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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3944) JobHistory web services are slower then the UI and can easly overload the JH
Date Tue, 06 Mar 2012 20:27:58 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13223626#comment-13223626
] 

Hudson commented on MAPREDUCE-3944:
-----------------------------------

Integrated in Hadoop-Common-trunk-Commit #1843 (See [https://builds.apache.org/job/Hadoop-Common-trunk-Commit/1843/])
    MAPREDUCE-3944. Change the history jobs/ webservice to return partial job info for a significant
performance improvement. (Contributed by Robert Joseph Evans) (Revision 1297672)

     Result = SUCCESS
sseth : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1297672
Files : 
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/CompletedJob.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsWebServices.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/dao/JobInfo.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/MockHistoryJobs.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/webapp/TestHsWebServicesJobs.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/webapp/TestHsWebServicesJobsQuery.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/webapp/VerifyJobsUtils.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/HistoryServerRest.apt.vm

                
> JobHistory web services are slower then the UI and can easly overload the JH
> ----------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3944
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3944
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv2
>    Affects Versions: 0.23.1, 0.23.2
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Joseph Evans
>            Priority: Blocker
>             Fix For: 0.23.2
>
>         Attachments: MR-3944.txt, MR-3944.txt
>
>
> When our first customer started using the Job History web services today the History
Server ground to a halt.  We found 250 Jetty threads stuck on the following stack trace.
> {noformat}
>    java.lang.Thread.State: BLOCKED (on object monitor)
>         at org.apache.hadoop.mapreduce.v2.hs.JobHistory.getJob(JobHistory.java:898)
>         - waiting to lock <0x00002aaab364ba60> (a org.apache.hadoop.mapreduce.v2.hs.JobHistory)
>         at org.apache.hadoop.mapreduce.v2.hs.webapp.HsWebServices.getJobs(HsWebServices.java:188)
> {noformat}
> HsWebServices.java:188 corresponds to the /mapreduce/jobs service.
> Looking at the code there are a number of optimizations that need to be done to improve
its performance.

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