Hemanth Boyina created HADOOP-19519:
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Summary: Performance overhead in Client.java due to Increased
threads creation
Key: HADOOP-19519
URL: https://issues.apache.org/jira/browse/HADOOP-19519
Project: Hadoop Common
Issue Type: Bug
Components: ipc
Affects Versions: 3.3.6, 3.3.5
Reporter: Hemanth Boyina
Assignee: Hemanth Boyina
In client.java before HADOOP-18324 , rpc connection class used
newCachedThreadPool, which reuses previously constructed threads if they are
available else create new.
In the HADOOP-18324, This has been modified to create new single thread every
time and threads will not be reused for other tasks once it completes its
execution.
Because of this change, there is overhead in the total number threads created
over the lifespan of a client jvm, for example a Hive Metastore. This overhead
leads to slight performance latency in our applications.
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