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Chen Yufei commented on YARN-8513: ---------------------------------- [~yuanbo] I'll capture those info when I encounter this problem again next time. Currently I don't know the exact trigger condition for the problem, so have to wait for some time. > CapacityScheduler infinite loop when queue is near fully utilized > ----------------------------------------------------------------- > > Key: YARN-8513 > URL: https://issues.apache.org/jira/browse/YARN-8513 > Project: Hadoop YARN > Issue Type: Bug > Components: capacity scheduler, yarn > Affects Versions: 2.9.1 > Environment: Ubuntu 14.04.5 > YARN is configured with one label and 5 queues. > Reporter: Chen Yufei > Priority: Major > > ResourceManager does not respond to any request when queue is near fully > utilized sometimes. Sending SIGTERM won't stop RM, only SIGKILL can. After RM > restart, it can recover running jobs and start accepting new ones. > > Seems like CapacityScheduler is in an infinite loop printing out the > following log messages (more than 25,000 lines in a second): > > {{2018-07-10 17:16:29,227 INFO > org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue: > assignedContainer queue=root usedCapacity=0.99816763 > absoluteUsedCapacity=0.99816763 used=<memory:16170624, vCores:1577> > cluster=<memory:29441544, vCores:5792>}} > {{2018-07-10 17:16:29,227 INFO > org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler: > Failed to accept allocation proposal}} > {{2018-07-10 17:16:29,227 INFO > org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.allocator.AbstractContainerAllocator: > assignedContainer application attempt=appattempt_1530619767030_1652_000001 > container=null > queue=org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.allocator.RegularContainerAllocator@14420943 > clusterResource=<memory:29441544, vCores:5792> type=NODE_LOCAL > requestedPartition=}} > > I encounter this problem several times after upgrading to YARN 2.9.1, while > the same configuration works fine under version 2.7.3. > > YARN-4477 is an infinite loop bug in FairScheduler, not sure if this is a > similar problem. > -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org