Lantao Jin created YARN-9394:
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Summary: Use new API of RackResolver to get better performance
Key: YARN-9394
URL: https://issues.apache.org/jira/browse/YARN-9394
Project: Hadoop YARN
Issue Type: Improvement
Components: yarn
Affects Versions: 3.3.0, 3.2.1
Reporter: Lantao Jin
Assignee: Lantao Jin
After adding a new API in RackResolver YARN-9332, some old callers should
switch to new API to get better performance. As an example, Spark
[YarnAllocator|https://github.com/apache/spark/blob/733f2c0b98208815f8408e36ab669d7c07e3767f/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala#L361-L363]
for Dynamic Allocation invokes
[https://github.com/apache/hadoop/blob/6fa229891e06eea62cb9634efde755f40247e816/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/impl/AMRMClientImpl.java#L550]
to resolve racks in a loop.
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