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

["Robert Metzger (JIRA)" <ji...@apache.org>]

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

Robert Metzger updated FLINK-5065:
----------------------------------
    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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)