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Known Build Error: ProcessBufferedRenderBatches_WritesRenders fails
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: https://github.com/dotnet/aspnetcore/pull/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: :mag_right: 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: :white_check_mark: Known issue matched with the provided build.
Validation performed at: 5/6/2025 8:03:17 AM UTC
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 1 | 5 | 12 |
@ilonatommy, FYI - the area-ui-rendering label is specifically for MVC and Razor Pages, and area-blazor is specific to Blazor.
We are quarantining the test in https://github.com/dotnet/aspnetcore/pull/63643 until we are able to investigate the issue properly.
For the record, failure stats on 2025-09-11 have been:
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 1 | 7 |
