Clean up stack traces due to duplicate MXBean registration
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Key: HDFS-1531
URL: https://issues.apache.org/jira/browse/HDFS-1531
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node, name-node
Affects Versions: 0.22.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Trivial
In the minicluster unit tests, we try to register MXBeans for each DN, but
since the JMX context is JVM-wide, we get a InstanceAlreadyExistsException for
all but the first. This stack trace clutters test logs a lot.
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