Github user kl0u commented on the issue:
https://github.com/apache/flink/pull/3758
Hi @zhangminglei, thanks for looking into this! I tend to agree with
@tillrohrmann that there is not need for locking there, as there is no sharing
of the data-structure between different threads. The same holds for the lock at
line 726. So these 2 `synchronized()` clauses could go away.
I will have a more thorough look on the whole locking scheme in the class
in the following days. But for now I think that this PR could be closed and the
JIRA could be updated.
What do you think?
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