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From "Tao Yang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-9413) Queue resource leak after app fail for CapacityScheduler
Date Wed, 27 Mar 2019 04:07:00 GMT
Tao Yang created YARN-9413:

             Summary: 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

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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