Github user zhangminglei commented on the issue:
https://github.com/apache/flink/pull/4074
@zentol Thanks a bunch for your review. I have updated the code.--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---
