Github user tzulitai commented on the issue:
https://github.com/apache/flink/pull/4535
@zhuganghuaonnet please let me know when you've opened the JIRA, and
rebased this pull request onto the latest `master`. Also please remember to
rename the pull request title (you can take a look at the other pull request
titles as reference) and fill out the pull request template as necessary :)
Thanks a lot!
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