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https://issues.apache.org/jira/browse/FLINK-20886?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nico Kruber updated FLINK-20886:
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Affects Version/s: (was: 1.12.0)
> Add the option to get a threaddump on checkpoint timeouts
> ---------------------------------------------------------
>
> Key: FLINK-20886
> URL: https://issues.apache.org/jira/browse/FLINK-20886
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Checkpointing
> Reporter: Nico Kruber
> Priority: Major
>
> For debugging checkpoint timeouts, I was thinking about the following
> addition to Flink:
> When a checkpoint times out and the async thread is still running, create a
> threaddump [1] and either add this to the checkpoint stats, log it, or write
> it out.
> This may help identifying where the checkpoint is stuck (maybe a lock, could
> also be in a third party lib like the FS connectors,...). It would give us
> some insights into what the thread is currently doing.
> Limiting the scope of the threads would be nice but may not be possible in
> the general case since additional threads (spawned by the FS connector lib,
> or otherwise connected) may interact with the async thread(s) by e.g. going
> through the same locks.
> [1] https://crunchify.com/how-to-generate-java-thread-dump-programmatically/
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