Missing synchronization for defaultResources in Configuration.addResource
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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
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.
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