Major Description
In JMXJsonServlet.java file, when invokes MBeanServer.getAttribute() method, many catch clauses followed, and each of them contains a log statement, most of them set the logging level to ERROR. However, when catches RuntimeErrorException in line 348 (r1839798), the logging level of log statement in this catch clause is DEBUG, the annotation indicates that an unexpected failure occured in getAttribute method before, so I think the logging level shuold be ERROR level too.