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https://issues.apache.org/jira/browse/KAFKA-2713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14994156#comment-14994156
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ASF GitHub Bot commented on KAFKA-2713:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/443
> 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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