[jira] [Updated] (FLINK-5065) Resource leaks in case of lost checkpoint messages

["Flink Jira Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-5065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Flink Jira Bot updated FLINK-5065:
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      Labels: auto-deprioritized-major auto-deprioritized-minor  (was: auto-deprioritized-major stale-minor)
    Priority: Not a Priority  (was: Minor)

This issue was labeled "stale-minor" 7 days ago and has not received any updates so it is being deprioritized. If this ticket is actually Minor, please raise the priority and ask a committer to assign you the issue or revive the public discussion.


> 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: Runtime / Checkpointing
>    Affects Versions: 1.1.3, 1.2.0
>            Reporter: Till Rohrmann
>            Priority: Not a Priority
>              Labels: auto-deprioritized-major, auto-deprioritized-minor
>
> 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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