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From "Carlo Curino (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-1957) ProportionalCapacitPreemptionPolicy handling of corner cases...
Date Mon, 28 Apr 2014 21:25:21 GMT

     [ https://issues.apache.org/jira/browse/YARN-1957?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Carlo Curino updated YARN-1957:

    Attachment: YARN-1957.patch

combined patch for submission...

> ProportionalCapacitPreemptionPolicy handling of corner cases...
> ---------------------------------------------------------------
>                 Key: YARN-1957
>                 URL: https://issues.apache.org/jira/browse/YARN-1957
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>         Attachments: YARN-1957.patch, YARN-1957.patch, YARN-1957_test.patch
> The current version of ProportionalCapacityPreemptionPolicy should be improved to deal
with the following two scenarios:
> 1) when rebalancing over-capacity allocations, it potentially preempts without considering
the maxCapacity constraints of a queue (i.e., preempting possibly more than strictly necessary)
> 2) a zero capacity queue is preempted even if there is no demand (coherent with old use
of zero-capacity to disabled queues)
> The proposed patch fixes both issues, and introduce few new test cases.

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