Print the stack trace of InstanceAlreadyExistsException in trace level
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Key: HADOOP-8118
URL: https://issues.apache.org/jira/browse/HADOOP-8118
Project: Hadoop Common
Issue Type: Improvement
Components: metrics
Reporter: Tsz Wo (Nicholas), SZE
Assignee: Tsz Wo (Nicholas), SZE
Priority: Minor
There are many InstanceAlreadyExistsException stack traces in the unit tests
output like below.
{noformat}
javax.management.InstanceAlreadyExistsException:
Hadoop:service=NameNode,name=NameNodeInfo
at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:453)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1484)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:963)
...
{noformat}
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