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https://issues.apache.org/jira/browse/FLINK-9433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16574704#comment-16574704
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Ruidong Li commented on FLINK-9433:
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How about add a clear thread with Java DelayQueue for AsyncWaitOperator.
[~StephanEwen]
> SystemProcessingTimeService does not work properly
> --------------------------------------------------
>
> Key: FLINK-9433
> URL: https://issues.apache.org/jira/browse/FLINK-9433
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Reporter: Ruidong Li
> Assignee: Ruidong Li
> Priority: Critical
> Attachments: log.txt
>
>
> if (WindowOperator --> AsyncWaitOperator) chained together, when the queue
> of AsyncWaitOperator is full and timeTrigger of WindowOperator is triggered
> to call collect(), it will wait until the queue of AsyncWaitOperator is not
> full, at the moment, the timeTrigger of AsyncWaitOperator will not be
> triggered because the SystemProcessingTimeService has only one capacity.
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