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ASF GitHub Bot commented on YARN-4212: -------------------------------------- Github user kambatla commented on a diff in the pull request: https://github.com/apache/hadoop/pull/181#discussion_r97641986 --- Diff: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FifoPolicy.java --- @@ -132,4 +133,12 @@ public Resource getHeadroom(Resource queueFairShare, public byte getApplicableDepth() { return SchedulingPolicy.DEPTH_LEAF; } + + @Override + public boolean isChildPolicyAllowed(SchedulingPolicy childPolicy) + throws AllocationConfigurationException { + throw new AllocationConfigurationException(getName() + " policy is only for" --- End diff -- return false > FairScheduler: Parent queues is not allowed to be 'Fair' policy if its > children have the "drf" policy > ----------------------------------------------------------------------------------------------------- > > Key: YARN-4212 > URL: https://issues.apache.org/jira/browse/YARN-4212 > Project: Hadoop YARN > Issue Type: Bug > Reporter: Arun Suresh > Assignee: Yufei Gu > Labels: fairscheduler > Attachments: YARN-4212.002.patch, YARN-4212.003.patch, > YARN-4212.004.patch, YARN-4212.005.patch, YARN-4212.006.patch, > YARN-4212.007.patch, YARN-4212.1.patch > > > The Fair Scheduler, while performing a {{recomputeShares()}} during an > {{update()}} call, uses the parent queues policy to distribute shares to its > children. > If the parent queues policy is 'fair', it only computes weight for memory and > sets the vcores fair share of its children to 0. > Assuming a situation where we have 1 parent queue with policy 'fair' and > multiple leaf queues with policy 'drf', Any app submitted to the child queues > with vcore requirement > 1 will always be above fairshare, since during the > recomputeShare process, the child queues were all assigned 0 for fairshare > vcores. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org