GitHub user lei-xia opened a pull request:
https://github.com/apache/helix/pull/183
Fix race-condition issue that could block ZkClient event thread in
CallbackHandler.
1) Replace native batch callback handling thread with
DedupEventCallbackProcessor, so the queue is deduplicated when event gets
enqueued, instead of at the time of dequeue.
2) Shutdown and clean up the processor properly when CallbackHanlder is
reset().
3) Add a flag to indicated whether the CallbackHandler is reset. If reset,
do not enqueue further event into the batch callback queue.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lei-xia/helix master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/helix/pull/183.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 #183
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commit a25305eb83c3226d028e39c27a70293c2576756e
Author: Lei Xia <lxia@...>
Date: 2018-04-16T18:38:26Z
Fix race-condition issue that could block ZkClient event thread in
CallbackHandler.
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