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Hudson commented on YARN-4066: ------------------------------ SUCCESS: Integrated in Hadoop-Yarn-trunk-Java8 #467 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/467/]) YARN-4066. Large number of queues choke fair scheduler. (Johan Gustavsson via kasha) (kasha: rev a0b5a0a419dfc07b7ac45c06b11b4c8dc7e79958) * hadoop-yarn-project/CHANGES.txt * hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/QueueManager.java > Large number of queues choke fair scheduler > ------------------------------------------- > > Key: YARN-4066 > URL: https://issues.apache.org/jira/browse/YARN-4066 > Project: Hadoop YARN > Issue Type: Bug > Components: fairscheduler > Affects Versions: 2.7.1 > Reporter: Johan Gustavsson > Assignee: Johan Gustavsson > Fix For: 2.8.0 > > Attachments: YARN-4066-2.patch, YARN-4066-3.patch, yarn-4066-1.patch > > > Due to synchronization and all the loops performed during queue creation, > setting a large amount of queues (12000+) will completely choke the > scheduler. To deal with this some optimization to > "QueueManager.updateAllocationConfiguration(AllocationConfiguration > queueConf)" should be done to reduce the amount of unnesecary loops. The > attached patch have been tested to work with atleast 96000 queues. -- This message was sent by Atlassian JIRA (v6.3.4#6332)