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https://issues.apache.org/jira/browse/TEZ-1897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14497409#comment-14497409
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Bikas Saha commented on TEZ-1897:
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>From what I see, drained code is dead since noone calls setDrainEventsOnStop()
>which actually creates a user for the draining logic. We can remove that code
>I think.
> Allow higher concurrency in AsyncDispatcher
> -------------------------------------------
>
> Key: TEZ-1897
> URL: https://issues.apache.org/jira/browse/TEZ-1897
> Project: Apache Tez
> Issue Type: Task
> Reporter: Bikas Saha
> Assignee: Bikas Saha
> Attachments: TEZ-1897.1.patch, TEZ-1897.2.patch, TEZ-1897.3.patch
>
>
> Currently, it processes events on a single thread. For events that can be
> executed in parallel, e.g. vertex manager events, allowing higher concurrency
> may be beneficial.
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