Upgrade dotnet sdk to v6.0.424

* Revert "Warn for soon to be deprecated OS versions (#3413)"

This reverts commit ae04147f96.

* Add .NET 8 OS compatibility test

* feedback

.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": "6.0.424"
     },
     "ghcr.io/devcontainers/features/node:1": {
       "version": "16"

.github/workflows/publish-image.yml

@@ -25,10 +25,12 @@ jobs:
       - name: Compute image version
         id: image
         uses: actions/github-script@v6
+        env:
+          RUNNER_VERSION: ${{ github.event.inputs.runnerVersion }}
         with:
           script: |
             const fs = require('fs');
-            const inputRunnerVersion = "${{ github.event.inputs.runnerVersion }}"
+            const inputRunnerVersion = process.env.RUNNER_VERSION;
             if (inputRunnerVersion) {
               console.log(`Using input runner version ${inputRunnerVersion}`)
               core.setOutput('version', inputRunnerVersion);

docs/start/envlinux.md

@@ -4,16 +4,7 @@
 
 ## Supported Distributions and Versions
 
-x64
+Please see "[Supported architectures and operating systems for self-hosted runners](https://docs.github.com/en/actions/hosting-your-own-runners/managing-self-hosted-runners/about-self-hosted-runners#linux)."
-  - Red Hat Enterprise Linux 7+
-  - CentOS 7+
-  - Oracle Linux 7+
-  - Fedora 29+
-  - Debian 9+
-  - Ubuntu 16.04+
-  - Linux Mint 18+
-  - openSUSE 15+
-  - SUSE Enterprise Linux (SLES) 12 SP2+
 
 ## Install .Net Core 3.x Linux Dependencies
 

docs/start/envosx.md

@@ -4,7 +4,6 @@
 
 ## Supported Versions
 
-  - macOS High Sierra (10.13) and later versions
+Please see "[Supported architectures and operating systems for self-hosted runners](https://docs.github.com/en/actions/hosting-your-own-runners/managing-self-hosted-runners/about-self-hosted-runners#macos)."
-  - x64 and arm64 (Apple Silicon)
 
 ## [More .Net Core Prerequisites Information](https://docs.microsoft.com/en-us/dotnet/core/macos-prerequisites?tabs=netcore30)

docs/start/envwin.md

@@ -2,11 +2,6 @@
 
 ## Supported Versions
 
- - Windows 7 64-bit
+Please see "[Supported architectures and operating systems for self-hosted runners](https://docs.github.com/en/actions/hosting-your-own-runners/managing-self-hosted-runners/about-self-hosted-runners#windows)."
- - Windows 8.1 64-bit
- - Windows 10 64-bit
- - Windows Server 2012 R2 64-bit
- - Windows Server 2016 64-bit
- - Windows Server 2019 64-bit
 
 ## [More .NET Core Prerequisites Information](https://docs.microsoft.com/en-us/dotnet/core/windows-prerequisites?tabs=netcore30)

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=0.6.0
+ARG RUNNER_CONTAINER_HOOKS_VERSION=0.6.1
-ARG DOCKER_VERSION=25.0.4
+ARG DOCKER_VERSION=27.1.1
-ARG BUILDX_VERSION=0.13.1
+ARG BUILDX_VERSION=0.16.2
 
 RUN apt update -y && apt install curl unzip -y
 
@@ -39,12 +39,15 @@ ENV RUNNER_MANUALLY_TRAP_SIG=1
 ENV ACTIONS_RUNNER_PRINT_LOG_TO_STDOUT=1
 ENV ImageOS=ubuntu22
 
-RUN apt-get update -y \
+# 'gpg-agent' and 'software-properties-common' are needed for the 'add-apt-repository' command that follows
-    && apt-get install -y --no-install-recommends \
+RUN apt update -y \
-    sudo \
+    && apt install -y --no-install-recommends sudo lsb-release gpg-agent software-properties-common \
-    lsb-release \
     && rm -rf /var/lib/apt/lists/*
 
+# Configure git-core/ppa based on guidance here:  https://git-scm.com/download/linux
+RUN add-apt-repository ppa:git-core/ppa \
+    && apt update -y
+
 RUN adduser --disabled-password --gecos "" --uid 1001 runner \
     && groupadd docker --gid 123 \
     && usermod -aG sudo runner \

releaseNote.md

@@ -1,28 +1,22 @@
 ## What's Changed
-* 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
+- .NET 8 OS compatibility test https://github.com/actions/runner/pull/3422
-* @eeSquared made their first contribution in https://github.com/actions/runner/pull/3215
+- Ignore ssl cert on websocket client https://github.com/actions/runner/pull/3423
-* @aiqiaoy made their first contribution in https://github.com/actions/runner/pull/3232
+- Revert "Bump runner to dotnet 8" https://github.com/actions/runner/pull/3412
 
-**Full Changelog**: https://github.com/actions/runner/compare/v2.315.0...v2.316.0
+**Full Changelog**: https://github.com/actions/runner/compare/v2.318.0...v2.319.0
 
 _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
@@ -33,12 +27,14 @@ 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
@@ -50,7 +46,7 @@ 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
@@ -61,7 +57,7 @@ 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
@@ -72,7 +68,7 @@ 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
@@ -83,7 +79,7 @@ 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
@@ -94,7 +90,7 @@ 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
@@ -104,6 +100,7 @@ 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

src/Misc/contentHash/dotnetRuntime/linux-arm

@@ -1 +0,0 @@
-54d95a44d118dba852395991224a6b9c1abe916858c87138656f80c619e85331

src/Misc/contentHash/dotnetRuntime/linux-arm64

@@ -1 +0,0 @@
-68015af17f06a824fa478e62ae7393766ce627fd5599ab916432a14656a19a52

src/Misc/contentHash/dotnetRuntime/linux-x64

@@ -1 +0,0 @@
-a2628119ca419cb54e279103ffae7986cdbd0814d57c73ff0dc74c38be08b9ae

src/Misc/contentHash/dotnetRuntime/osx-arm64

@@ -1 +0,0 @@
-de71ca09ead807e1a2ce9df0a5b23eb7690cb71fff51169a77e4c3992be53dda

src/Misc/contentHash/dotnetRuntime/osx-x64

@@ -1 +0,0 @@
-d009e05e6b26d614d65be736a15d1bd151932121c16a9ff1b986deadecc982b9

src/Misc/contentHash/dotnetRuntime/win-arm64

@@ -1 +0,0 @@
-f730db39c2305800b4653795360ba9c10c68f384a46b85d808f1f9f0ed3c42e4

src/Misc/contentHash/dotnetRuntime/win-x64

@@ -1 +0,0 @@
-a35b5722375490e9473cdcccb5e18b41eba3dbf4344fe31abc9821e21f18ea5a

src/Misc/contentHash/externals/linux-arm

@@ -1 +0,0 @@
-4bf3e1af0d482af1b2eaf9f08250248a8c1aea8ec20a3c5be116d58cdd930009

src/Misc/contentHash/externals/linux-arm64

@@ -1 +0,0 @@
-ec1719a8cb4d8687328aa64f4aa7c4e3498a715d8939117874782e3e6e63a14b

src/Misc/contentHash/externals/linux-x64

@@ -1 +0,0 @@
-50538de29f173bb73f708c4ed2c8328a62b8795829b97b2a6cb57197e2305287

src/Misc/contentHash/externals/osx-arm64

@@ -1 +0,0 @@
-a0a96cbb7593643b69e669bf14d7b29b7f27800b3a00bb3305aebe041456c701

src/Misc/contentHash/externals/osx-x64

@@ -1 +0,0 @@
-6255b22692779467047ecebd60ad46984866d75cdfe10421d593a7b51d620b09

src/Misc/contentHash/externals/win-arm64

@@ -1 +0,0 @@
-6ff1abd055dc35bfbf06f75c2f08908f660346f66ad1d8f81c910068e9ba029d

src/Misc/contentHash/externals/win-x64

@@ -1 +0,0 @@
-433a6d748742d12abd20dc2a79b62ac3d9718ae47ef26f8e84dc8c180eea3659

src/Misc/externals.sh

@@ -5,10 +5,11 @@ PRECACHE=$2
 NODE_URL=https://nodejs.org/dist
 UNOFFICIAL_NODE_URL=https://unofficial-builds.nodejs.org/download/release
 NODE_ALPINE_URL=https://github.com/actions/alpine_nodejs/releases/download
+# When you update Node versions you must also create a new release of alpine_nodejs at that updated version.
+# Follow the instructions here: https://github.com/actions/alpine_nodejs?tab=readme-ov-file#getting-started
 NODE16_VERSION="16.20.2"
-NODE20_VERSION="20.8.1"
+NODE20_VERSION="20.13.1"
-# used only for win-arm64, remove node16 unofficial version when official version is available
+NODE16_UNOFFICIAL_VERSION="16.20.0" # used only for win-arm64, remove node16 unofficial version when official version is available
-NODE16_UNOFFICIAL_VERSION="16.20.0"
 
 get_abs_path() {
   # exploits the fact that pwd will print abs path when no args

src/Runner.Common/Constants.cs

@@ -181,7 +181,7 @@ 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 EnforcedNode16DetectedAfterEndOfLife = "The following actions use a deprecated Node.js version 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";
 
         }
@@ -280,6 +280,8 @@ namespace GitHub.Runner.Common
                 public static readonly string PhaseDisplayName = "system.phaseDisplayName";
                 public static readonly string JobRequestType = "system.jobRequestType";
                 public static readonly string OrchestrationId = "system.orchestrationId";
+                public static readonly string TestDotNet8Compatibility = "system.testDotNet8Compatibility";
+                public static readonly string DotNet8CompatibilityWarning = "system.dotNet8CompatibilityWarning";
             }
         }
 

src/Runner.Common/JobServer.cs

@@ -4,6 +4,7 @@ using System.IO;
 using System.Linq;
 using System.Net.Http;
 using System.Net.Http.Headers;
+using System.Net.Security;
 using System.Net.WebSockets;
 using System.Text;
 using System.Threading;
@@ -179,6 +180,10 @@ namespace GitHub.Runner.Common
                     userAgentValues.AddRange(UserAgentUtility.GetDefaultRestUserAgent());
                     userAgentValues.AddRange(HostContext.UserAgents);
                     this._websocketClient.Options.SetRequestHeader("User-Agent", string.Join(" ", userAgentValues.Select(x => x.ToString())));
+                    if (StringUtil.ConvertToBoolean(Environment.GetEnvironmentVariable("GITHUB_ACTIONS_RUNNER_TLS_NO_VERIFY")))
+                    {
+                        this._websocketClient.Options.RemoteCertificateValidationCallback = (_, _, _, _) => true;
+                    }
 
                     this._websocketConnectTask = ConnectWebSocketClient(feedStreamUrl, delay);
                 }

src/Runner.Common/JobServerQueue.cs

@@ -613,7 +613,7 @@ namespace GitHub.Runner.Common
 
         private void SendResultsTelemetry(Exception ex)
         {
-            var issue = new Issue() { Type = IssueType.Warning, Message = $"Caught exception with results. {ex.Message}" };
+            var issue = new Issue() { Type = IssueType.Warning, Message = $"Caught exception with results. {HostContext.SecretMasker.MaskSecrets(ex.Message)}" };
             issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.ResultsUploadFailure;
 
             var telemetryRecord = new TimelineRecord()
@@ -709,7 +709,9 @@ namespace GitHub.Runner.Common
                             {
                                 Trace.Info("Catch exception during update steps, skip update Results.");
                                 Trace.Error(e);
-                                if (!_resultsServiceOnly)
+                                _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)
                                 {
                                     _resultsClientInitiated = false;
                                     SendResultsTelemetry(e);

src/Runner.Common/RunServer.cs

@@ -62,7 +62,10 @@ namespace GitHub.Runner.Common
             CheckConnection();
             return RetryRequest<AgentJobRequestMessage>(
                 async () => await _runServiceHttpClient.GetJobMessageAsync(requestUri, id, VarUtil.OS, cancellationToken), cancellationToken,
-                shouldRetry: ex => ex is not TaskOrchestrationJobAlreadyAcquiredException);
+                shouldRetry: ex =>
+                    ex is not TaskOrchestrationJobNotFoundException &&          // HTTP status 404
+                    ex is not TaskOrchestrationJobAlreadyAcquiredException &&   // HTTP status 409
+                    ex is not TaskOrchestrationJobUnprocessableException);      // HTTP status 422
         }
 
         public Task CompleteJobAsync(

src/Runner.Listener/ErrorThrottler.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Services.Common;
+
+namespace GitHub.Runner.Listener
+{
+    [ServiceLocator(Default = typeof(ErrorThrottler))]
+    public interface IErrorThrottler : IRunnerService
+    {
+        void Reset();
+        Task IncrementAndWaitAsync(CancellationToken token);
+    }
+
+    public sealed class ErrorThrottler : RunnerService, IErrorThrottler
+    {
+        internal static readonly TimeSpan MinBackoff = TimeSpan.FromSeconds(1);
+        internal static readonly TimeSpan MaxBackoff = TimeSpan.FromMinutes(1);
+        internal static readonly TimeSpan BackoffCoefficient = TimeSpan.FromSeconds(1);
+        private int _count = 0;
+
+        public void Reset()
+        {
+            _count = 0;
+        }
+
+        public async Task IncrementAndWaitAsync(CancellationToken token)
+        {
+            if (++_count <= 1)
+            {
+                return;
+            }
+
+            TimeSpan backoff = BackoffTimerHelper.GetExponentialBackoff(
+                attempt: _count - 2, // 0-based attempt
+                minBackoff: MinBackoff,
+                maxBackoff: MaxBackoff,
+                deltaBackoff: BackoffCoefficient);
+            Trace.Warning($"Back off {backoff.TotalSeconds} seconds before next attempt. Current consecutive error count: {_count}");
+            await HostContext.Delay(backoff, token);
+        }
+    }
+}

src/Runner.Listener/Runner.cs

@@ -32,10 +32,25 @@ namespace GitHub.Runner.Listener
         private bool _inConfigStage;
         private ManualResetEvent _completedCommand = new(false);
 
+        // <summary>
+        // Helps avoid excessive calls to Run Service when encountering non-retriable errors from /acquirejob.
+        // Normally we rely on the HTTP clients to back off between retry attempts. However, acquiring a job
+        // involves calls to both Run Serivce and Broker. And Run Service and Broker communicate with each other
+        // in an async fashion.
+        //
+        // When Run Service encounters a non-retriable error, it sends an async message to Broker. The runner will,
+        // however, immediately call Broker to get the next message. If the async event from Run Service to Broker
+        // has not yet been processed, the next message from Broker may be the same job message.
+        //
+        // The error throttler helps us back off when encountering successive, non-retriable errors from /acquirejob.
+        // </summary>
+        private IErrorThrottler _acquireJobThrottler;
+
         public override void Initialize(IHostContext hostContext)
         {
             base.Initialize(hostContext);
             _term = HostContext.GetService<ITerminal>();
+            _acquireJobThrottler = HostContext.CreateService<IErrorThrottler>();
         }
 
         public async Task<int> ExecuteCommand(CommandSettings command)
@@ -563,13 +578,16 @@ namespace GitHub.Runner.Listener
                                         await runServer.ConnectAsync(new Uri(messageRef.RunServiceUrl), creds);
                                         try
                                         {
-                                            jobRequestMessage =
+                                            jobRequestMessage = await runServer.GetJobMessageAsync(messageRef.RunnerRequestId, messageQueueLoopTokenSource.Token);
-                                            await runServer.GetJobMessageAsync(messageRef.RunnerRequestId,
+                                            _acquireJobThrottler.Reset();
-                                            messageQueueLoopTokenSource.Token);
                                         }
-                                        catch (TaskOrchestrationJobAlreadyAcquiredException)
+                                        catch (Exception ex) when (
+                                            ex is TaskOrchestrationJobNotFoundException ||          // HTTP status 404
+                                            ex is TaskOrchestrationJobAlreadyAcquiredException ||   // HTTP status 409
+                                            ex is TaskOrchestrationJobUnprocessableException)       // HTTP status 422
                                         {
-                                            Trace.Info("Job is already acquired, skip this message.");
+                                            Trace.Info($"Skipping message Job. {ex.Message}");
+                                            await _acquireJobThrottler.IncrementAndWaitAsync(messageQueueLoopTokenSource.Token);
                                             continue;
                                         }
                                         catch (Exception ex)

src/Runner.Worker/JobExtension.cs

@@ -127,6 +127,10 @@ namespace GitHub.Runner.Worker
                         }
                     }
 
+                    // Check OS warning
+                    var osWarningChecker = HostContext.GetService<IOSWarningChecker>();
+                    await osWarningChecker.CheckOSAsync(context);
+
                     try
                     {
                         var tokenPermissions = jobContext.Global.Variables.Get("system.github.token.permissions") ?? "";

src/Runner.Worker/OSWarningChecker.cs

@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+
+namespace GitHub.Runner.Worker
+{
+    [ServiceLocator(Default = typeof(OSWarningChecker))]
+    public interface IOSWarningChecker : IRunnerService
+    {
+        Task CheckOSAsync(IExecutionContext context);
+    }
+
+    public sealed class OSWarningChecker : RunnerService, IOSWarningChecker
+    {
+        public async Task CheckOSAsync(IExecutionContext context)
+        {
+            ArgUtil.NotNull(context, nameof(context));
+            if (!context.Global.Variables.System_TestDotNet8Compatibility)
+            {
+                return;
+            }
+
+            context.Output("Testing runner upgrade compatibility");
+            List<string> output = new();
+            object outputLock = new();
+            try
+            {
+                using (var process = HostContext.CreateService<IProcessInvoker>())
+                {
+                    process.OutputDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stdout)
+                    {
+                        if (!string.IsNullOrEmpty(stdout.Data))
+                        {
+                            lock (outputLock)
+                            {
+                                output.Add(stdout.Data);
+                                Trace.Info(stdout.Data);
+                            }
+                        }
+                    };
+
+                    process.ErrorDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stderr)
+                    {
+                        if (!string.IsNullOrEmpty(stderr.Data))
+                        {
+                            lock (outputLock)
+                            {
+                                output.Add(stderr.Data);
+                                Trace.Error(stderr.Data);
+                            }
+                        }
+                    };
+
+                    using (var cancellationTokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(10)))
+                    {
+                        int exitCode = await process.ExecuteAsync(
+                            workingDirectory: HostContext.GetDirectory(WellKnownDirectory.Root),
+                            fileName: Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Bin), "testDotNet8Compatibility", $"TestDotNet8Compatibility{IOUtil.ExeExtension}"),
+                            arguments: string.Empty,
+                            environment: null,
+                            cancellationToken: cancellationTokenSource.Token);
+
+                        var outputStr = string.Join("\n", output).Trim();
+                        if (exitCode != 0 || !string.Equals(outputStr, "Hello from .NET 8!", StringComparison.Ordinal))
+                        {
+                            var warningMessage = context.Global.Variables.System_DotNet8CompatibilityWarning;
+                            if (!string.IsNullOrEmpty(warningMessage))
+                            {
+                                context.Warning(warningMessage);
+                            }
+
+                            context.Global.JobTelemetry.Add(new JobTelemetry() { Type = JobTelemetryType.General, Message = $".NET 8 OS compatibility test failed with exit code '{exitCode}' and output: {GetShortOutput(output)}" });
+                        }
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Trace.Error("An error occurred while testing .NET 8 compatibility'");
+                Trace.Error(ex);
+                context.Global.JobTelemetry.Add(new JobTelemetry() { Type = JobTelemetryType.General, Message = $".NET 8 OS compatibility test encountered exception type '{ex.GetType().FullName}', message: '{ex.Message}', process output: '{GetShortOutput(output)}'" });
+            }
+        }
+
+        private static string GetShortOutput(List<string> output)
+        {
+            var outputStr = string.Join("\n", output).Trim();
+            return outputStr.Length > 200 ? string.Concat(outputStr.Substring(0, 200), "[...]") : outputStr;
+        }
+    }
+}

src/Runner.Worker/Variables.cs

@@ -72,8 +72,12 @@ namespace GitHub.Runner.Worker
 
         public bool? Step_Debug => GetBoolean(Constants.Variables.Actions.StepDebug);
 
+        public string System_DotNet8CompatibilityWarning => Get(Constants.Variables.System.DotNet8CompatibilityWarning);
+
         public string System_PhaseDisplayName => Get(Constants.Variables.System.PhaseDisplayName);
 
+        public bool System_TestDotNet8Compatibility => GetBoolean(Constants.Variables.System.TestDotNet8Compatibility) ?? false;
+
         public string Get(string name)
         {
             Variable variable;

src/Sdk/DTWebApi/WebApi/Exceptions.cs

@@ -1539,6 +1539,26 @@ namespace GitHub.DistributedTask.WebApi
         }
     }
 
+    [Serializable]
+    [ExceptionMapping("0.0", "3.0", "TaskOrchestrationJobUnprocessableException", "GitHub.DistributedTask.WebApi.TaskOrchestrationJobUnprocessableException, GitHub.DistributedTask.WebApi, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
+    public sealed class TaskOrchestrationJobUnprocessableException : DistributedTaskException
+    {
+        public TaskOrchestrationJobUnprocessableException(String message)
+            : base(message)
+        {
+        }
+
+        public TaskOrchestrationJobUnprocessableException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        private TaskOrchestrationJobUnprocessableException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
     [Serializable]
     [ExceptionMapping("0.0", "3.0", "TaskOrchestrationPlanSecurityException", "GitHub.DistributedTask.WebApi.TaskOrchestrationPlanSecurityException, GitHub.DistributedTask.WebApi, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
     public sealed class TaskOrchestrationPlanSecurityException : DistributedTaskException

src/Sdk/RSWebApi/Contracts/RunServiceError.cs

@@ -0,0 +1,17 @@
+using System.Runtime.Serialization;
+
+namespace GitHub.Actions.RunService.WebApi
+{
+    [DataContract]
+    public class RunServiceError
+    {
+        [DataMember(Name = "source", EmitDefaultValue = false)]
+        public string Source { get; set; }
+
+        [DataMember(Name = "statusCode", EmitDefaultValue = false)]
+        public int Code { get; set; }
+
+        [DataMember(Name = "errorMessage", EmitDefaultValue = false)]
+        public string Message { get; set; }
+    }
+}

src/Sdk/RSWebApi/RunServiceHttpClient.cs

@@ -86,6 +86,7 @@ namespace GitHub.Actions.RunService.WebApi
                 httpMethod,
                 requestUri: requestUri,
                 content: requestContent,
+                readErrorBody: true,
                 cancellationToken: cancellationToken);
 
             if (result.IsSuccess)
@@ -93,14 +94,35 @@ namespace GitHub.Actions.RunService.WebApi
                 return result.Value;
             }
 
+            if (TryParseErrorBody(result.ErrorBody, out RunServiceError error))
+            {
+                switch ((HttpStatusCode)error.Code)
+                {
+                    case HttpStatusCode.NotFound:
+                        throw new TaskOrchestrationJobNotFoundException($"Job message not found '{messageId}'. {error.Message}");
+                    case HttpStatusCode.Conflict:
+                        throw new TaskOrchestrationJobAlreadyAcquiredException($"Job message already acquired '{messageId}'. {error.Message}");
+                    case HttpStatusCode.UnprocessableEntity:
+                        throw new TaskOrchestrationJobUnprocessableException($"Unprocessable job '{messageId}'. {error.Message}");
+                }
+            }
+
+            // Temporary back compat
             switch (result.StatusCode)
             {
                 case HttpStatusCode.NotFound:
                     throw new TaskOrchestrationJobNotFoundException($"Job message not found: {messageId}");
                 case HttpStatusCode.Conflict:
                     throw new TaskOrchestrationJobAlreadyAcquiredException($"Job message already acquired: {messageId}");
-                default:
+            }
-                    throw new Exception($"Failed to get job message: {result.Error}");
+
+            if (!string.IsNullOrEmpty(result.ErrorBody))
+            {
+                throw new Exception($"Failed to get job message: {result.Error}. {Truncate(result.ErrorBody)}");
+            }
+            else
+            {
+                throw new Exception($"Failed to get job message: {result.Error}");
             }
         }
 
@@ -108,7 +130,7 @@ namespace GitHub.Actions.RunService.WebApi
             Uri requestUri,
             Guid planId,
             Guid jobId,
-            TaskResult result,
+            TaskResult conclusion,
             Dictionary<String, VariableValue> outputs,
             IList<StepResult> stepResults,
             IList<Annotation> jobAnnotations,
@@ -120,7 +142,7 @@ namespace GitHub.Actions.RunService.WebApi
             {
                 PlanID = planId,
                 JobID = jobId,
-                Conclusion = result,
+                Conclusion = conclusion,
                 Outputs = outputs,
                 StepResults = stepResults,
                 Annotations = jobAnnotations,
@@ -130,22 +152,39 @@ namespace GitHub.Actions.RunService.WebApi
             requestUri = new Uri(requestUri, "completejob");
 
             var requestContent = new ObjectContent<CompleteJobRequest>(payload, new VssJsonMediaTypeFormatter(true));
-            var response = await SendAsync(
+            var result = await Send2Async(
                     httpMethod,
                     requestUri,
                     content: requestContent,
                     cancellationToken: cancellationToken);
-            if (response.IsSuccessStatusCode)
+            if (result.IsSuccess)
             {
                 return;
             }
 
-            switch (response.StatusCode)
+            if (TryParseErrorBody(result.ErrorBody, out RunServiceError error))
+            {
+                switch ((HttpStatusCode)error.Code)
+                {
+                    case HttpStatusCode.NotFound:
+                        throw new TaskOrchestrationJobNotFoundException($"Job not found: {jobId}. {error.Message}");
+                }
+            }
+
+            // Temporary back compat
+            switch (result.StatusCode)
             {
                 case HttpStatusCode.NotFound:
                     throw new TaskOrchestrationJobNotFoundException($"Job not found: {jobId}");
-                default:
+            }
-                    throw new Exception($"Failed to complete job: {response.ReasonPhrase}");
+
+            if (!string.IsNullOrEmpty(result.ErrorBody))
+            {
+                throw new Exception($"Failed to complete job: {result.Error}. {Truncate(result.ErrorBody)}");
+            }
+            else
+            {
+                throw new Exception($"Failed to complete job: {result.Error}");
             }
         }
 
@@ -169,6 +208,7 @@ namespace GitHub.Actions.RunService.WebApi
                 httpMethod,
                 requestUri,
                 content: requestContent,
+                readErrorBody: true,
                 cancellationToken: cancellationToken);
 
             if (result.IsSuccess)
@@ -176,12 +216,29 @@ namespace GitHub.Actions.RunService.WebApi
                 return result.Value;
             }
 
+            if (TryParseErrorBody(result.ErrorBody, out RunServiceError error))
+            {
+                switch ((HttpStatusCode)error.Code)
+                {
+                    case HttpStatusCode.NotFound:
+                        throw new TaskOrchestrationJobNotFoundException($"Job not found: {jobId}. {error.Message}");
+                }
+            }
+
+            // Temporary back compat
             switch (result.StatusCode)
             {
                 case HttpStatusCode.NotFound:
                     throw new TaskOrchestrationJobNotFoundException($"Job not found: {jobId}");
-                default:
+            }
-                    throw new Exception($"Failed to renew job: {result.Error}");
+
+            if (!string.IsNullOrEmpty(result.ErrorBody))
+            {
+                throw new Exception($"Failed to renew job: {result.Error}. {Truncate(result.ErrorBody)}");
+            }
+            else
+            {
+                throw new Exception($"Failed to renew job: {result.Error}");
             }
         }
 
@@ -190,5 +247,36 @@ namespace GitHub.Actions.RunService.WebApi
             var json = await response.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
             return JsonConvert.DeserializeObject<T>(json, s_serializerSettings);
         }
+
+        private static bool TryParseErrorBody(string errorBody, out RunServiceError error)
+        {
+            if (!string.IsNullOrEmpty(errorBody))
+            {
+                try
+                {
+                    error = JsonUtility.FromString<RunServiceError>(errorBody);
+                    if (error?.Source == "actions-run-service")
+                    {
+                        return true;
+                    }
+                }
+                catch (Exception)
+                {
+                }
+            }
+
+            error = null;
+            return false;
+        }
+
+        private static string Truncate(string errorBody)
+        {
+            if (errorBody.Length > 100)
+            {
+                return errorBody.Substring(0, 100) + "[truncated]";
+            }
+
+            return errorBody;
+        }
     }
 }

src/Sdk/WebApi/WebApi/RawHttpClientBase.cs

@@ -101,7 +101,7 @@ namespace Sdk.WebApi.WebApi
             }
         }
 
-        protected Task<RawHttpClientResult<T>> SendAsync<T>(
+        protected async Task<RawHttpClientResult> Send2Async(
             HttpMethod method,
             Uri requestUri,
             HttpContent content = null,
@@ -109,7 +109,47 @@ namespace Sdk.WebApi.WebApi
             Object userState = null,
             CancellationToken cancellationToken = default(CancellationToken))
         {
-            return SendAsync<T>(method, null, requestUri, content, queryParameters, userState, cancellationToken);
+            using (var response = await SendAsync(method, requestUri, content, queryParameters, userState, cancellationToken).ConfigureAwait(false))
+            {
+                if (response.IsSuccessStatusCode)
+                {
+                    return new RawHttpClientResult(
+                        isSuccess: true,
+                        error: string.Empty,
+                        statusCode: response.StatusCode);
+                }
+                else
+                {
+                    var errorBody = default(string);
+                    try
+                    {
+                        errorBody = await response.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
+                    }
+                    catch (Exception ex)
+                    {
+                        errorBody = $"Error reading HTTP response body: {ex.Message}";
+                    }
+
+                    string errorMessage = $"Error: {response.ReasonPhrase}";
+                    return new RawHttpClientResult(
+                        isSuccess: false,
+                        error: errorMessage,
+                        statusCode: response.StatusCode,
+                        errorBody: errorBody);
+                }
+            }
+        }
+
+        protected Task<RawHttpClientResult<T>> SendAsync<T>(
+            HttpMethod method,
+            Uri requestUri,
+            HttpContent content = null,
+            IEnumerable<KeyValuePair<String, String>> queryParameters = null,
+            Boolean readErrorBody = false,
+            Object userState = null,
+            CancellationToken cancellationToken = default(CancellationToken))
+        {
+            return SendAsync<T>(method, null, requestUri, content, queryParameters, readErrorBody, userState, cancellationToken);
         }
 
         protected async Task<RawHttpClientResult<T>> SendAsync<T>(
@@ -118,18 +158,20 @@ namespace Sdk.WebApi.WebApi
             Uri requestUri,
             HttpContent content = null,
             IEnumerable<KeyValuePair<String, String>> queryParameters = null,
+            Boolean readErrorBody = false,
             Object userState = null,
             CancellationToken cancellationToken = default(CancellationToken))
         {
             using (VssTraceActivity.GetOrCreate().EnterCorrelationScope())
             using (HttpRequestMessage requestMessage = CreateRequestMessage(method, additionalHeaders, requestUri, content, queryParameters))
             {
-                return await SendAsync<T>(requestMessage, userState, cancellationToken).ConfigureAwait(false);
+                return await SendAsync<T>(requestMessage, readErrorBody, userState, cancellationToken).ConfigureAwait(false);
             }
         }
 
         protected async Task<RawHttpClientResult<T>> SendAsync<T>(
             HttpRequestMessage message,
+            Boolean readErrorBody = false,
             Object userState = null,
             CancellationToken cancellationToken = default(CancellationToken))
         {
@@ -145,8 +187,21 @@ namespace Sdk.WebApi.WebApi
                 }
                 else
                 {
+                    var errorBody = default(string);
+                    if (readErrorBody)
+                    {
+                        try
+                        {
+                            errorBody = await response.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
+                        }
+                        catch (Exception ex)
+                        {
+                            errorBody = $"Error reading HTTP response body: {ex.Message}";
+                        }
+                    }
+
                     string errorMessage = $"Error: {response.ReasonPhrase}";
-                    return RawHttpClientResult<T>.Fail(errorMessage, response.StatusCode);
+                    return RawHttpClientResult<T>.Fail(errorMessage, response.StatusCode, errorBody);
                 }
             }
         }

src/Sdk/WebApi/WebApi/RawHttpClientResult.cs

@@ -5,15 +5,27 @@ namespace Sdk.WebApi.WebApi
     public class RawHttpClientResult
     {
         public bool IsSuccess { get; protected set; }
+
+        /// <summary>
+        /// A description of the HTTP status code, like "Error: Unprocessable Entity"
+        /// </summary>
         public string Error { get; protected set; }
+
+        /// <summary>
+        /// The HTTP response body for unsuccessful HTTP status codes, or an error message when reading the response body fails.
+        /// </summary>
+        public string ErrorBody { get; protected set; }
+
         public HttpStatusCode StatusCode { get; protected set; }
+
         public bool IsFailure => !IsSuccess;
 
-        protected RawHttpClientResult(bool isSuccess, string error, HttpStatusCode statusCode)
+        public RawHttpClientResult(bool isSuccess, string error, HttpStatusCode statusCode, string errorBody = null)
         {
             IsSuccess = isSuccess;
             Error = error;
             StatusCode = statusCode;
+            ErrorBody = errorBody;
         }
     }
 
@@ -21,13 +33,13 @@ namespace Sdk.WebApi.WebApi
     {
         public T Value { get; private set; }
 
-        protected internal RawHttpClientResult(T value, bool isSuccess, string error, HttpStatusCode statusCode)
+        protected internal RawHttpClientResult(T value, bool isSuccess, string error, HttpStatusCode statusCode, string errorBody)
-            : base(isSuccess, error, statusCode)
+            : base(isSuccess, error, statusCode, errorBody)
         {
             Value = value;
         }
 
-        public static RawHttpClientResult<T> Fail(string message, HttpStatusCode statusCode) => new RawHttpClientResult<T>(default(T), false, message, statusCode);
+        public static RawHttpClientResult<T> Fail(string message, HttpStatusCode statusCode, string errorBody) => new RawHttpClientResult<T>(default(T), false, message, statusCode, errorBody);
-        public static RawHttpClientResult<T> Ok(T value) => new RawHttpClientResult<T>(value, true, string.Empty, HttpStatusCode.OK);
+        public static RawHttpClientResult<T> Ok(T value) => new RawHttpClientResult<T>(value, true, string.Empty, HttpStatusCode.OK, null);
     }
 }

src/Test/L0/CommandLineParserL0.cs

@@ -68,7 +68,7 @@ namespace GitHub.Runner.Common.Tests
                 trace.Info("Parsed");
 
                 trace.Info("Commands: {0}", clp.Commands.Count);
-                Assert.True(clp.Commands.Count == 2);
+                Assert.Equal(2, clp.Commands.Count);
             }
         }
 
@@ -88,7 +88,7 @@ namespace GitHub.Runner.Common.Tests
                 trace.Info("Parsed");
 
                 trace.Info("Args: {0}", clp.Args.Count);
-                Assert.True(clp.Args.Count == 2);
+                Assert.Equal(2, clp.Args.Count);
                 Assert.True(clp.Args.ContainsKey("arg1"));
                 Assert.Equal("arg1val", clp.Args["arg1"]);
                 Assert.True(clp.Args.ContainsKey("arg2"));
@@ -112,7 +112,7 @@ namespace GitHub.Runner.Common.Tests
                 trace.Info("Parsed");
 
                 trace.Info("Args: {0}", clp.Flags.Count);
-                Assert.True(clp.Flags.Count == 2);
+                Assert.Equal(2, clp.Flags.Count);
                 Assert.Contains("flag1", clp.Flags);
                 Assert.Contains("flag2", clp.Flags);
             }

src/Test/L0/ConstantGenerationL0.cs

@@ -24,7 +24,7 @@ namespace GitHub.Runner.Common.Tests
                 "osx-arm64"
             };
 
-            Assert.True(BuildConstants.Source.CommitHash.Length == 40, $"CommitHash should be SHA-1 hash {BuildConstants.Source.CommitHash}");
+            Assert.Equal(40, BuildConstants.Source.CommitHash.Length);
             Assert.True(validPackageNames.Contains(BuildConstants.RunnerPackage.PackageName), $"PackageName should be one of the following '{string.Join(", ", validPackageNames)}', current PackageName is '{BuildConstants.RunnerPackage.PackageName}'");
         }
     }

src/Test/L0/Listener/CommandSettingsL0.cs

@@ -806,7 +806,7 @@ namespace GitHub.Runner.Common.Tests
                         "test runner" });
 
                 // Assert.
-                Assert.True(command.Validate().Count == 0);
+                Assert.Equal(0, command.Validate().Count);
             }
         }
 
@@ -844,7 +844,7 @@ namespace GitHub.Runner.Common.Tests
                 var command = new CommandSettings(hc, args: new string[] { validCommand, $"--{flag}" });
 
                 // Assert.
-                Assert.True(command.Validate().Count == 0);
+                Assert.Equal(0, command.Validate().Count);
             }
         }
 
@@ -874,7 +874,7 @@ namespace GitHub.Runner.Common.Tests
                 var command = new CommandSettings(hc, args: new string[] { validCommand, $"--{arg}", argValue });
 
                 // Assert.
-                Assert.True(command.Validate().Count == 0);
+                Assert.Equal(0, command.Validate().Count);
             }
         }
 

src/Test/L0/Listener/Configuration/ConfigurationManagerL0.cs

@@ -190,11 +190,11 @@ namespace GitHub.Runner.Common.Tests.Listener.Configuration
                 trace.Info("Configured, verifying all the parameter value");
                 var s = configManager.LoadSettings();
                 Assert.NotNull(s);
-                Assert.True(s.ServerUrl.Equals(_expectedServerUrl));
+                Assert.Equal(_expectedServerUrl, s.ServerUrl);
-                Assert.True(s.AgentName.Equals(_expectedAgentName));
+                Assert.Equal(_expectedAgentName, s.AgentName);
-                Assert.True(s.PoolId.Equals(_secondRunnerGroupId));
+                Assert.Equal(_secondRunnerGroupId, s.PoolId);
-                Assert.True(s.WorkFolder.Equals(_expectedWorkFolder));
+                Assert.Equal(_expectedWorkFolder, s.WorkFolder);
-                Assert.True(s.Ephemeral.Equals(true));
+                Assert.True(s.Ephemeral);
 
                 // validate GetAgentPoolsAsync gets called twice with automation pool type
                 _runnerServer.Verify(x => x.GetAgentPoolsAsync(It.IsAny<string>(), It.Is<TaskAgentPoolType>(p => p == TaskAgentPoolType.Automation)), Times.Exactly(2));
@@ -292,11 +292,11 @@ namespace GitHub.Runner.Common.Tests.Listener.Configuration
                 trace.Info("Configured, verifying all the parameter value");
                 var s = configManager.LoadSettings();
                 Assert.NotNull(s);
-                Assert.True(s.ServerUrl.Equals(_expectedServerUrl));
+                Assert.Equal(_expectedServerUrl, s.ServerUrl);
-                Assert.True(s.AgentName.Equals(_expectedAgentName));
+                Assert.Equal(_expectedAgentName, s.AgentName);
-                Assert.True(s.PoolId.Equals(_secondRunnerGroupId));
+                Assert.Equal(_secondRunnerGroupId, s.PoolId);
-                Assert.True(s.WorkFolder.Equals(_expectedWorkFolder));
+                Assert.Equal(_expectedWorkFolder, s.WorkFolder);
-                Assert.True(s.Ephemeral.Equals(true));
+                Assert.True(s.Ephemeral);
 
                 // validate GetAgentPoolsAsync gets called twice with automation pool type
                 _runnerServer.Verify(x => x.GetAgentPoolsAsync(It.IsAny<string>(), It.Is<TaskAgentPoolType>(p => p == TaskAgentPoolType.Automation)), Times.Exactly(2));

src/Test/L0/Listener/ErrorThrottlerL0.cs

@@ -0,0 +1,213 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Listener;
+using GitHub.Runner.Listener.Configuration;
+using GitHub.Runner.Common.Tests;
+using System.Runtime.CompilerServices;
+using GitHub.Services.WebApi;
+using Moq;
+using Xunit;
+
+namespace GitHub.Runner.Common.Tests.Listener
+{
+    public sealed class ErrorThrottlerL0
+    {
+        [Theory]
+        [InlineData(1)]
+        [InlineData(2)]
+        [InlineData(3)]
+        [InlineData(4)]
+        [InlineData(5)]
+        [InlineData(6)]
+        [InlineData(7)]
+        [InlineData(8)]
+        public async void TestIncrementAndWait(int totalAttempts)
+        {
+            using (TestHostContext hc = CreateTestContext())
+            {
+                // Arrange
+                var errorThrottler = new ErrorThrottler();
+                errorThrottler.Initialize(hc);
+                var eventArgs = new List<DelayEventArgs>();
+                hc.Delaying += (sender, args) =>
+                {
+                    eventArgs.Add(args);
+                };
+
+                // Act
+                for (int attempt = 1; attempt <= totalAttempts; attempt++)
+                {
+                    await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+                }
+
+                // Assert
+                Assert.Equal(totalAttempts - 1, eventArgs.Count);
+                for (int i = 0; i < eventArgs.Count; i++)
+                {
+                    // Expected milliseconds
+                    int expectedMin;
+                    int expectedMax;
+
+                    switch (i)
+                    {
+                        case 0:
+                            expectedMin = 1000; // Min backoff
+                            expectedMax = 1000;
+                            break;
+                        case 1:
+                            expectedMin = 1800; // Min + 0.8 * Coefficient
+                            expectedMax = 2200; // Min + 1.2 * Coefficient
+                            break;
+                        case 2:
+                            expectedMin = 3400; // Min + 0.8 * Coefficient * 3
+                            expectedMax = 4600; // Min + 1.2 * Coefficient * 3
+                            break;
+                        case 3:
+                            expectedMin = 6600; // Min + 0.8 * Coefficient * 7
+                            expectedMax = 9400; // Min + 1.2 * Coefficient * 7
+                            break;
+                        case 4:
+                            expectedMin = 13000; // Min + 0.8 * Coefficient * 15
+                            expectedMax = 19000; // Min + 1.2 * Coefficient * 15
+                            break;
+                        case 5:
+                            expectedMin = 25800; // Min + 0.8 * Coefficient * 31
+                            expectedMax = 38200; // Min + 1.2 * Coefficient * 31
+                            break;
+                        case 6:
+                            expectedMin = 51400; // Min + 0.8 * Coefficient * 63
+                            expectedMax = 60000; // Max backoff
+                            break;
+                        case 7:
+                            expectedMin = 60000;
+                            expectedMax = 60000;
+                            break;
+                        default:
+                            throw new NotSupportedException("Unexpected eventArgs count");
+                    }
+
+                    var actualMilliseconds = eventArgs[i].Delay.TotalMilliseconds;
+                    Assert.True(expectedMin <= actualMilliseconds, $"Unexpected min delay for eventArgs[{i}]. Expected min {expectedMin}, actual {actualMilliseconds}");
+                    Assert.True(expectedMax >= actualMilliseconds, $"Unexpected max delay for eventArgs[{i}]. Expected max {expectedMax}, actual {actualMilliseconds}");
+                }
+            }
+        }
+
+        [Fact]
+        public async void TestReset()
+        {
+            using (TestHostContext hc = CreateTestContext())
+            {
+                // Arrange
+                var errorThrottler = new ErrorThrottler();
+                errorThrottler.Initialize(hc);
+                var eventArgs = new List<DelayEventArgs>();
+                hc.Delaying += (sender, args) =>
+                {
+                    eventArgs.Add(args);
+                };
+
+                // Act
+                await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+                await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+                await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+                errorThrottler.Reset();
+                await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+                await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+                await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+
+                // Assert
+                Assert.Equal(4, eventArgs.Count);
+                for (int i = 0; i < eventArgs.Count; i++)
+                {
+                    // Expected milliseconds
+                    int expectedMin;
+                    int expectedMax;
+
+                    switch (i)
+                    {
+                        case 0:
+                        case 2:
+                            expectedMin = 1000; // Min backoff
+                            expectedMax = 1000;
+                            break;
+                        case 1:
+                        case 3:
+                            expectedMin = 1800; // Min + 0.8 * Coefficient
+                            expectedMax = 2200; // Min + 1.2 * Coefficient
+                            break;
+                        default:
+                            throw new NotSupportedException("Unexpected eventArgs count");
+                    }
+
+                    var actualMilliseconds = eventArgs[i].Delay.TotalMilliseconds;
+                    Assert.True(expectedMin <= actualMilliseconds, $"Unexpected min delay for eventArgs[{i}]. Expected min {expectedMin}, actual {actualMilliseconds}");
+                    Assert.True(expectedMax >= actualMilliseconds, $"Unexpected max delay for eventArgs[{i}]. Expected max {expectedMax}, actual {actualMilliseconds}");
+                }
+            }
+        }
+
+        [Fact]
+        public async void TestReceivesCancellationToken()
+        {
+            using (TestHostContext hc = CreateTestContext())
+            {
+                // Arrange
+                var errorThrottler = new ErrorThrottler();
+                errorThrottler.Initialize(hc);
+                var eventArgs = new List<DelayEventArgs>();
+                hc.Delaying += (sender, args) =>
+                {
+                    eventArgs.Add(args);
+                };
+                var cancellationTokenSource1 = new CancellationTokenSource();
+                var cancellationTokenSource2 = new CancellationTokenSource();
+                var cancellationTokenSource3 = new CancellationTokenSource();
+
+                // Act
+                await errorThrottler.IncrementAndWaitAsync(cancellationTokenSource1.Token);
+                await errorThrottler.IncrementAndWaitAsync(cancellationTokenSource2.Token);
+                await errorThrottler.IncrementAndWaitAsync(cancellationTokenSource3.Token);
+
+                // Assert
+                Assert.Equal(2, eventArgs.Count);
+                Assert.Equal(cancellationTokenSource2.Token, eventArgs[0].Token);
+                Assert.Equal(cancellationTokenSource3.Token, eventArgs[1].Token);
+            }
+        }
+
+        [Fact]
+        public async void TestReceivesSender()
+        {
+            using (TestHostContext hc = CreateTestContext())
+            {
+                // Arrange
+                var errorThrottler = new ErrorThrottler();
+                errorThrottler.Initialize(hc);
+                var senders = new List<object>();
+                hc.Delaying += (sender, args) =>
+                {
+                    senders.Add(sender);
+                };
+
+                // Act
+                await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+                await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+                await errorThrottler.IncrementAndWaitAsync(CancellationToken.None);
+
+                // Assert
+                Assert.Equal(2, senders.Count);
+                Assert.Equal(hc, senders[0]);
+                Assert.Equal(hc, senders[1]);
+            }
+        }
+
+        private TestHostContext CreateTestContext([CallerMemberName] String testName = "")
+        {
+            return new TestHostContext(this, testName);
+        }
+    }
+}

src/Test/L0/Listener/JobDispatcherL0.cs

@@ -734,7 +734,10 @@ namespace GitHub.Runner.Common.Tests.Listener
                 await jobDispatcher.WaitAsync(CancellationToken.None);
 
                 Assert.True(jobDispatcher.RunOnceJobCompleted.Task.IsCompleted, "JobDispatcher should set task complete token for one time agent.");
-                Assert.True(jobDispatcher.RunOnceJobCompleted.Task.Result, "JobDispatcher should set task complete token to 'TRUE' for one time agent.");
+                if (jobDispatcher.RunOnceJobCompleted.Task.IsCompleted)
+                {
+                    Assert.True(await jobDispatcher.RunOnceJobCompleted.Task, "JobDispatcher should set task complete token to 'TRUE' for one time agent.");
+                }
             }
         }
 

src/Test/L0/Listener/RunnerL0.cs

@@ -23,6 +23,7 @@ namespace GitHub.Runner.Common.Tests.Listener
         private Mock<ITerminal> _term;
         private Mock<IConfigurationStore> _configStore;
         private Mock<ISelfUpdater> _updater;
+        private Mock<IErrorThrottler> _acquireJobThrottler;
 
         public RunnerL0()
         {
@@ -35,6 +36,7 @@ namespace GitHub.Runner.Common.Tests.Listener
             _term = new Mock<ITerminal>();
             _configStore = new Mock<IConfigurationStore>();
             _updater = new Mock<ISelfUpdater>();
+            _acquireJobThrottler = new Mock<IErrorThrottler>();
         }
 
         private Pipelines.AgentJobRequestMessage CreateJobRequestMessage(string jobName)
@@ -67,6 +69,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 hc.SetSingleton<IPromptManager>(_promptManager.Object);
                 hc.SetSingleton<IRunnerServer>(_runnerServer.Object);
                 hc.SetSingleton<IConfigurationStore>(_configStore.Object);
+                hc.EnqueueInstance<IErrorThrottler>(_acquireJobThrottler.Object);
                 runner.Initialize(hc);
                 var settings = new RunnerSettings
                 {
@@ -126,7 +129,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 //wait for the runner to run one job
                 if (!await signalWorkerComplete.WaitAsync(2000))
                 {
-                    Assert.True(false, $"{nameof(_messageListener.Object.GetNextMessageAsync)} was not invoked.");
+                    Assert.Fail($"{nameof(_messageListener.Object.GetNextMessageAsync)} was not invoked.");
                 }
                 else
                 {
@@ -174,6 +177,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 hc.SetSingleton<IPromptManager>(_promptManager.Object);
                 hc.SetSingleton<IMessageListener>(_messageListener.Object);
                 hc.SetSingleton<IConfigurationStore>(_configStore.Object);
+                hc.EnqueueInstance<IErrorThrottler>(_acquireJobThrottler.Object);
 
                 var command = new CommandSettings(hc, args);
 
@@ -205,6 +209,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 hc.SetSingleton<IPromptManager>(_promptManager.Object);
                 hc.SetSingleton<IMessageListener>(_messageListener.Object);
                 hc.SetSingleton<IConfigurationStore>(_configStore.Object);
+                hc.EnqueueInstance<IErrorThrottler>(_acquireJobThrottler.Object);
 
                 var command = new CommandSettings(hc, new[] { "run" });
 
@@ -242,6 +247,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 hc.SetSingleton<IPromptManager>(_promptManager.Object);
                 hc.SetSingleton<IRunnerServer>(_runnerServer.Object);
                 hc.SetSingleton<IConfigurationStore>(_configStore.Object);
+                hc.EnqueueInstance<IErrorThrottler>(_acquireJobThrottler.Object);
                 runner.Initialize(hc);
                 var settings = new RunnerSettings
                 {
@@ -305,8 +311,11 @@ namespace GitHub.Runner.Common.Tests.Listener
                 await Task.WhenAny(runnerTask, Task.Delay(30000));
 
                 Assert.True(runnerTask.IsCompleted, $"{nameof(runner.ExecuteCommand)} timed out.");
-                Assert.True(!runnerTask.IsFaulted, runnerTask.Exception?.ToString());
+                Assert.False(runnerTask.IsFaulted, runnerTask.Exception?.ToString());
-                Assert.True(runnerTask.Result == Constants.Runner.ReturnCode.Success);
+                if (runnerTask.IsCompleted)
+                {
+                    Assert.Equal(Constants.Runner.ReturnCode.Success, await runnerTask);
+                }
 
                 _jobDispatcher.Verify(x => x.Run(It.IsAny<Pipelines.AgentJobRequestMessage>(), true), Times.Once(),
                      $"{nameof(_jobDispatcher.Object.Run)} was not invoked.");
@@ -335,6 +344,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 hc.SetSingleton<IPromptManager>(_promptManager.Object);
                 hc.SetSingleton<IRunnerServer>(_runnerServer.Object);
                 hc.SetSingleton<IConfigurationStore>(_configStore.Object);
+                hc.EnqueueInstance<IErrorThrottler>(_acquireJobThrottler.Object);
                 runner.Initialize(hc);
                 var settings = new RunnerSettings
                 {
@@ -406,7 +416,10 @@ namespace GitHub.Runner.Common.Tests.Listener
 
                 Assert.True(runnerTask.IsCompleted, $"{nameof(runner.ExecuteCommand)} timed out.");
                 Assert.True(!runnerTask.IsFaulted, runnerTask.Exception?.ToString());
-                Assert.True(runnerTask.Result == Constants.Runner.ReturnCode.Success);
+                if (runnerTask.IsCompleted)
+                {
+                    Assert.Equal(Constants.Runner.ReturnCode.Success, await runnerTask);
+                }
 
                 _jobDispatcher.Verify(x => x.Run(It.IsAny<Pipelines.AgentJobRequestMessage>(), true), Times.Once(),
                      $"{nameof(_jobDispatcher.Object.Run)} was not invoked.");
@@ -433,6 +446,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 hc.SetSingleton<IRunnerServer>(_runnerServer.Object);
                 hc.SetSingleton<IConfigurationStore>(_configStore.Object);
                 hc.SetSingleton<ISelfUpdater>(_updater.Object);
+                hc.EnqueueInstance<IErrorThrottler>(_acquireJobThrottler.Object);
 
                 runner.Initialize(hc);
                 var settings = new RunnerSettings
@@ -492,7 +506,10 @@ namespace GitHub.Runner.Common.Tests.Listener
 
                 Assert.True(runnerTask.IsCompleted, $"{nameof(runner.ExecuteCommand)} timed out.");
                 Assert.True(!runnerTask.IsFaulted, runnerTask.Exception?.ToString());
-                Assert.True(runnerTask.Result == Constants.Runner.ReturnCode.RunOnceRunnerUpdating);
+                if (runnerTask.IsCompleted)
+                {
+                    Assert.Equal(Constants.Runner.ReturnCode.RunOnceRunnerUpdating, await runnerTask);
+                }
 
                 _updater.Verify(x => x.SelfUpdate(It.IsAny<AgentRefreshMessage>(), It.IsAny<IJobDispatcher>(), false, It.IsAny<CancellationToken>()), Times.Once);
                 _jobDispatcher.Verify(x => x.Run(It.IsAny<Pipelines.AgentJobRequestMessage>(), true), Times.Never());
@@ -513,6 +530,7 @@ namespace GitHub.Runner.Common.Tests.Listener
                 hc.SetSingleton<IConfigurationManager>(_configurationManager.Object);
                 hc.SetSingleton<IConfigurationStore>(_configStore.Object);
                 hc.SetSingleton<IPromptManager>(_promptManager.Object);
+                hc.EnqueueInstance<IErrorThrottler>(_acquireJobThrottler.Object);
 
                 var command = new CommandSettings(hc, new[] { "remove", "--local" });
 

src/Test/L0/ProcessExtensionL0.cs

@@ -58,7 +58,7 @@ namespace GitHub.Runner.Common.Tests
                         trace.Error(ex);
                     }
 
-                    Assert.True(false, "Fail to retrive process environment variable.");
+                    Assert.Fail("Failed to retrieve process environment variable.");
                 }
                 finally
                 {

src/Test/L0/RunnerWebProxyL0.cs

@@ -65,7 +65,14 @@ namespace GitHub.Runner.Common.Tests
                 }
             }
 
-            Assert.True(badCode.Count == 0, $"The following code is using Raw HttpClientHandler() which will not follow the proxy setting agent have. Please use HostContext.CreateHttpClientHandler() instead.\n {string.Join("\n", badCode)}");
+            if (badCode.Count > 0)
+            {
+                Assert.Fail($"The following code is using Raw HttpClientHandler() which will not follow the proxy setting agent have. Please use HostContext.CreateHttpClientHandler() instead.\n {string.Join("\n", badCode)}");
+            }
+            else
+            {
+                Assert.True(true);
+            }
         }
 
         [Fact]
@@ -112,7 +119,14 @@ namespace GitHub.Runner.Common.Tests
                 }
             }
 
-            Assert.True(badCode.Count == 0, $"The following code is using Raw HttpClient() which will not follow the proxy setting agent have. Please use New HttpClient(HostContext.CreateHttpClientHandler()) instead.\n {string.Join("\n", badCode)}");
+            if (badCode.Count > 0)
+            {
+                Assert.Fail($"The following code is using Raw HttpClient() which will not follow the proxy setting agent have. Please use New HttpClient(HostContext.CreateHttpClientHandler()) instead.\n {string.Join("\n", badCode)}");
+            }
+            else
+            {
+                Assert.True(true);
+            }
         }
 
         [Fact]

src/Test/L0/TestHostContext.cs

@@ -30,9 +30,11 @@ namespace GitHub.Runner.Common.Tests
         private string _tempDirectoryRoot = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("D"));
         private StartupType _startupType;
         public event EventHandler Unloading;
+        public event EventHandler<DelayEventArgs> Delaying;
         public CancellationToken RunnerShutdownToken => _runnerShutdownTokenSource.Token;
         public ShutdownReason RunnerShutdownReason { get; private set; }
         public ISecretMasker SecretMasker => _secretMasker;
+
         public TestHostContext(object testClass, [CallerMemberName] string testName = "")
         {
             ArgUtil.NotNull(testClass, nameof(testClass));
@@ -92,6 +94,14 @@ namespace GitHub.Runner.Common.Tests
 
         public async Task Delay(TimeSpan delay, CancellationToken token)
         {
+            // Event callback
+            EventHandler<DelayEventArgs> handler = Delaying;
+            if (handler != null)
+            {
+                handler(this, new DelayEventArgs(delay, token));
+            }
+
+            // Delay zero
             await Task.Delay(TimeSpan.Zero);
         }
 
@@ -361,4 +371,19 @@ namespace GitHub.Runner.Common.Tests
             }
         }
     }
+
+    public class DelayEventArgs : EventArgs
+    {
+        public DelayEventArgs(
+            TimeSpan delay,
+            CancellationToken token)
+        {
+            Delay = delay;
+            Token = token;
+        }
+
+        public TimeSpan Delay { get; }
+
+        public CancellationToken Token { get; }
+    }
 }

src/Test/L0/Worker/ActionManagerL0.cs

@@ -460,7 +460,7 @@ runs:
                 //Act
                 var steps = (await _actionManager.PrepareActionsAsync(_ec.Object, actions)).ContainerSetupSteps;
 
-                Assert.True(steps.Count == 0);
+                Assert.Equal(0, steps.Count);
             }
             finally
             {
@@ -915,7 +915,7 @@ runs:
                 var steps = (await _actionManager.PrepareActionsAsync(_ec.Object, actions)).ContainerSetupSteps;
 
                 // node.js based action doesn't need any extra steps to build/pull containers.
-                Assert.True(steps.Count == 0);
+                Assert.Equal(0, steps.Count);
             }
             finally
             {
@@ -1051,7 +1051,7 @@ runs:
                 var steps = (await _actionManager.PrepareActionsAsync(_ec.Object, actions)).ContainerSetupSteps;
 
                 // node.js based action doesn't need any extra steps to build/pull containers.
-                Assert.True(steps.Count == 0);
+                Assert.Equal(0, steps.Count);
                 var watermarkFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), "TingluoHuang/runner_L0", "CompositeBasic.completed");
                 Assert.True(File.Exists(watermarkFile));
                 // Comes from the composite action
@@ -1245,7 +1245,7 @@ runs:
                 // Assert.
                 Assert.NotNull(definition);
                 Assert.NotNull(definition.Data);
-                Assert.True(definition.Data.Execution.ExecutionType == ActionExecutionType.Script);
+                Assert.Equal(ActionExecutionType.Script, definition.Data.Execution.ExecutionType);
             }
             finally
             {

src/Test/L0/Worker/JobExtensionL0.cs

@@ -140,6 +140,7 @@ namespace GitHub.Runner.Common.Tests.Worker
             hc.SetSingleton(_diagnosticLogManager.Object);
             hc.SetSingleton(_jobHookProvider.Object);
             hc.SetSingleton(_snapshotOperationProvider.Object);
+            hc.SetSingleton(new Mock<IOSWarningChecker>().Object);
             hc.EnqueueInstance<IPagingLogger>(_logger.Object); // JobExecutionContext
             hc.EnqueueInstance<IPagingLogger>(_logger.Object); // job start hook
             hc.EnqueueInstance<IPagingLogger>(_logger.Object); // Initial Job

src/Test/Test.csproj

@@ -16,7 +16,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
-        <PackageReference Include="xunit" Version="2.4.1" />
+        <PackageReference Include="xunit" Version="2.7.1" />
         <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
         <PackageReference Include="System.Buffers" Version="4.5.1" />
         <PackageReference Include="System.Reflection.TypeExtensions" Version="4.4.0" />

src/TestDotNet8Compatibility/Program.cs

@@ -0,0 +1,13 @@
+using System;
+
+namespace TestDotNet8Compatibility
+{
+    public static class Program
+    {
+        public static int Main(string[] args)
+        {
+            Console.WriteLine("Hello from .NET 8!");
+            return 0;
+        }
+    }
+}

src/TestDotNet8Compatibility/TestDotNet8Compatibility.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <OutputType>Exe</OutputType>
+    <RuntimeIdentifiers>win-x64;win-x86;linux-x64;linux-arm64;linux-arm;osx-x64;osx-arm64;win-arm64</RuntimeIdentifiers>
+    <SelfContained>true</SelfContained>
+    <PublishTrimmed>true</PublishTrimmed>
+    <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>
+    <Version>$(Version)</Version>
+    <PredefinedCulturesOnly>false</PredefinedCulturesOnly>
+    <PublishReadyToRunComposite>true</PublishReadyToRunComposite>
+  </PropertyGroup>
+
+  <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
+    <DebugType>portable</DebugType>
+  </PropertyGroup>
+
+</Project>

src/TestDotNet8Compatibility/dir.proj

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build"
+    xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+
+    <ItemGroup>
+        <ProjectFiles Include="TestDotNet8Compatibility.csproj" />
+    </ItemGroup>
+
+    <Target Name="Build">
+        <MSBuild Targets="Restore" Projects="@(ProjectFiles)" StopOnFirstFailure="true" />
+        <MSBuild Targets="Publish" Projects="@(ProjectFiles)" BuildInParallel="false" StopOnFirstFailure="true" Properties="Configuration=$(BUILDCONFIG);PackageRuntime=$(PackageRuntime);Version=$(RunnerVersion);RuntimeIdentifier=$(PackageRuntime);PublishDir=$(MSBuildProjectDirectory)/../../_layout/bin/testDotNet8Compatibility" />
+    </Target>
+
+    <Target Name="Clean">
+        <RemoveDir Directories="$(MSBuildProjectDirectory)/../../_layout/bin/testDotNet8Compatibility" />
+        <RemoveDir Directories="TestDotNet8Compatibility/bin" />
+        <RemoveDir Directories="TestDotNet8Compatibility/obj" />
+    </Target>
+
+    <Target Name="Layout" DependsOnTargets="Clean;Build">
+    </Target>
+</Project>

src/TestDotNet8Compatibility/global.json

@@ -0,0 +1,5 @@
+{
+  "sdk": {
+    "version": "8.0.303"
+  }
+}

src/dev.sh

@@ -17,8 +17,10 @@ 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="6.0.424"
 DOTNETSDK_INSTALLDIR="$DOTNETSDK_ROOT/$DOTNETSDK_VERSION"
+DOTNET8SDK_VERSION="8.0.303"
+DOTNET8SDK_INSTALLDIR="$DOTNETSDK_ROOT/$DOTNET8SDK_VERSION"
 RUNNER_VERSION=$(cat runnerversion)
 
 pushd "$SCRIPT_DIR"
@@ -125,6 +127,19 @@ function build ()
 {
     heading "Building ..."
     dotnet msbuild -t:Build -p:PackageRuntime="${RUNTIME_ID}" -p:BUILDCONFIG="${BUILD_CONFIG}" -p:RunnerVersion="${RUNNER_VERSION}" ./dir.proj || failed build
+
+    # Build TestDotNet8Compatibility
+    heading "Building .NET 8 compatibility test"
+    echo "Prepend ${DOTNET8SDK_INSTALLDIR} to %PATH%"         # Prepend .NET 8 SDK to PATH
+    PATH_BAK=$PATH
+    export PATH=${DOTNET8SDK_INSTALLDIR}:$PATH
+    pushd "$SCRIPT_DIR/TestDotNet8Compatibility" > /dev/null  # Working directory
+    pwd
+    echo "Dotnet 8 SDK Version"
+    dotnet --version
+    dotnet msbuild -t:Build -p:PackageRuntime="${RUNTIME_ID}" -p:BUILDCONFIG="${BUILD_CONFIG}" -p:RunnerVersion="${RUNNER_VERSION}" ./dir.proj || failed build
+    popd > /dev/null       # Restore working directory
+    export PATH=$PATH_BAK  # Restore PATH
 }
 
 function layout ()
@@ -143,6 +158,18 @@ function layout ()
 
     heading "Setup externals folder for $RUNTIME_ID runner's layout"
     bash ./Misc/externals.sh $RUNTIME_ID || checkRC externals.sh
+
+    # Build TestDotNet8Compatibility
+    echo "Prepend ${DOTNET8SDK_INSTALLDIR} to %PATH%"         # Prepend .NET 8 SDK to PATH
+    PATH_BAK=$PATH
+    export PATH=${DOTNET8SDK_INSTALLDIR}:$PATH
+    pushd "$SCRIPT_DIR/TestDotNet8Compatibility" > /dev/null  # Working directory
+    heading "Dotnet 8 SDK Version"
+    dotnet --version
+    heading "Building .NET 8 compatibility test"
+    dotnet msbuild -t:layout -p:PackageRuntime="${RUNTIME_ID}" -p:BUILDCONFIG="${BUILD_CONFIG}" -p:RunnerVersion="${RUNNER_VERSION}" ./dir.proj || failed build
+    popd > /dev/null       # Restore working directory
+    export PATH=$PATH_BAK  # Restore PATH
 }
 
 function runtest ()
@@ -199,6 +226,7 @@ function package ()
     popd > /dev/null
 }
 
+# Install .NET SDK
 if [[ (! -d "${DOTNETSDK_INSTALLDIR}") || (! -e "${DOTNETSDK_INSTALLDIR}/.${DOTNETSDK_VERSION}") || (! -e "${DOTNETSDK_INSTALLDIR}/dotnet") ]]; then
 
     # Download dotnet SDK to ../_dotnetsdk directory
@@ -224,6 +252,32 @@ if [[ (! -d "${DOTNETSDK_INSTALLDIR}") || (! -e "${DOTNETSDK_INSTALLDIR}/.${DOTN
     echo "${DOTNETSDK_VERSION}" > "${DOTNETSDK_INSTALLDIR}/.${DOTNETSDK_VERSION}"
 fi
 
+# Install .NET 8 SDK
+if [[ (! -d "${DOTNET8SDK_INSTALLDIR}") || (! -e "${DOTNET8SDK_INSTALLDIR}/.${DOTNET8SDK_VERSION}") || (! -e "${DOTNET8SDK_INSTALLDIR}/dotnet") ]]; then
+
+    # Download dotnet 8 SDK to ../_dotnetsdk directory
+    heading "Ensure Dotnet 8 SDK"
+
+    # _dotnetsdk
+    #           \1.0.x
+    #                            \dotnet
+    #                            \.1.0.x
+    echo "Download dotnet8sdk into ${DOTNET8SDK_INSTALLDIR}"
+    rm -Rf "${DOTNETSDK_DIR}"
+
+    # run dotnet-install.ps1 on windows, dotnet-install.sh on linux
+    if [[ ("$CURRENT_PLATFORM" == "windows") ]]; then
+        echo "Convert ${DOTNET8SDK_INSTALLDIR} to Windows style path"
+        sdkinstallwindow_path=${DOTNET8SDK_INSTALLDIR:1}
+        sdkinstallwindow_path=${sdkinstallwindow_path:0:1}:${sdkinstallwindow_path:1}
+        $POWERSHELL -NoLogo -Sta -NoProfile -NonInteractive -ExecutionPolicy Unrestricted -Command "& \"./Misc/dotnet-install.ps1\" -Version ${DOTNET8SDK_VERSION} -InstallDir \"${sdkinstallwindow_path}\" -NoPath; exit \$LastExitCode;" || checkRC dotnet-install.ps1
+    else
+        bash ./Misc/dotnet-install.sh --version ${DOTNET8SDK_VERSION} --install-dir "${DOTNET8SDK_INSTALLDIR}" --no-path || checkRC dotnet-install.sh
+    fi
+
+    echo "${DOTNET8SDK_VERSION}" > "${DOTNET8SDK_INSTALLDIR}/.${DOTNET8SDK_VERSION}"
+fi
+
 echo "Prepend ${DOTNETSDK_INSTALLDIR} to %PATH%"
 export PATH=${DOTNETSDK_INSTALLDIR}:$PATH
 

src/global.json

@@ -1,5 +1,5 @@
 {
   "sdk": {
-    "version": "6.0.421"
+    "version": "6.0.424"
   }
 }

src/runnerversion

@@ -1 +1 @@
-2.316.0
+2.319.0