lindongdong created YARN-9376:
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Summary: too many ContainerIdComparator is not necessary
Key: YARN-9376
URL: https://issues.apache.org/jira/browse/YARN-9376
Project: Hadoop YARN
Issue Type: Improvement
Components: resourcemanager
Affects Versions: 3.1.2, 3.1.1
Reporter: lindongdong
One RMNodeImpl will create a new ContainerIdComparator instance, but it is not
necessary.
we may keep a static ContainerIdComparator instance is enough.
org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNodeImpl#containersToClean
{code:java}
/* set of containers that need to be cleaned */
private final Set<ContainerId> containersToClean = new TreeSet<ContainerId>(
new ContainerIdComparator());
{code}
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