[jira] [Updated] (FLINK-2491) Checkpointing only works if all operators/tasks are still running

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

     [ https://issues.apache.org/jira/browse/FLINK-2491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Flink Jira Bot updated FLINK-2491:
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    Labels: stale-critical  (was: )

I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help the community manage its development. I see this issues has been marked as Critical but is unassigned and neither itself nor its Sub-Tasks have been updated for 7 days. I have gone ahead and marked it "stale-critical". If this ticket is critical, please either assign yourself or give an update. Afterwards, please remove the label or in 7 days the issue will be deprioritized.


> Checkpointing only works if all operators/tasks are still running
> -----------------------------------------------------------------
>
>                 Key: FLINK-2491
>                 URL: https://issues.apache.org/jira/browse/FLINK-2491
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Checkpointing
>    Affects Versions: 0.10.0
>            Reporter: Robert Metzger
>            Priority: Critical
>              Labels: stale-critical
>         Attachments: fix_checkpoint_not_working_if_tasks_are_finished.patch
>
>
> While implementing a test case for the Kafka Consumer, I came across the following bug:
> Consider the following topology, with the operator parallelism in parentheses:
> Source (2) --> Sink (1).
> In this setup, the {{snapshotState()}} method is called on the source, but not on the Sink.
> The sink receives the generated data.
> only one of the two sources is generating data.
> I've implemented a test case for this, you can find it here: https://github.com/rmetzger/flink/blob/para_checkpoint_bug/flink-tests/src/test/java/org/apache/flink/test/checkpointing/ParallelismChangeCheckpoinedITCase.java



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