IT25113: MQ MFT agent abend with NullPointerException probe ABEND_001

APAR status

• Closed as program error.

Error description

• Managed File Transfer agent abend when starting up a Resource
  Monitor during agent shutdown. The abend occurs due to a
  java.lang.NullPointerException and an abend FDC is generated:
  
  Class:        com.ibm.wmqfte.thread.FTEThread
  Instance:    d34c8909
  Method:     uncaughtException
  Probe:        ABEND_001
  Cause:       java.lang.NullPointerException
  java.lang.NullPointerException
   at
  com.ibm.wmqfte.monitor.management.MonitorPublication.getPublicat
  ionXML(MonitorPublication.java:94)
   at
  com.ibm.wmqfte.monitor.management.MonitorManager.startMonitor(Mo
  nitorManager.java:652)
   at
  com.ibm.wmqfte.monitor.management.MonitorManager.registerMonitor
  (MonitorManager.java:940)
   at
  com.ibm.wmqfte.monitor.management.MonitorManager.recoveryMonitor
  (MonitorManager.java:781)
   at
  com.ibm.wmqfte.agent.AgentRecoveryRunnable.recoverResourceMonito
  r(AgentRecoveryRunnable.java:851)
   at
  com.ibm.wmqfte.agent.AgentRecoveryRunnable.run(AgentRecoveryRunn
  able.java:225)
   at java.lang.Thread.run(Thread.java:785)
   at com.ibm.wmqfte.thread.FTEThread.run(FTEThread.java:70)
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects users of IBM MQ Managed File Transfer who use
  resource monitors.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  This problem occurred due to a timing window when an MFT agent
  was shutting down, and starting up a MFT resource monitor (RM)
  at the same time. These two operations were executed under
  separate threads within the agent. The shutdown thread removed
  the object that represented an instance of the RM, while the
  recovery thread tried to start the RM using the removed object.
  This resulted in a  java.lang.NullPointerException, which caused
  the agent to abend.
  

Problem conclusion

• IBM MQ Managed File Transfer has been updated so that if an MFT
  agent is shutting down, it will not attempt to start a Resource
  Monitor.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.0 LTS   9.0.0.6
  v9.1 CD    9.1.1
  v9.1 LTS   9.1.0.1
  
  The latest available MQ maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  IBM MQ MFT V9.0

• Fixed component ID

  5724H7262

Applicable component levels