[HADOOP-8118] Print the stack trace of InstanceAlreadyExistsException in trace level

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.0.0-alpha
• Component/s: metrics
• Hadoop Flags: Reviewed
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 29/Feb/12 02:44
• Updated: 23/May/12 20:15
• Resolved: 29/Feb/12 20:01

Description

There are many InstanceAlreadyExistsException stack traces in the unit tests output like below.

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)
	...