AHeise commented on issue #9385: [FLINK-13635][datastream] Avoid unexpected interruption of AsyncFunction URL: https://github.com/apache/flink/pull/9385#issuecomment-533432744 Hi @ifndef-SleePy , I just stumbled upon this PR (it's assigned to the wrong component). The issue that you reported and solved is not possible after merging https://github.com/apache/flink/pull/9564 and https://github.com/apache/flink/pull/9717 : All timer events and user results will be processed in the same mailbox thread, such that canceling the timer will always happen when the timer itself is not executed. That also solves the other undefined behavior of having a result right after the timeout triggered. I'd like to incorporate the tests of your patch partly in my PR https://github.com/apache/flink/pull/9717 and close this PR.
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