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Hadoop QA commented on MAPREDUCE-3944: -------------------------------------- -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12517109/MR-3944.txt against trunk revision . +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 9 new or modified tests. +1 javadoc. The javadoc tool did not generate any warning messages. -1 javac. The patch appears to cause tar ant target to fail. +1 eclipse:eclipse. The patch built with eclipse:eclipse. -1 findbugs. The patch appears to cause Findbugs (version 1.3.9) to fail. +1 release audit. The applied patch does not increase the total number of release audit warnings. -1 core tests. The patch failed the unit tests build +1 contrib tests. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2001//testReport/ Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2001//console This message is automatically generated. > 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: Bug > Components: mrv2 > Affects Versions: 0.23.1, 0.23.2 > Reporter: Robert Joseph Evans > Assignee: Robert Joseph Evans > Priority: Blocker > Attachments: 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira