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https://issues.apache.org/jira/browse/YARN-9697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16972291#comment-16972291
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Hudson commented on YARN-9697:
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SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #17630 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/17630/])
YARN-9697. Efficient allocation of Opportunistic containers. Contributed
(abmodi: rev fb512f50877438acb01fe6b3ec96c12b4db61694)
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/scheduler/OpportunisticContainerAllocator.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/scheduler/OpportunisticContainerContext.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/test/java/org/apache/hadoop/yarn/server/scheduler/TestOpportunisticContainerAllocator.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/TestCentralizedOpportunisticContainerAllocator.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/test/java/org/apache/hadoop/yarn/server/scheduler/TestDistributedOpportunisticContainerAllocator.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/CentralizedOpportunisticContainerAllocator.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/TestNodeQueueLoadMonitor.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/OpportunisticContainerAllocatorAMService.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/scheduler/DistributedOpportunisticContainerAllocator.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/distributed/NodeQueueLoadMonitor.java
> Efficient allocation of Opportunistic containers.
> -------------------------------------------------
>
> Key: YARN-9697
> URL: https://issues.apache.org/jira/browse/YARN-9697
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Abhishek Modi
> Assignee: Abhishek Modi
> Priority: Major
> Attachments: YARN-9697.001.patch, YARN-9697.002.patch,
> YARN-9697.003.patch, YARN-9697.004.patch, YARN-9697.005.patch,
> YARN-9697.006.patch, YARN-9697.007.patch, YARN-9697.008.patch,
> YARN-9697.009.patch, YARN-9697.ut.patch, YARN-9697.ut2.patch,
> YARN-9697.wip1.patch, YARN-9697.wip2.patch
>
>
> In the current implementation, opportunistic containers are allocated based
> on the number of queued opportunistic container information received in node
> heartbeat. This information becomes stale as soon as more opportunistic
> containers are allocated on that node.
> Allocation of opportunistic containers happens on the same heartbeat in which
> AM asks for the containers. When multiple applications request for
> Opportunistic containers, containers might get allocated on the same set of
> nodes as already allocated containers on the node are not considered while
> serving requests from different applications. This can lead to uneven
> allocation of Opportunistic containers across the cluster leading to
> increased queuing time
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