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Posted to issues@flink.apache.org by "Aljoscha Krettek (JIRA)" <ji...@apache.org> on 2017/02/05 14:29:41 UTC

[jira] [Created] (FLINK-5713) Protect against NPE in WindowOperator window cleanup

Aljoscha Krettek created FLINK-5713:
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             Summary: 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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