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https://issues.apache.org/jira/browse/YARN-3367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15369720#comment-15369720
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Hudson commented on YARN-3367:
------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #10074 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/10074/])
YARN-3367. Replace starting a separate thread for post entity with event 
(sjlee: rev 0d02ab8729630ad3cfb4300702927333b1d349e3)
* 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/jobhistory/JobHistoryEventHandler.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/client/api/impl/TimelineClientImpl.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/api/async/impl/AMRMClientAsyncImpl.java
* 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/JobHistoryFileReplayMapper.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/client/api/TimelineClient.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-distributedshell/src/main/java/org/apache/hadoop/yarn/applications/distributedshell/ApplicationMaster.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/timelineservice/TimelineEntities.java
* 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TimelineEntityConverter.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestTimelineClientV2Impl.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/NodeStatusUpdaterImpl.java


> Replace starting a separate thread for post entity with event loop in 
> TimelineClient
> ------------------------------------------------------------------------------------
>
>                 Key: YARN-3367
>                 URL: https://issues.apache.org/jira/browse/YARN-3367
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Junping Du
>            Assignee: Naganarasimha G R
>              Labels: yarn-2928-1st-milestone
>             Fix For: YARN-2928
>
>         Attachments: YARN-3367-YARN-2928.v1.005.patch, 
> YARN-3367-YARN-2928.v1.006.patch, YARN-3367-YARN-2928.v1.007.patch, 
> YARN-3367-YARN-2928.v1.008.patch, YARN-3367-YARN-2928.v1.009.patch, 
> YARN-3367-YARN-2928.v1.010.patch, YARN-3367-YARN-2928.v1.011.patch, 
> YARN-3367-YARN-2928.v1.012.patch, YARN-3367-YARN-2928.v1.013.patch, 
> YARN-3367-YARN-2928.v1.014.patch, YARN-3367-feature-YARN-2928.003.patch, 
> YARN-3367-feature-YARN-2928.v1.002.patch, 
> YARN-3367-feature-YARN-2928.v1.004.patch, YARN-3367.YARN-2928.001.patch, 
> sjlee-suggestion.patch
>
>
> Since YARN-3039, we add loop in TimelineClient to wait for 
> collectorServiceAddress ready before posting any entity. In consumer of  
> TimelineClient (like AM), we are starting a new thread for each call to get 
> rid of potential deadlock in main thread. This way has at least 3 major 
> defects:
> 1. The consumer need some additional code to wrap a thread before calling 
> putEntities() in TimelineClient.
> 2. It cost many thread resources which is unnecessary.
> 3. The sequence of events could be out of order because each posting 
> operation thread get out of waiting loop randomly.
> We should have something like event loop in TimelineClient side, 
> putEntities() only put related entities into a queue of entities and a 
> separated thread handle to deliver entities in queue to collector via REST 
> call.



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