Github user revans2 commented on the issue:
https://github.com/apache/storm/pull/2829
Sorry my bad, there is an overflow.
https://github.com/apache/storm/blob/4605ae0a34858309171e726e1924b9a37695c977/storm-client/src/jvm/org/apache/storm/executor/ExecutorTransfer.java#L94-L111
The pause happens outside of the spouts in waiting for the queue to not be
full any more just like before with the spouts.---
