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Posted to issues@tez.apache.org by "Siddharth Seth (JIRA)" <ji...@apache.org> on 2014/09/03 01:38:51 UTC
[jira] [Resolved] (TEZ-1515) DAGAppMaster : Thread contentions due
to org.apache.tez.common.counters.ResourceBundles
[ https://issues.apache.org/jira/browse/TEZ-1515?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Siddharth Seth resolved TEZ-1515.
---------------------------------
Resolution: Fixed
> 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
> Assignee: Rajesh Balamohan
> Labels: performance
> Attachments: DAGAppMaster_AsyncDispatcher.png, HistoryLoggingService.png, RecoveryService.png, TEZ-1515.1.patch, TEZ-1515.2.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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