[ 
https://issues.apache.org/jira/browse/HADOOP-16435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Akira Ajisaka updated HADOOP-16435:
-----------------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 3.1.3
                   2.9.3
                   3.2.1
                   2.8.6
                   3.3.0
                   2.10.0
           Status: Resolved  (was: Patch Available)

Committed this to trunk, branch-3.2, branch-3.1, branch-2, branch-2.9, and 
branch-2.8.
Thanks [~kgyrtkirk] for the contribution and thanks [~Jack-Lee] for the 
comments.

> 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
>            Assignee: Zoltan Haindrich
>            Priority: Critical
>             Fix For: 2.10.0, 3.3.0, 2.8.6, 3.2.1, 2.9.3, 3.1.3
>
>         Attachments: HADOOP-16435.01.patch, classes.png, 
> defaultMetricsHoldsRpcMetrics.png, related.jxray.png, rpcm.hprof.xz
>
>
> * 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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