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Todd Lipcon commented on HADOOP-6269: ------------------------------------- Konstantin: Given that we couldn't reproduce this regularly, I think it was in actuality a different thread doing the modification. With a brief look I don't see any way in which loadResource itself could modify defaultResources - it doesn't run user code or load any classes. > Missing synchronization for defaultResources in Configuration.addResource > ------------------------------------------------------------------------- > > Key: HADOOP-6269 > URL: https://issues.apache.org/jira/browse/HADOOP-6269 > Project: Hadoop Common > Issue Type: Bug > Components: conf > Affects Versions: 0.20.1 > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Fix For: 0.20.2, 0.21.0 > > Attachments: hadoop-6269.txt > > > Configuration.defaultResources is a simple ArrayList. In two places in > Configuration it is accessed without appropriate synchronization, which we've > seen to occasionally result in ConcurrentModificationExceptions. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.