servlet: set description for CANCELLED status#11927
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shivaspeaks merged 2 commits intogrpc:masterfrom Mar 12, 2025
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| transportState.runOnTransportThread(() -> transportState.transportReportStatus(status)); | ||
| // There is no way to RST_STREAM with CANCEL code, so write trailers instead | ||
| close(Status.CANCELLED.withCause(status.asRuntimeException()), new Metadata()); | ||
| close(Status.CANCELLED.withDescription("servlet io exception") |
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The description doesn't seem right - we can't assume it was an IO exception, and there may be other causes on non-Tomcat containers. Can we just say "Stream cancelled"?
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If this is received by client - I want to be able to find the source of that in code, otherwise it's quite confusing.
As logic here is a bit special for servlets, I would keep the "servlet" word.
so, can we agree on "servlet stream cancelled" ?
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Yes, but lets capitalize the first letter. Other places setting description in status do so.
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It eventually happens from Tomcat when it's behind nginx.
Currently caller gets just
io.grpc.StatusRuntimeException: CANCELLEDwhich is not very clear.I guess when this code was originally developed, the assumption was that nobody will received it, but it actually happens, so worth making this status more clear.
if you are curious, the exception which causes that is