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https://issues.apache.org/jira/browse/FLINK-31370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Morávek updated FLINK-31370:
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    Description: 
If the task is canceled while the watermark progresses, it may be stuck in the 
Cancelling state for a long time (e.g., when many windows are firing). This is 
closely related to FLINK-20217, which might bring a more robust solution for 
checkpoint and cancellation code paths.

As a stopgap solution, we'll introduce a check allowing InternalTimerService to 
break out of the firing loop if the StreamTask has been marked as canceled.

  was:If the task is being canceled while the watermark is progressing, it may 
be stuck in the Cancelling state for a long time (e.g. when there are many 
windows firing). This is closely related to 


> Cancellation of the StreamTask should prevent more timers from being fired
> --------------------------------------------------------------------------
>
>                 Key: FLINK-31370
>                 URL: https://issues.apache.org/jira/browse/FLINK-31370
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Task
>            Reporter: David Morávek
>            Assignee: David Morávek
>            Priority: Major
>
> If the task is canceled while the watermark progresses, it may be stuck in 
> the Cancelling state for a long time (e.g., when many windows are firing). 
> This is closely related to FLINK-20217, which might bring a more robust 
> solution for checkpoint and cancellation code paths.
> As a stopgap solution, we'll introduce a check allowing InternalTimerService 
> to break out of the firing loop if the StreamTask has been marked as canceled.



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