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https://issues.apache.org/jira/browse/TEZ-1269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopal V updated TEZ-1269:
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Attachment: application_1405212233811_0262.log.gz
A small run with fewer DAGs.
Tez is doing roughly the right thing, when stuck inside a queue.
If I was in a 50% queue, I would get containers with node locality when I give
up containers on another machine.
But within the default queue, giving up rack-local containers to get newer ones
with rack-locality is really not going to produce containers on the given
machine.
> 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, TEZ-1269.2.patch, TEZ-1269.3.patch,
> TEZ-1269.svg, application_1405212233811_0262.log.gz,
> application_1405212233811_0262.log.gz
>
>
> 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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