Github user Hailei commented on the pull request: https://github.com/apache/storm/pull/566#issuecomment-106778432 >we can remove the background flushing task and related synchronization altogether, removing the source of deadlock. We'd simply write and buffer onto the unbounded buffer of Channel +1 I agree with you.flushMessages don't check isWritable,So the last message batch check it is not useful. Block client thread until there is space (back pressure) is better.It can snap out of OOM.
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