zentol opened a new pull request #12021:
URL: https://github.com/apache/flink/pull/12021
There are 2 problems in this test:
The Job to be canceled also uses the FailingBlockingInvokable, but we
never actually want the Invokable to throw an exception. It should just use a
BlockingNoOpInvokable.
The FailingBlockingInvokable uses static state to control the behavior;
if you don't fork the JVM this can result in unexpected behavior in subsequent
tests. I believe this is what is happening here; the failing test runs first,
sets the blocking flag to false, then the cancel test runs and goes straight to
throwing the exception instead of blocking.
This PR is a quick fix, but long-term we should find a safe pattern for such
stateful Invokables.
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