Java Database Connectivity (JDBC)

I have problem with starting jdbc trace facility. I have tried to follow instructions on page http://www.oracle.com/technology/tech/java/sqlj_jdbc/htdocs/jdbc_faq.html#36_00 but it is not working:

CODE:
// create name
javax.management.ObjectName name = new javax.management.ObjectName("com.oracle.jdbc:type=diagnosibility,name=*");
// get the MBean server
javax.management.MBeanServer mbs = java.lang.management.ManagementFactory.getPlatformMBeanServer();
// find out if logging is enabled or not
System.out.println("LoggingEnabled = " + mbs.getAttribute(name, "LoggingEnabled"));
// enable logging
mbs.setAttribute(name, new javax.management.Attribute("LoggingEnabled", true));
// disable logging
mbs.setAttribute(name, new javax.management.Attribute("LoggingEnabled", false));

ERROR:
javax.management.InstanceNotFoundException: com.oracle.jdbc:type=diagnosibility,name=*
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1094)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:662)
at com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:638)
at com.onsemi.cim.apps.commoninterface.EventProcessingWorker.main(EventProcessingWorker.java:714)

Can you please help me and advice what am I doing wrong.

BTW: I am trying to start logging due to "ORA-12155: TNS:received bad datatype in NSWMARKER packet". Does any one any experience with it? For example what is causing it?