Github user uce commented on the pull request:
https://github.com/apache/flink/pull/440#issuecomment-77165497
Thanks, Vasia! :) It still seems to be a problem. I've re-opened the
[corresponding issue](https://issues.apache.org/jira/browse/FLINK-1577) and
will fix it. In any case, nothing should be wrong with the code here (it is a
task cancellation race).
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