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https://issues.apache.org/jira/browse/FLINK-2098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14571661#comment-14571661
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ASF GitHub Bot commented on FLINK-2098:
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Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/742#issuecomment-108618014
I generally like that idea. Especially the extensibility with respect to
timestamps and watermark generation is a good point.
Retrieving the lock object from the context is not very obvious, but then
again, someone who implements a fault tolerant exactly-once source should ready
the javadocs and have a look at an example.
> 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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