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Hadoop QA commented on MAPREDUCE-3343: -------------------------------------- -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12502735/bug-fix-avoid-memory-leak-in-TrackerDistributedCacheManager.patch against trunk revision . +1 @author. The patch does not contain any @author tags. -1 tests included. The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch. -1 patch. The patch command could not apply the patch. Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1255//console This message is automatically generated. > TaskTracker Out of Memory because of distributed cache > ------------------------------------------------------ > > Key: MAPREDUCE-3343 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3343 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: mrv1 > Affects Versions: 0.20.205.0 > Reporter: Ahmed Radwan > Labels: mapreduce, patch > Attachments: > bug-fix-avoid-memory-leak-in-TrackerDistributedCacheManager.patch > > > This Out of Memory happens when you run large number of jobs (using the > distributed cache) on a TaskTracker. > Seems the basic issue is with the distributedCacheManager (instance of > TrackerDistributedCacheManager in TaskTracker.java), this gets created during > TaskTracker.initialize(), and it keeps references to > TaskDistributedCacheManager for every submitted job via the jobArchives Map, > also references to CacheStatus via cachedArchives map. I am not seeing these > cleaned up between jobs, so this can out of memory problems after really > large number of jobs are submitted. We have seen this issue in a number of > cases. -- 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