GitHub user tillrohrmann opened a pull request:
https://github.com/apache/flink/pull/3210
[FLINK-5638] [asyncIO] Fix deadlock when closing two chained
AsyncWaitOperators
This PR is a backport of #3209 onto `release-1.2.`
This PR addresses the problem by changing the Emitter's behaviour to first
output the
element before removing it from the StreamElementQueue. That way the close
method waits
until also the Emitter has outputted the last completed element.
Additionally, the
stopResources method now frees the checkpoint lock in order to let the
emitter thread
react to the interrupt signal.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tillrohrmann/flink asyncIOFixDeadlockBackport
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3210.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3210
----
commit 770589dd286b1bc30d9bf79d813bc30a371e1995
Author: Till Rohrmann <[email protected]>
Date: 2017-01-25T13:11:48Z
[FLINK-5638] [asyncIO] Fix deadlock when closing two chained
AsyncWaitOperators
This PR addresses the problem by changing the Emitter's behaviour to first
output the
element before removing it from the StreamElementQueue. That way the close
method waits
until also the Emitter has outputted the last completed element.
Additionally, the
stopResources method now frees the checkpoint lock in order to let the
emitter thread
react to the interrupt signal.
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