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https://issues.apache.org/jira/browse/FLINK-5713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15924329#comment-15924329
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ASF GitHub Bot commented on FLINK-5713:
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GitHub user aljoscha opened a pull request:
https://github.com/apache/flink/pull/3535
[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:
https://github.com/apache/flink/pull/3535.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 #3535
----
commit e126758cecbf7ba9a9e2d6c66f004b25af3f1097
Author: Aljoscha Krettek <[email protected]>
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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