Github user zhuoliu commented on the issue:
https://github.com/apache/storm/pull/1627
Since with the refactoring we directly access the disruptor queue to get
the backpressure status rather than having an additional flag in executor data
which is error-prone when flipping (which is very possibly the root cause of
the halt in STORM-1949), we may NOT need to add the ADDITIONAL ZK pressure
which I mentioned in the above.
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