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

[Shang Yuanchun (Jira)]

Aljoscha Krettek created FLINK-5713:
---------------------------------------

             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.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)