Known Build Error: ProcessBufferedRenderBatches_WritesRenders fails

[ilonatommy]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1031764
Build error leg or test failing: Microsoft.AspNetCore.Components.Web.Rendering.RemoteRendererTest.ProcessBufferedRenderBatches_WritesRenders
Pull request: #61529
Failing also on other PRs e.g.: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1032729&view=ms.vss-test-web.build-test-results-tab&runId=27755478&resultId=122381, https://dev.azure.com/dnceng-public/public/_build/results?buildId=1029832&view=ms.vss-test-web.build-test-results-tab&runId=27646550&resultId=120477

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "Microsoft.AspNetCore.Components.Web.Rendering.RemoteRendererTest.ProcessBufferedRenderBatches_WritesRenders [FAIL]",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

2025-05-05T08:15:39.3013972Z   Failed Microsoft.AspNetCore.Components.Web.Rendering.RemoteRendererTest.ProcessBufferedRenderBatches_WritesRenders [10 s]
2025-05-05T08:15:39.3015372Z   Error Message:
2025-05-05T08:15:39.3017721Z    Assert.True() Failure
2025-05-05T08:15:39.3017843Z Expected: True
2025-05-05T08:15:39.3017965Z Actual:   False
2025-05-05T08:15:39.3019065Z   Stack Trace:
2025-05-05T08:15:39.3020381Z      at Microsoft.AspNetCore.Components.Web.Rendering.RemoteRendererTest.TestComponent.TriggerRender() in /_/src/Components/Server/test/Circuits/RemoteRendererTest.cs:line 770
2025-05-05T08:15:39.3020686Z    at Microsoft.AspNetCore.Components.Web.Rendering.RemoteRendererTest.ProcessBufferedRenderBatches_WritesRenders() in /_/src/Components/Server/test/Circuits/RemoteRendererTest.cs:line 169
2025-05-05T08:15:39.3020896Z --- End of stack trace from previous location ---

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1031764
Error message validated: [Microsoft.AspNetCore.Components.Web.Rendering.RemoteRendererTest.ProcessBufferedRenderBatches_WritesRenders [FAIL]]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 5/6/2025 8:03:17 AM UTC

Report

Build	Definition	Test	Pull Request
1034422	dotnet/aspnetcore	Microsoft.AspNetCore.Components.Web.Rendering.RemoteRendererTest.ProcessBufferedRenderBatches_WritesRenders
1031764	dotnet/aspnetcore	Microsoft.AspNetCore.Components.Web.Rendering.RemoteRendererTest.ProcessBufferedRenderBatches_WritesRenders	#61529

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	2	2

[MackinnonBuck]

@ilonatommy, FYI - the area-ui-rendering label is specifically for MVC and Razor Pages, and area-blazor is specific to Blazor.