": "6.0.420"
     },
     "ghcr.io/devcontainers/features/node:1": {
       "version": "16"

docs/checks/nodejs.md

@@ -4,9 +4,9 @@
 
 Make sure the built-in node.js has access to GitHub.com or GitHub Enterprise Server.
 
-The runner carries its own copy of node.js executable under `<runner_root>/externals/node20/`.
+The runner carries its own copy of node.js executable under `<runner_root>/externals/node16/`.
 
-All javascript base Actions will get executed by the built-in `node` at `<runner_root>/externals/node20/`.
+All javascript base Actions will get executed by the built-in `node` at `<runner_root>/externals/node16/`.
 
 > Not the `node` from `$PATH`
 

releaseNote.md

@@ -1,20 +1,33 @@
 ## What's Changed
+* fix summaries for actions results by @SrRyan in https://github.com/actions/runner/pull/3174
+* Bump runner version to match the latest patch release by @TingluoHuang in https://github.com/actions/runner/pull/3175
+* don't crash listener on getting job exceptions for run-service by @yaananth in https://github.com/actions/runner/pull/3177
+* Remove -f flag in wait when manually trap signal by @nikola-jokic in https://github.com/actions/runner/pull/3182
+* consume new pipelines service url in handlers by @patrickcarnahan in https://github.com/actions/runner/pull/3185
+* Add ability to enforce actions to run on node20 by @takost in https://github.com/actions/runner/pull/3192
+* Bump hook version to 0.6.0 by @nikola-jokic in https://github.com/actions/runner/pull/3203
+* Update dotnet sdk to latest version @6.0.420 by @github-actions in https://github.com/actions/runner/pull/3211
+* Bump docker version and docker buildx version by @nikola-jokic in https://github.com/actions/runner/pull/3208
+* Handle new non-retryable exception type by @thyeggman in https://github.com/actions/runner/pull/3191
+* Always Delete Actions Service Session by @luketomlinson in https://github.com/actions/runner/pull/3214
 
-- Preserve dates when deserializing job message from Run Service by @ericsciple in https://github.com/actions/runner/pull/3269
+## New Contributors
+* @SrRyan made their first contribution in https://github.com/actions/runner/pull/3174
+* @patrickcarnahan made their first contribution in https://github.com/actions/runner/pull/3185
 
-**Full Changelog**: https://github.com/actions/runner/compare/v2.316.0...v2.316.1
+**Full Changelog**: https://github.com/actions/runner/compare/v2.314.1...v2.315.0
+
+**Full Changelog**: https://github.com/actions/runner/compare/v2.313.0...v2.314.0
 
 _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.
 See https://docs.github.com/en/enterprise-cloud@latest/actions/hosting-your-own-runners/adding-self-hosted-runners_
 
 ## Windows x64
-
 We recommend configuring the runner in a root folder of the Windows drive (e.g. "C:\actions-runner"). This will help avoid issues related to service identity folder permissions and long file path restrictions on Windows.
 
 The following snipped needs to be run on `powershell`:
-
+``` powershell
-```powershell
 # Create a folder under the drive root
 mkdir \actions-runner ; cd \actions-runner
 # Download the latest runner package
@@ -25,14 +38,12 @@ Add-Type -AssemblyName System.IO.Compression.FileSystem ;
 ```
 
 ## [Pre-release] Windows arm64
-
 **Warning:** Windows arm64 runners are currently in preview status and use [unofficial versions of nodejs](https://unofficial-builds.nodejs.org/). They are not intended for production workflows.
 
 We recommend configuring the runner in a root folder of the Windows drive (e.g. "C:\actions-runner"). This will help avoid issues related to service identity folder permissions and long file path restrictions on Windows.
 
 The following snipped needs to be run on `powershell`:
-
+``` powershell
-```powershell
 # Create a folder under the drive root
 mkdir \actions-runner ; cd \actions-runner
 # Download the latest runner package
@@ -44,7 +55,7 @@ Add-Type -AssemblyName System.IO.Compression.FileSystem ;
 
 ## OSX x64
 
-```bash
+``` bash
 # Create a folder
 mkdir actions-runner && cd actions-runner
 # Download the latest runner package
@@ -55,7 +66,7 @@ tar xzf ./actions-runner-osx-x64-<RUNNER_VERSION>.tar.gz
 
 ## OSX arm64 (Apple silicon)
 
-```bash
+``` bash
 # Create a folder
 mkdir actions-runner && cd actions-runner
 # Download the latest runner package
@@ -66,7 +77,7 @@ tar xzf ./actions-runner-osx-arm64-<RUNNER_VERSION>.tar.gz
 
 ## Linux x64
 
-```bash
+``` bash
 # Create a folder
 mkdir actions-runner && cd actions-runner
 # Download the latest runner package
@@ -77,7 +88,7 @@ tar xzf ./actions-runner-linux-x64-<RUNNER_VERSION>.tar.gz
 
 ## Linux arm64
 
-```bash
+``` bash
 # Create a folder
 mkdir actions-runner && cd actions-runner
 # Download the latest runner package
@@ -88,7 +99,7 @@ tar xzf ./actions-runner-linux-arm64-<RUNNER_VERSION>.tar.gz
 
 ## Linux arm
 
-```bash
+``` bash
 # Create a folder
 mkdir actions-runner && cd actions-runner
 # Download the latest runner package
@@ -98,7 +109,6 @@ tar xzf ./actions-runner-linux-arm-<RUNNER_VERSION>.tar.gz
 ```
 
 ## Using your self hosted runner
-
 For additional details about configuring, running, or shutting down the runner please check out our [product docs.](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/adding-self-hosted-runners)
 
 ## SHA-256 Checksums

releaseVersion

@@ -1 +1 @@
-<Update to ./src/runnerversion when creating release>
+2.315.0

src/Misc/layoutbin/RunnerService.js

@@ -114,11 +114,6 @@ 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/layoutbin/runsvc.sh

@@ -10,7 +10,7 @@ if [ -f ".path" ]; then
     echo ".path=${PATH}"
 fi
 
-nodever=${GITHUB_ACTIONS_RUNNER_FORCED_NODE_VERSION:-node20}
+nodever=${GITHUB_ACTIONS_RUNNER_FORCED_NODE_VERSION:-node16}
 
 # insert anything to setup env when running as a service
 # run the host process which keep the listener alive

src/Misc/layoutbin/update.sh.template

@@ -135,17 +135,12 @@ if [[ "$currentplatform" == 'darwin'  && restartinteractiverunner -eq 0 ]]; then
     then
         # inspect the open file handles to find the node process
         # we can't actually inspect the process using ps because it uses relative paths and doesn't follow symlinks
-        nodever="node20"
+        nodever="node16"
         path=$(lsof -a -g "$procgroup" -F n | grep $nodever/bin/node | grep externals | tail -1 | cut -c2-)
-        if [[ $? -ne 0 || -z "$path" ]] # Fallback if RunnerService.js was started with node16
+        if [[ $? -ne 0 || -z "$path" ]] # Fallback if RunnerService.js was started with node12
         then
-            nodever="node16"
+            nodever="node12"
             path=$(lsof -a -g "$procgroup" -F n | grep $nodever/bin/node | grep externals | tail -1 | cut -c2-)
-            if [[ $? -ne 0 || -z "$path" ]] # Fallback if RunnerService.js was started with node12
-            then
-                nodever="node12"
-                path=$(lsof -a -g "$procgroup" -F n | grep $nodever/bin/node | grep externals | tail -1 | cut -c2-)
-            fi
         fi
         if [[ $? -eq 0 && -n "$path" ]]
         then

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

@@ -49,10 +49,5 @@ 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

@@ -70,9 +70,6 @@ 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/Runner.Common/ActionsRunServer.cs

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

src/Runner.Common/Constants.cs

@@ -153,7 +153,6 @@ 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
@@ -262,7 +261,7 @@ namespace GitHub.Runner.Common
             {
                 public static readonly string ToolsDirectory = "agent.ToolsDirectory";
 
-                // Set this env var to "node16" to downgrade the node version for internal functions (e.g hashfiles). This does NOT affect the version of node actions.
+                // Set this env var to "node12" to downgrade the node version for internal functions (e.g hashfiles). This does NOT affect the version of node actions.
                 public static readonly string ForcedInternalNodeVersion = "ACTIONS_RUNNER_FORCED_INTERNAL_NODE_VERSION";
                 public static readonly string ForcedActionsNodeVersion = "ACTIONS_RUNNER_FORCE_ACTIONS_NODE_VERSION";
                 public static readonly string PrintLogToStdout = "ACTIONS_RUNNER_PRINT_LOG_TO_STDOUT";

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);
+        void Start(Pipelines.AgentJobRequestMessage jobRequest, bool resultsServiceOnly = false, bool enableTelemetry = 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);
@@ -74,7 +74,6 @@ 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();
 
@@ -105,10 +104,11 @@ namespace GitHub.Runner.Common
             _resultsServer = hostContext.GetService<IResultsServer>();
         }
 
-        public void Start(Pipelines.AgentJobRequestMessage jobRequest, bool resultsServiceOnly = false)
+        public void Start(Pipelines.AgentJobRequestMessage jobRequest, bool resultsServiceOnly = false, bool enableTelemetry = false)
         {
             Trace.Entering();
             _resultsServiceOnly = resultsServiceOnly;
+            _enableTelemetry = enableTelemetry;
 
             var serviceEndPoint = jobRequest.Resources.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
 
@@ -139,12 +139,6 @@ 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.");
@@ -580,9 +574,9 @@ 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 && _resultsServiceExceptionsCount > 3)
+                            if (!_resultsServiceOnly)
                             {
                                 _resultsClientInitiated = false;
                                 SendResultsTelemetry(ex);

src/Runner.Common/Util/NodeUtil.cs

@@ -5,7 +5,7 @@ namespace GitHub.Runner.Common.Util
 {
     public static class NodeUtil
     {
-        private const string _defaultNodeVersion = "node20";
+        private const string _defaultNodeVersion = "node16";
         public static readonly ReadOnlyCollection<string> BuiltInNodeVersions = new(new[] { "node16", "node20" });
         public static string GetInternalNodeVersion()
         {

src/Runner.Listener/BrokerMessageListener.cs

@@ -42,7 +42,7 @@ namespace GitHub.Runner.Listener
             _brokerServer = HostContext.GetService<IBrokerServer>();
         }
 
-        public async Task<CreateSessionResult> CreateSessionAsync(CancellationToken token)
+        public async Task<Boolean> CreateSessionAsync(CancellationToken token)
         {
             Trace.Entering();
 
@@ -99,7 +99,7 @@ namespace GitHub.Runner.Listener
                         encounteringError = false;
                     }
 
-                    return CreateSessionResult.Success;
+                    return true;
                 }
                 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 CreateSessionResult.Failure;
+                            return false;
                         }
 
                         // Check whether we get 401 because the runner registration already removed by the service.
@@ -134,18 +134,14 @@ 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 CreateSessionResult.Failure;
+                            return false;
                         }
                     }
 
                     if (!IsSessionCreationExceptionRetriable(ex))
                     {
                         _term.WriteError($"Failed to create session. {ex.Message}");
-                        if (ex is TaskAgentSessionConflictException)
+                        return false;
-                        {
-                            return CreateSessionResult.SessionConflict;
-                        }
-                        return CreateSessionResult.Failure;
                     }
 
                     if (!encounteringError) //print the message only on the first error

src/Runner.Listener/JobDispatcher.cs

@@ -1155,13 +1155,18 @@ namespace GitHub.Runner.Listener
                 TimelineRecord jobRecord = timeline.Records.FirstOrDefault(x => x.Id == message.JobId && x.RecordType == "Job");
                 ArgUtil.NotNull(jobRecord, nameof(jobRecord));
 
+
                 jobRecord.ErrorCount++;
                 jobRecord.Issues.Add(issue);
 
-                Trace.Info("Mark the job as failed since the worker crashed");
+                if (message.Variables.TryGetValue("DistributedTask.MarkJobAsFailedOnWorkerCrash", out var markJobAsFailedOnWorkerCrash) &&
-                jobRecord.Result = TaskResult.Failed;
+                    StringUtil.ConvertToBoolean(markJobAsFailedOnWorkerCrash?.Value))
-                // 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);
             }

src/Runner.Listener/MessageListener.cs

@@ -18,17 +18,10 @@ using GitHub.Services.WebApi;
 
 namespace GitHub.Runner.Listener
 {
-    public enum CreateSessionResult
-    {
-        Success,
-        Failure,
-        SessionConflict
-    }
-
     [ServiceLocator(Default = typeof(MessageListener))]
     public interface IMessageListener : IRunnerService
     {
-        Task<CreateSessionResult> CreateSessionAsync(CancellationToken token);
+        Task<Boolean> CreateSessionAsync(CancellationToken token);
         Task DeleteSessionAsync();
         Task<TaskAgentMessage> GetNextMessageAsync(CancellationToken token);
         Task DeleteMessageAsync(TaskAgentMessage message);
@@ -66,7 +59,7 @@ namespace GitHub.Runner.Listener
             _brokerServer = hostContext.GetService<IBrokerServer>();
         }
 
-        public async Task<CreateSessionResult> CreateSessionAsync(CancellationToken token)
+        public async Task<Boolean> CreateSessionAsync(CancellationToken token)
         {
             Trace.Entering();
 
@@ -130,7 +123,7 @@ namespace GitHub.Runner.Listener
                         encounteringError = false;
                     }
 
-                    return CreateSessionResult.Success;
+                    return true;
                 }
                 catch (OperationCanceledException) when (token.IsCancellationRequested)
                 {
@@ -154,7 +147,7 @@ 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 CreateSessionResult.Failure;
+                            return false;
                         }
 
                         // Check whether we get 401 because the runner registration already removed by the service.
@@ -165,18 +158,14 @@ 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 CreateSessionResult.Failure;
+                            return false;
                         }
                     }
 
                     if (!IsSessionCreationExceptionRetriable(ex))
                     {
                         _term.WriteError($"Failed to create session. {ex.Message}");
-                        if (ex is TaskAgentSessionConflictException)
+                        return false;
-                        {
-                            return CreateSessionResult.SessionConflict;
-                        }
-                        return CreateSessionResult.Failure;
                     }
 
                     if (!encounteringError) //print the message only on the first error
@@ -236,7 +225,6 @@ 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();
@@ -315,7 +303,7 @@ 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) == CreateSessionResult.Success))
+                    if (ex is TaskAgentSessionExpiredException && !_settings.SkipSessionRecover && await CreateSessionAsync(token))
                     {
                         Trace.Info($"{nameof(TaskAgentSessionExpiredException)} received, recovered by recreate session.");
                     }
@@ -360,27 +348,16 @@ 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;
                 }
 

src/Runner.Listener/Runner.cs

@@ -359,12 +359,7 @@ namespace GitHub.Runner.Listener
             {
                 Trace.Info(nameof(RunAsync));
                 _listener = GetMesageListener(settings);
-                CreateSessionResult createSessionResult = await _listener.CreateSessionAsync(HostContext.RunnerShutdownToken);
+                if (!await _listener.CreateSessionAsync(HostContext.RunnerShutdownToken))
-                if (createSessionResult == CreateSessionResult.SessionConflict)
-                {
-                    return Constants.Runner.ReturnCode.SessionConflict;
-                }
-                else if (createSessionResult == CreateSessionResult.Failure)
                 {
                     return Constants.Runner.ReturnCode.TerminatedError;
                 }

src/Runner.Sdk/Util/IOUtil.cs

@@ -459,34 +459,6 @@ 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/WhichUtil.cs

@@ -7,6 +7,129 @@ 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

@@ -483,6 +483,10 @@ 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
@@ -793,39 +797,42 @@ namespace GitHub.Runner.Worker
             try
             {
                 var useActionArchiveCache = false;
-                var hasActionArchiveCache = false;
+                if (executionContext.Global.Variables.GetBoolean("DistributedTask.UseActionArchiveCache") == true)
-                var actionArchiveCacheDir = Environment.GetEnvironmentVariable(Constants.Variables.Agent.ActionArchiveCacheDirectory);
-                if (!string.IsNullOrEmpty(actionArchiveCacheDir) &&
-                    Directory.Exists(actionArchiveCacheDir))
                 {
-                    hasActionArchiveCache = true;
+                    var hasActionArchiveCache = false;
-                    Trace.Info($"Check if action archive '{downloadInfo.ResolvedNameWithOwner}@{downloadInfo.ResolvedSha}' already exists in cache directory '{actionArchiveCacheDir}'");
+                    var actionArchiveCacheDir = Environment.GetEnvironmentVariable(Constants.Variables.Agent.ActionArchiveCacheDirectory);
-#if OS_WINDOWS
+                    if (!string.IsNullOrEmpty(actionArchiveCacheDir) &&
-                    var cacheArchiveFile = Path.Combine(actionArchiveCacheDir, downloadInfo.ResolvedNameWithOwner.Replace(Path.DirectorySeparatorChar, '_').Replace(Path.AltDirectorySeparatorChar, '_'), $"{downloadInfo.ResolvedSha}.zip");
+                        Directory.Exists(actionArchiveCacheDir))
-#else
-                    var cacheArchiveFile = Path.Combine(actionArchiveCacheDir, downloadInfo.ResolvedNameWithOwner.Replace(Path.DirectorySeparatorChar, '_').Replace(Path.AltDirectorySeparatorChar, '_'), $"{downloadInfo.ResolvedSha}.tar.gz");
-#endif
-                    if (File.Exists(cacheArchiveFile))
                     {
-                        try
+                        hasActionArchiveCache = true;
+                        Trace.Info($"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");
+#else
+                        var cacheArchiveFile = Path.Combine(actionArchiveCacheDir, downloadInfo.ResolvedNameWithOwner.Replace(Path.DirectorySeparatorChar, '_').Replace(Path.AltDirectorySeparatorChar, '_'), $"{downloadInfo.ResolvedSha}.tar.gz");
+#endif
+                        if (File.Exists(cacheArchiveFile))
                         {
-                            Trace.Info($"Found action archive '{cacheArchiveFile}' in cache directory '{actionArchiveCacheDir}'");
+                            try
-                            File.Copy(cacheArchiveFile, archiveFile);
+                            {
-                            useActionArchiveCache = true;
+                                Trace.Info($"Found action archive '{cacheArchiveFile}' in cache directory '{actionArchiveCacheDir}'");
-                            executionContext.Debug($"Copied action archive '{cacheArchiveFile}' to '{archiveFile}'");
+                                File.Copy(cacheArchiveFile, archiveFile);
-                        }
+                                useActionArchiveCache = true;
-                        catch (Exception ex)
+                                executionContext.Debug($"Copied action archive '{cacheArchiveFile}' to '{archiveFile}'");
-                        {
+                            }
-                            Trace.Error($"Failed to copy action archive '{cacheArchiveFile}' to '{archiveFile}'. Error: {ex}");
+                            catch (Exception ex)
+                            {
+                                Trace.Error($"Failed to copy action archive '{cacheArchiveFile}' to '{archiveFile}'. Error: {ex}");
+                            }
                         }
                     }
-                }
 
-                executionContext.Global.JobTelemetry.Add(new JobTelemetry()
+                    executionContext.Global.JobTelemetry.Add(new JobTelemetry()
-                {
+                    {
-                    Type = JobTelemetryType.General,
+                        Type = JobTelemetryType.General,
-                    Message = $"Action archive cache usage: {downloadInfo.ResolvedNameWithOwner}@{downloadInfo.ResolvedSha} use cache {useActionArchiveCache} has cache {hasActionArchiveCache}"
+                        Message = $"Action archive cache usage: {downloadInfo.ResolvedNameWithOwner}@{downloadInfo.ResolvedSha} use cache {useActionArchiveCache} has cache {hasActionArchiveCache}"
-                });
+                    });
+                }
 
                 if (!useActionArchiveCache)
                 {
@@ -872,9 +879,16 @@ namespace GitHub.Runner.Worker
                     int exitCode = await processInvoker.ExecuteAsync(stagingDirectory, tar, $"-xzf \"{archiveFile}\"", null, executionContext.CancellationToken);
                     if (exitCode != 0)
                     {
-                        var fileInfo = new FileInfo(archiveFile);
+                        if (executionContext.Global.Variables.GetBoolean("DistributedTask.DetailUntarFailure") == true)
-                        var sha256hash = await IOUtil.GetFileContentSha256HashAsync(archiveFile);
+                        {
-                        throw new InvalidActionArchiveException($"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}.");
+                            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}.");
+                        }
                     }
                 }
 #endif
@@ -1018,6 +1032,13 @@ 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/DiagnosticLogManager.cs

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

src/Runner.Worker/ExecutionContext.cs

@@ -837,6 +837,7 @@ namespace GitHub.Runner.Worker
             // Actions environment
             ActionsEnvironment = message.ActionsEnvironment;
 
+
             // Service container info
             Global.ServiceContainers = new List<ContainerInfo>();
 

src/Runner.Worker/Handlers/ScriptHandler.cs

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

src/Runner.Worker/JobRunner.cs

@@ -42,7 +42,6 @@ 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.
@@ -55,6 +54,13 @@ 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))
             {
@@ -76,7 +82,7 @@ namespace GitHub.Runner.Worker
                     launchServer.InitializeLaunchClient(new Uri(launchReceiverEndpoint), accessToken);
                 }
                 _jobServerQueue = HostContext.GetService<IJobServerQueue>();
-                _jobServerQueue.Start(message, resultsServiceOnly: true);
+                _jobServerQueue.Start(message, resultsServiceOnly: true, enableTelemetry: jobServerQueueTelemetry);
             }
             else
             {
@@ -98,7 +104,7 @@ namespace GitHub.Runner.Worker
                 VssConnection jobConnection = VssUtil.CreateConnection(jobServerUrl, jobServerCredential, delegatingHandlers);
                 await jobServer.ConnectAsync(jobConnection);
 
-                _jobServerQueue.Start(message);
+                _jobServerQueue.Start(message, enableTelemetry: jobServerQueueTelemetry);
                 server = jobServer;
             }
 
@@ -158,6 +164,8 @@ 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))

src/Sdk/DTWebApi/WebApi/ActionsRunServerHttpClient.cs

@@ -1,95 +0,0 @@
-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/TaskAgentHttpClient.cs

@@ -141,6 +141,24 @@ 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/RunServiceHttpClient.cs

@@ -9,7 +9,6 @@ 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;
 
@@ -17,15 +16,6 @@ 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)
@@ -184,11 +174,5 @@ 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/Test/L0/Listener/BrokerMessageListenerL0.cs

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

src/Test/L0/Listener/MessageListenerL0.cs

@@ -75,11 +75,11 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                bool result = await listener.CreateSessionAsync(tokenSource.Token);
                 trace.Info("result: {0}", result);
 
                 // Assert.
-                Assert.Equal(CreateSessionResult.Success, result);
+                Assert.True(result);
                 _runnerServer
                     .Verify(x => x.CreateAgentSessionAsync(
                         _settings.PoolId,
@@ -135,11 +135,11 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                bool result = await listener.CreateSessionAsync(tokenSource.Token);
                 trace.Info("result: {0}", result);
 
                 // Assert.
-                Assert.Equal(CreateSessionResult.Success, result);
+                Assert.True(result);
 
                 _runnerServer
                     .Verify(x => x.CreateAgentSessionAsync(
@@ -185,8 +185,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                bool result = await listener.CreateSessionAsync(tokenSource.Token);
-                Assert.Equal(CreateSessionResult.Success, result);
+                Assert.True(result);
 
                 _runnerServer
                     .Setup(x => x.DeleteAgentSessionAsync(
@@ -245,10 +245,10 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                bool result = await listener.CreateSessionAsync(tokenSource.Token);
                 trace.Info("result: {0}", result);
 
-                Assert.Equal(CreateSessionResult.Success, result);
+                Assert.True(result);
 
                 _runnerServer
                     .Verify(x => x.CreateAgentSessionAsync(
@@ -309,8 +309,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                bool result = await listener.CreateSessionAsync(tokenSource.Token);
-                Assert.Equal(CreateSessionResult.Success, result);
+                Assert.True(result);
 
                 var arMessages = new TaskAgentMessage[]
                 {
@@ -390,8 +390,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                bool result = await listener.CreateSessionAsync(tokenSource.Token);
-                Assert.Equal(CreateSessionResult.Success, result);
+                Assert.True(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);
 
-                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                bool result = await listener.CreateSessionAsync(tokenSource.Token);
                 trace.Info("result: {0}", result);
 
                 // Assert.
-                Assert.Equal(CreateSessionResult.Success, result);
+                Assert.True(result);
                 _runnerServer
                     .Verify(x => x.CreateAgentSessionAsync(
                         _settings.PoolId,
@@ -541,8 +541,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 MessageListener listener = new();
                 listener.Initialize(tc);
 
-                CreateSessionResult result = await listener.CreateSessionAsync(tokenSource.Token);
+                bool result = await listener.CreateSessionAsync(tokenSource.Token);
-                Assert.Equal(CreateSessionResult.Success, result);
+                Assert.True(result);
 
                 _runnerServer
                     .Setup(x => x.GetAgentMessageAsync(

src/Test/L0/Listener/RunnerL0.cs

@@ -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<CreateSessionResult>(CreateSessionResult.Success));
+                    .Returns(Task.FromResult<bool>(true));
                 _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<CreateSessionResult>(CreateSessionResult.Failure));
+                    .Returns(Task.FromResult(false));
 
                 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<CreateSessionResult>(CreateSessionResult.Failure));
+                    .Returns(Task.FromResult(false));
 
                 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<CreateSessionResult>(CreateSessionResult.Success));
+                    .Returns(Task.FromResult<bool>(true));
                 _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<CreateSessionResult>(CreateSessionResult.Success));
+                    .Returns(Task.FromResult<bool>(true));
                 _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<CreateSessionResult>(CreateSessionResult.Success));
+                    .Returns(Task.FromResult<bool>(true));
                 _messageListener.Setup(x => x.GetNextMessageAsync(It.IsAny<CancellationToken>()))
                     .Returns(async () =>
                         {

src/Test/L0/Util/IOUtilL0.cs

@@ -960,33 +960,6 @@ 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

@@ -212,5 +212,210 @@ 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/ActionManagerL0.cs

@@ -382,6 +382,8 @@ runs:
                     }
                 };
 
+                _ec.Object.Global.Variables.Set("DistributedTask.UseActionArchiveCache", bool.TrueString);
+
                 //Act
                 await _actionManager.PrepareActionsAsync(_ec.Object, actions);
 
@@ -2373,6 +2375,10 @@ 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/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="6.0.421"
+DOTNETSDK_VERSION="6.0.420"
 DOTNETSDK_INSTALLDIR="$DOTNETSDK_ROOT/$DOTNETSDK_VERSION"
 RUNNER_VERSION=$(cat runnerversion)
 

src/global.json

@@ -1,5 +1,5 @@
 {
   "sdk": {
-    "version": "6.0.421"
+    "version": "6.0.420"
   }
 }

src/runnerversion

@@ -1 +1 @@
-2.316.1
+2.315.0