[jira] [Commented] (FLINK-4809) Operators should tolerate checkpoint failures

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-4809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16441180#comment-16441180 ] 

ASF GitHub Bot commented on FLINK-4809:
---------------------------------------

Github user rmetzger commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4883#discussion_r182155763
  
    --- Diff: docs/dev/stream/state/checkpointing.md ---
    @@ -118,6 +120,9 @@ env.getCheckpointConfig.setMinPauseBetweenCheckpoints(500)
     // checkpoints have to complete within one minute, or are discarded
     env.getCheckpointConfig.setCheckpointTimeout(60000)
     
    +// prevent the tasks from failing if an error happens in their checkpointing, the checkpoint will just be declined.
    +env.getCheckpointConfig.setFailTasksOnCheckpointingErrors(false)
    --- End diff --
    
    This line is missing from the Java tab.


> Operators should tolerate checkpoint failures
> ---------------------------------------------
>
>                 Key: FLINK-4809
>                 URL: https://issues.apache.org/jira/browse/FLINK-4809
>             Project: Flink
>          Issue Type: Sub-task
>          Components: State Backends, Checkpointing
>            Reporter: Stephan Ewen
>            Assignee: Stefan Richter
>            Priority: Major
>             Fix For: 1.5.0
>
>
> Operators should try/catch exceptions in the synchronous and asynchronous part of the checkpoint and send a {{DeclineCheckpoint}} message as a result.
> The decline message should have the failure cause attached to it.
> The checkpoint barrier should be sent anyways as a first step before attempting to make a state checkpoint, to make sure that downstream operators do not block in alignment.



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