Getting java.lang.NullPointerException errors in APM 10.0.1 Wily CTG agent log.
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Getting java.lang.NullPointerException errors in APM 10.0.1 Wily CTG agent log.


Article ID: 8300


Updated On:


CA Application Performance Management Agent (APM / Wily / Introscope) INTROSCOPE


 APM java agent (10.0.1 with CTG PowerPack enabled) repeatedly shows the following Exception in agent log file:

  at com.wily.introscope.agent.trace.InvocationData.IMethodTracer_startTrace(                              
  at com.wily.introscope.agent.trace.TracerAdministrator.loadTracer(                                   
  at com.wily.introscope.agent.enterprise.EnterpriseAgent.IAgent_loadTracer(                               
  at com.wily.introscope.agent.AgentShim.ProbeBuilderEntryPoint_loadTracer(                                     
  at Source)                                                                 
  at Source)                                                                    
  at Source)                                                                                  


OS: z/OS 02.02.00 CTG Server JRE 1.8.0 IBM J9 2.8 z/OS s390x-64 Compressed Reference Agent Release The APM Agent is using PPCTGServer-full.pbd.


 CTG Client is sending an ECI request to the CTG server with a not populated "Server" field. Due to refactoring introduced in 2/2012 with the APM agent using the CTG PP, the CTG PP code is sensitive to this. Thus, APM agent is getting the Exception.


 1. Stop APM agent.

 2. Make a backup copy of agent profile.

 3. Edit the agent profile as follows:

 4. Replace PPCTGServer-full.pbd with PPCTGServer-typical.pbd in the following property in the Agent profile. 

 5. Start APM agent.