H2ClientParentConnectionContext.StacklessCancellationException was reused by SpliceFlatStreamToMetaSingle, which created a false impression in logs that this exception is related to HTTP/2.
We should capture the Subscriber's stack-trace for CancellationException in BeforeFinallyHttpOperator instead of a netty stack-trace, it will help to debug paths that subscribe to the payload post cancel.
Modifications:
Make H2ClientParentConnectionContext.StacklessCancellationException a top-level class.
Wrap CancellationException with Publisher.defer(...) in BeforeFinallyHttpOperator.
Add an exception message in DefaultBlockingIterableProcessor.
Result:
Easier for users to reason about received CancellationException.
Motivation:
H2ClientParentConnectionContext.StacklessCancellationExceptionwas reused bySpliceFlatStreamToMetaSingle, which created a false impression in logs that this exception is related to HTTP/2.CancellationExceptioninBeforeFinallyHttpOperatorinstead of a netty stack-trace, it will help to debug paths that subscribe to the payload post cancel.Modifications:
H2ClientParentConnectionContext.StacklessCancellationExceptiona top-level class.CancellationExceptionwithPublisher.defer(...)inBeforeFinallyHttpOperator.DefaultBlockingIterableProcessor.Result:
Easier for users to reason about received
CancellationException.