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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3740) Session Window State is Not Checkpointed
Date Wed, 13 Apr 2016 10:27:25 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15239030#comment-15239030

ASF GitHub Bot commented on FLINK-3740:

GitHub user aljoscha opened a pull request:


    [FLINK-3740] Make Session Window State Checkpointed


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/aljoscha/flink window-snapshot-test

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1878
commit 419d3bd53826d0dd0c40c2eaad83675eb4e14a5a
Author: Aljoscha Krettek <aljoscha.krettek@gmail.com>
Date:   2016-04-12T14:27:18Z

    [FLINK-3740] Make Session Window State Checkpointed


> Session Window State is Not Checkpointed
> ----------------------------------------
>                 Key: FLINK-3740
>                 URL: https://issues.apache.org/jira/browse/FLINK-3740
>             Project: Flink
>          Issue Type: Bug
>          Components: Streaming
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
> The merging window state in the {{WindowOperator}} is not checkpointed. This means that
programs containing session windows will fail upon restore after a failure.
> I propose adding a simulated snapshot/restore cycle to the tests in {{WindowOperatorTest}}
to catch these problems in the future.

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