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https://issues.apache.org/jira/browse/TEZ-1515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14114598#comment-14114598
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Siddharth Seth commented on TEZ-1515:
-------------------------------------
And open a follow up jira to support displayNames better.
> DAGAppMaster : Thread contentions due to
> org.apache.tez.common.counters.ResourceBundles
> ---------------------------------------------------------------------------------------
>
> Key: TEZ-1515
> URL: https://issues.apache.org/jira/browse/TEZ-1515
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Rajesh Balamohan
> Labels: performance
> Attachments: DAGAppMaster_AsyncDispatcher.png,
> HistoryLoggingService.png, RecoveryService.png, TEZ-1515.1.patch,
> detailed_sample_stack_trace.txt
>
>
> Thread profiling DagAppMaster for a synthetic tez test revealed lots of
> contentions in RecoveryService / HistoryEventHandlingThread / AsyncDispatcher
> threads. All of these try to access tez counters and are blocked on "public
> static synchronized <T> T getValue(String bundleName, String key,String
> suffix, T defaultValue)".
> I will attach the thread profiler snapshots soon.
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