pnowojski opened a new pull request #10749: [FLINK-15403][task] Allow the CancelTaskException to be thrown from mailbox thread URL: https://github.com/apache/flink/pull/10749 CancelTaskException can be thrown for example from LocalInputChannel#getNextBuffer even if the current (down stream) task hasn't YET been canceled. This restores the behaviour to before [FLINK-15317]. StreamTask is able to correctly process/handle CancelTaskException. ## Verifying this change This adds a new test and is also covered by some end to end tests that were able to detect the issue in the first place. ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (yes / **no**) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**) - The serializers: (yes / **no** / don't know) - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know) - The S3 file system connector: (yes / **no** / don't know) ## Documentation - Does this pull request introduce a new feature? (yes / **no**) - If yes, how is the feature documented? (**not applicable** / docs / JavaDocs / not documented)
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