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https://issues.apache.org/jira/browse/KAFKA-2713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14993955#comment-14993955
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ASF GitHub Bot commented on KAFKA-2713:
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GitHub user ewencp opened a pull request:
https://github.com/apache/kafka/pull/443
KAFKA-2713: Run task start and stop methods in worker threads so they
execute in parallel and cannot block the herder thread.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ewencp/kafka
kafka-2713-task-start-stop-threaded
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/443.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 #443
----
commit b0aa81f0d32019a4d588daf1e12bd47dd6c95930
Author: Ewen Cheslack-Postava <m...@ewencp.org>
Date: 2015-11-06T16:45:21Z
KAFKA-2713: Run task start and stop methods in worker threads so they
execute in parallel and cannot block the herder thread.
----
> Copycat worker should not call connector's/task's start methods in the
> control thread
> -------------------------------------------------------------------------------------
>
> Key: KAFKA-2713
> URL: https://issues.apache.org/jira/browse/KAFKA-2713
> Project: Kafka
> Issue Type: Sub-task
> Components: copycat
> Reporter: Ewen Cheslack-Postava
> Assignee: Ewen Cheslack-Postava
> Fix For: 0.9.0.0
>
>
> Currently the DistributedHerder calls start() methods in the same thread as
> the group membership is handled. This is simple and makes lifecycles easier
> to reason about, but also means that user code (and even code that can simply
> block for a long time, like sink task's connectors) can potentially block
> group membership, which in turn causes the worker to fall out of the group.
> To avoid this, we should run these methods in the worker thread for each
> connector/task.
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