Haibo Chen created YARN-8921:
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Summary: SnapshotBasedOverAllocationPolicy incorrectly rounds
memory availabe int bytes
Key: YARN-8921
URL: https://issues.apache.org/jira/browse/YARN-8921
Project: Hadoop YARN
Issue Type: Sub-task
Affects Versions: YARN-1011
Reporter: Haibo Chen
Assignee: Haibo Chen
The memory overallocate threshold is a float, so is
(overAllocationThresholds.getMemoryThreshold() *
containersMonitor.getPmemAllocatedForContainers()). Because Math.round(float)
return an int, this would cap effectively the amount of memory available for
overallocation to Integer.MAX_VALUE, [see the code at
here|https://github.com/apache/hadoop/blob/fa864b8744cfdfe613a917ba1bbd859a5b6f70b8/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/scheduler/SnapshotBasedOverAllocationPolicy.java#L45]
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