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https://issues.apache.org/jira/browse/FLINK-5065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Metzger updated FLINK-5065:
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Fix Version/s: (was: 1.2.0)
> Resource leaks in case of lost checkpoint messages
> --------------------------------------------------
>
> Key: FLINK-5065
> URL: https://issues.apache.org/jira/browse/FLINK-5065
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.2.0, 1.1.3
> Reporter: Till Rohrmann
>
> In case of lost checkpoint messages ({{AbstractCheckpointMessage}}) there
> won't be a clean up of the contained state handle done. This can happen in
> case of a JM crash if the TM had just sent a checkpoint message to the JM.
> Upon recovery, the JM won't notice that there was a checkpoint message which
> it had to handle.
> One way to mitigate the problem is to let the TM expect a response from the
> JM and if the JM failed to respond in time, to discard the state handle of
> the checkpoint message. Moreover, the JM could register in a fault tolerant
> store that it started a pending checkpoint. The entry should contain enough
> information (e.g. path for {{FileSystemStateBackend}}) to clean up a pending
> checkpoint with potentially lost checkpoint messages upon recovery of the JM.
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