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https://issues.apache.org/jira/browse/FLINK-9845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Biao Liu reassigned FLINK-9845:
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Assignee: Biao Liu
> 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
> Assignee: Biao Liu
> Priority: Major
> 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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