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https://issues.apache.org/jira/browse/FLINK-32362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rui Fan updated FLINK-32362:
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Parent: FLINK-32548
Issue Type: Sub-task (was: Bug)
> SourceAlignment announceCombinedWatermark period task maybe lost
> ----------------------------------------------------------------
>
> Key: FLINK-32362
> URL: https://issues.apache.org/jira/browse/FLINK-32362
> Project: Flink
> Issue Type: Sub-task
> Affects Versions: 1.16.0
> Reporter: Cai Liuyang
> Assignee: Cai Liuyang
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.18.0, 1.16.3, 1.17.2
>
>
> When we use sourcealignment，we also found there is another problem that
> announceCombinedWatermark may throw a exception (like "subtask 25 is not
> ready yet to receive events" , this subtask maybe under failover), which will
> lead the period task not running any more (ThreadPoolExecutor will not
> schedule the period task if it throw a exception)
> I think we should increase the robustness of announceCombinedWatermark
> function to avoid it throw any exception (if send fail, just wait next send)
> (code see
> [https://github.com/apache/flink/blob/master/flink-runtime/src/main/java/org/apache/flink/runtime/source/coordinator/SourceCoordinator.java#L199]
> )
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