Till Rohrmann created FLINK-9845:
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Summary: Make InternalTimerService's timer processing
interruptible/abortable
Key: FLINK-9845
URL: https://issues.apache.org/jira/browse/FLINK-9845
Project: Flink
Issue Type: Improvement
Components: State Backends, Checkpointing
Affects Versions: 1.5.1, 1.6.0
Reporter: Till Rohrmann
Fix For: 1.7.0
When cancelling a {{Task}}, the task thread might currently process the timers
registered at the {{InternalTimerService}}. Depending on the timer action, this
might take a while and, thus, blocks the cancellation of the {{Task}}. In the
most extreme case, the {{TaskCancelerWatchDog}} kicks in and kills the whole
{{TaskManager}} process.
In order to alleviate the problem (speed up the cancellation reaction), we
should make the processing of the timers interruptible/abortable. This means
that instead of processing all timers we should check in between timers whether
the {{Task}} is currently being cancelled or not. If this is the case, then we
should directly stop processing the remaining timers and return.
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