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https://issues.apache.org/jira/browse/TEZ-1269?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14058255#comment-14058255
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Gopal V commented on TEZ-1269:
------------------------------
We have 0.4 -> 0.5 as a fairly incompatible upgrade in many ways. Breaking
compat to make it clearer is the best done now.
> TaskScheduler prematurely releases containers
> ---------------------------------------------
>
> Key: TEZ-1269
> URL: https://issues.apache.org/jira/browse/TEZ-1269
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Bikas Saha
> Assignee: Bikas Saha
> Attachments: TEZ-1269.1.patch
>
>
> It checks for session mode and if not true, and if there are no outstanding
> requests, then it releases the containers before the container timeout has
> expired. If the state machine is on its way to scheduling new tasks during
> this time then they will not be able to reuse these containers.
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