Zoltan Haindrich created HADOOP-16435:
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Summary: RpcMetrics should not be retained forever
Key: HADOOP-16435
URL: https://issues.apache.org/jira/browse/HADOOP-16435
Project: Hadoop Common
Issue Type: Bug
Components: rpc-server
Reporter: Zoltan Haindrich
* RpcMetrics objects are registered into
[defaultmetricssystem|https://github.com/apache/hadoop/blob/85d9111a88f94a5e6833cd142272be2c5823e922/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/metrics/RpcMetrics.java#L101]
* although there is a shutdown() call (which is actually invoked) it doesn't
unregisters itself from the
[metricssystem|https://github.com/apache/hadoop/blob/85d9111a88f94a5e6833cd142272be2c5823e922/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/metrics/RpcMetrics.java#L185]
* RpcDetailedMetrics has the same issue
background
* hiveserver2 slowly eats up memory when running simple queries in new sessions
(select 1)
* every session opens a tezsession
* tezsession has rpcmetrics
* with a 150M heap after around 30 session the jvm gets outofmemmory
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