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From "Aljoscha Krettek (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2491) Operators are not participating in state checkpointing in some cases
Date Tue, 19 Jul 2016 13:03:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15384113#comment-15384113
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Aljoscha Krettek commented on FLINK-2491:
-----------------------------------------

I think we want to tackle this for the 1.2 release, which should happen roughly 3 months after
1.1 is out. We're currently in the last stages of releasing 1.1.

> Operators are not participating in state checkpointing in some cases
> --------------------------------------------------------------------
>
>                 Key: FLINK-2491
>                 URL: https://issues.apache.org/jira/browse/FLINK-2491
>             Project: Flink
>          Issue Type: Bug
>          Components: Streaming
>    Affects Versions: 0.10.0
>            Reporter: Robert Metzger
>            Assignee: Márton Balassi
>            Priority: Critical
>             Fix For: 1.0.0
>
>
> 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.
> The 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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