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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-5713) Protect against NPE in WindowOperator window cleanup
Date Tue, 14 Mar 2017 14:39:41 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15924329#comment-15924329

ASF GitHub Bot commented on FLINK-5713:

GitHub user aljoscha opened a pull request:


    [FLINK-5713] Protect against NPE in WindowOperator window cleanup


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

    $ git pull https://github.com/aljoscha/flink jira-5713-window-gc-protection

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 #3535
commit e126758cecbf7ba9a9e2d6c66f004b25af3f1097
Author: Aljoscha Krettek <aljoscha.krettek@gmail.com>
Date:   2017-02-06T10:10:14Z

    [FLINK-5713] Protect against NPE in WindowOperator window cleanup


> Protect against NPE in WindowOperator window cleanup
> ----------------------------------------------------
>                 Key: FLINK-5713
>                 URL: https://issues.apache.org/jira/browse/FLINK-5713
>             Project: Flink
>          Issue Type: Improvement
>          Components: DataStream API
>    Affects Versions: 1.2.0
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
>             Fix For: 1.2.1
> Some (misbehaved) WindowAssigners can cause windows to be dropped from the merging window
set while a cleanup timer is still active. This will trigger a NullPointerException when that
timer fires.

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