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From "Arun Suresh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6180) Clean unused SchedulerRequestKeys once ExecutionType updates are completed
Date Wed, 15 Feb 2017 04:19:42 GMT

    [ https://issues.apache.org/jira/browse/YARN-6180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15867207#comment-15867207
] 

Arun Suresh commented on YARN-6180:
-----------------------------------

Yup, this is meant to track for container updates in general.

Anyway, I was going thru YARN-5540 again, and it looks like the changes in the {{AppScheduleingInfo::decrementOutstanding()}}
does infact clean up schedulerKeys whose numContainers are 0.. the AM does not need to explicitly
send a 0 container ResourceRequest. Since Container Updates are just another SchedulerKey
(well the ExecutionType Updates currently... we still need to move the increase container
plumbing from the AppSchedulingInfo into the ContainerUpdateContext).

I will verify the above with a testcase to verify the expected behavior and either close this
as not an issue or add a testcase only patch for this.

> Clean unused SchedulerRequestKeys once ExecutionType updates are completed
> --------------------------------------------------------------------------
>
>                 Key: YARN-6180
>                 URL: https://issues.apache.org/jira/browse/YARN-6180
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>
> The SchedulerRequestKeys used for ExecutionType updates, that are generated, tend to
accumulate in the AppSchedulingInfo and over time lead to a situation outlined in YARN-5540.
> These keys must be removed once the container update completes.



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