After enabling the MQ Monitor agent for MQ Tracing on agent startup this exception occurs:
Exception in thread "MQDLQReader-DEVGPP01|NABNPDGMQDEVM1" java.lang.NoClassDefFoundError: com.ibm.mq.pcf.activity.ActivityData
MQ Tracing with APM requires the MQ Activity recording/reporting feature to track message routing.
The corresponding class "com.ibm.mq.pcf.activity.ActivityData" is contained in 3rd party WebSphere MQ Broker library com.ibm.mq.pcf-6.1.jar which needs to be in the agent Java CLASSPATH
Per the APM documentation for the extension for IBM WebSphere MQ the startMQMonitor.sh(.bat) file needs to have the PCF_JAR variable set to the location of com.ibm.mq.pcf-6.1.jar file. PCF_JAR is then included in the Java CLASSPATH for the agent startup
The IBM 3rd party library file ms0b.zip containing com.ibm.mq.pcf-6.1.jar may no longer be available for download but can be accessed from here:
See "[ERROR] TraceManager.startUp ClassNotFoundException ..."