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Hadoop QA commented on MAPREDUCE-3566: -------------------------------------- -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12509321/MAPREDUCE-3566-20120103.txt against trunk revision . +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 11 new or modified tests. +1 javadoc. The javadoc tool did not generate any warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. +1 eclipse:eclipse. The patch built with eclipse:eclipse. -1 findbugs. The patch appears to introduce 1 new Findbugs (version 1.3.9) warnings. +1 release audit. The applied patch does not increase the total number of release audit warnings. +1 core tests. The patch passed unit tests in . +1 contrib tests. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1526//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1526//artifact/trunk/hadoop-mapreduce-project/patchprocess/newPatchFindbugsWarningshadoop-mapreduce-client-app.html Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1526//console This message is automatically generated. > MR AM slows down due to repeatedly constructing ContainerLaunchContext > ---------------------------------------------------------------------- > > Key: MAPREDUCE-3566 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3566 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: mr-am, mrv2 > Affects Versions: 0.23.0 > Reporter: Vinod Kumar Vavilapalli > Assignee: Vinod Kumar Vavilapalli > Priority: Critical > Fix For: 0.23.1 > > Attachments: MAPREDUCE-3566-20111215.txt, > MAPREDUCE-3566-20111220.txt, MAPREDUCE-3566-20120103.txt > > > The construction of the context is expensive, includes per-task trips to > NameNode for obtaining the information about job.jar, job splits etc which is > redundant across all tasks. > We should have a common job-level context and a task-specific context > inheriting from the common job-level context. -- 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