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From "Tao Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-9413) Queue resource leak after app fail for CapacityScheduler
Date Wed, 27 Mar 2019 04:13:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-9413?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Tao Yang updated YARN-9413:
    Attachment: YARN-9413.001.patch

> Queue resource leak after app fail for CapacityScheduler
> --------------------------------------------------------
>                 Key: YARN-9413
>                 URL: https://issues.apache.org/jira/browse/YARN-9413
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 3.1.2
>            Reporter: Tao Yang
>            Assignee: Tao Yang
>            Priority: Major
>         Attachments: YARN-9413.001.patch
> To reproduce this problem:
>  # Submit an app which is configured to keep containers across app attempts and should
fail after AM finished at first time (am-max-attempts=1).
>  # App is started with 2 containers running on NM1 node.
>  # Fail the AM of the application with PREEMPTED exit status which should not count
towards max attempt retry but app will fail immediately.
>  # Used resource of this queue leaks after app fail.
> The root cause is the inconsistency of handling app attempt failure between RMAppAttemptImpl$BaseFinalTransition#transition
and RMAppImpl$AttemptFailedTransition#transition:
>  # After app fail, RMAppFailedAttemptEvent will be sent in RMAppAttemptImpl$BaseFinalTransition#transition,
it will not count towards max attempt retry, so that it will send AppAttemptRemovedSchedulerEvent
with keepContainersAcrossAppAttempts=true and RMAppFailedAttemptEvent with transferStateFromPreviousAttempt=true.
>  # RMAppImpl$AttemptFailedTransition#transition handle RMAppFailedAttemptEvent and will
fail the app if its max app attempts is 1.
>  # CapacityScheduler handles AppAttemptRemovedSchedulerEvent in CapcityScheduler#doneApplicationAttempt,
it will skip killing and calling completion process for containers belong to this app, so
that queue resource leak happens.

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