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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3508) Prevent processing preemption events on the main RM dispatcher
Date Sat, 04 Jul 2015 15:16:07 GMT

    [ https://issues.apache.org/jira/browse/YARN-3508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14613880#comment-14613880
] 

Hudson commented on YARN-3508:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #234 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/234/])
YARN-3508. Prevent processing preemption events on the main RM dispatcher. (Varun Saxena via
wangda) (wangda: rev 0e4b06690ff51fbde3ab26f68fde8aeb32af69af)
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/CapacityScheduler.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/capacity/ProportionalCapacityPreemptionPolicy.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/SchedulingMonitor.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/event/SchedulerEventType.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/ContainerPreemptEvent.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/ContainerPreemptEventType.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/SchedulingEditPolicy.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/capacity/TestProportionalCapacityPreemptionPolicy.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/capacity/TestProportionalCapacityPreemptionPolicyForNodePartitions.java
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceManager.java
* hadoop-yarn-project/CHANGES.txt
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestRMDispatcher.java


> Prevent processing preemption events on the main RM dispatcher
> --------------------------------------------------------------
>
>                 Key: YARN-3508
>                 URL: https://issues.apache.org/jira/browse/YARN-3508
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager, scheduler
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Varun Saxena
>             Fix For: 2.7.2
>
>         Attachments: YARN-3508-branch-2.7.01.patch, YARN-3508.002.patch, YARN-3508.01.patch,
YARN-3508.03.patch, YARN-3508.04.patch, YARN-3508.05.patch, YARN-3508.06.patch
>
>
> We recently saw the RM for a large cluster lag far behind on the AsyncDispacher event
queue.  The AsyncDispatcher thread was consistently blocked on the highly-contended CapacityScheduler
lock trying to dispatch preemption-related events for RMContainerPreemptEventDispatcher. 
Preemption processing should occur on the scheduler event dispatcher thread or a separate
thread to avoid delaying the processing of other events in the primary dispatcher queue.



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