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Hadoop QA commented on MAPREDUCE-3813: -------------------------------------- +1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12513387/MAPREDUCE-3813-20120205.txt against trunk revision . +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 2 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 does not introduce any 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/1785//testReport/ Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1785//console This message is automatically generated. > RackResolver should maintain a cache to avoid repetitive lookups. > ----------------------------------------------------------------- > > Key: MAPREDUCE-3813 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3813 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: mrv2, performance > Affects Versions: 0.23.0 > Reporter: Vinod Kumar Vavilapalli > Assignee: Vinod Kumar Vavilapalli > Fix For: 0.23.1 > > Attachments: MAPREDUCE-3813-20120205.txt > > > With the current code, during task creation, we repeatedly resolve hosts and > RackResolver doesn't cache any of the results. Caching will improve > 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