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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2098) Checkpoint barrier initiation at source is not aligned with snapshotting
Date Tue, 02 Jun 2015 05:21:17 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14568542#comment-14568542

ASF GitHub Bot commented on FLINK-2098:

Github user aljoscha commented on the pull request:

    I will fix the remaining cancel() races. The twitter stuff I just commented out because
I assumed that the new TwitterSource could be merged right away and I was waiting for that.
    As for two Source interfaces. We can certainly do that. The reason I didn't do it is because
there would be a lot of duplication because we have SourceFunction, ParallelSourceFunction,
RichSourceFunction and ParallelRichSourceFunction. With the new Source interface this would
go up to 8 interfaces for the sources. (That's also the reason why I didn't have Kafka derived
from the RichParallelSourceFunction, I thought that maybe we could get rid of the special
interfaces for parallel sources.)
    Also, I realize there are many more problems. I just can't address them all in a single
PR. :sweat_smile: 

> Checkpoint barrier initiation at source is not aligned with snapshotting
> ------------------------------------------------------------------------
>                 Key: FLINK-2098
>                 URL: https://issues.apache.org/jira/browse/FLINK-2098
>             Project: Flink
>          Issue Type: Bug
>          Components: Streaming
>    Affects Versions: 0.9
>            Reporter: Stephan Ewen
>            Assignee: Aljoscha Krettek
>            Priority: Blocker
>             Fix For: 0.9
> The stream source does not properly align the emission of checkpoint barriers with the
drawing of snapshots.

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