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Konstantin Shvachko commented on MAPREDUCE-2224: ------------------------------------------------ This is already committed to 0.22 and should go into a separate jira. Created MAPREDUCE-4314 to commit the patch. > Synchronization bugs in JvmManager > ---------------------------------- > > Key: MAPREDUCE-2224 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-2224 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: tasktracker > Affects Versions: 0.22.0 > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Priority: Critical > Fix For: 0.22.0 > > Attachments: mapreduce-2224-cdh3.txt, mapreduce-2224.txt, > mapreduce-2224.txt, mapreduce-2224.txt, mapreduce-2224.txt, > mr-2224-0.22.patch, mr-2224-0.22.patch > > > JvmManager.JvmManagerForType has several HashMap members that are > inconsistently synchronized. I've seen sporadic NPEs in the 0.20 version of > this code which has similar bugs. -- 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