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https://issues.apache.org/jira/browse/FLINK-2098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14563209#comment-14563209
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ASF GitHub Bot commented on FLINK-2098:
---------------------------------------
GitHub user aljoscha opened a pull request:
https://github.com/apache/flink/pull/742
[FLINK-2098] Ensure checkpoints and element emission are in order
Before, it could happen that a streaming source would keep emitting
elements while a checkpoint is being performed. This can lead to
inconsistencies in the checkpoints with other operators.
This also adds a test that checks whether only one checkpoint is
executed at a time and the serial behaviour of checkpointing and
emission.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/aljoscha/flink checkpoint-hardening
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/742.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #742
----
commit 5df7410f44c640f3a183b525f697bbc11a69c69b
Author: Aljoscha Krettek <[email protected]>
Date: 2015-05-28T08:24:37Z
[FLINK-2098] Ensure checkpoints and element emission are in order
Before, it could happen that a streaming source would keep emitting
elements while a checkpoint is being performed. This can lead to
inconsistencies in the checkpoints with other operators.
This also adds a test that checks whether only one checkpoint is
executed at a time and the serial behaviour of checkpointing and
emission.
----
> 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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