IT13097: WMQ MFT V8: AGENT ENDS ABNORMALLY WITHJAVA.LANG.NULLPOINTEREXCEPTION ERROR

APAR status

• Closed as program error.

Error description

• When using IBM MQ Managed File Transfer if a transfer fails with
  an MQ error, for
  instance a queue definition is missing and generates error
  MQRC=2196 (MQRC_UNKNOWN_XMIT_Q), then the MFT agent may end
  abnormally with a java.lang.NullPointerException error.
  
  An ABEND file is generated with following details:
  
    Class:      com.ibm.wmqfte.thread.FTEThread
    Method:     uncaughtException
    Probe:      ABEND_001
    Cause:      java.lang.NullPointerException
    java.lang.NullPointerException
    at com.ibm.wmqfte.transfer.impl.TransferSenderRunnable.
      closeFile(TransferSenderRunnable.java:1548)
    at com.ibm.wmqfte.transfer.impl.TransferSenderImpl.
      closeFile(TransferSenderImpl.java:343)
    at com.ibm.wmqfte.statestore.impl.FTEMutableSenderState.
      processSourceDisposition(FTEMutableSenderState.java:994)
    at com.ibm.wmqfte.statestore.impl.FTEMutableSenderState.
      addProgressAudit(FTEMutableSenderState.java:696)
    at com.ibm.wmqfte.statestore.impl.FTEMutableSenderState.
      createFailureAudit(FTEMutableSenderState.java:1180)
    at com.ibm.wmqfte.statestore.impl.FTEStateStoreImpl.
      failTransfer(FTEStateStoreImpl.java:4707)
    at com.ibm.wmqfte.transfer.eventlistener.
      SenderTransferEventListener$EventRunnable.run
      (SenderTransferEventListener.java:312)
    at java.lang.Thread.run(Thread.java:801)
    at com.ibm.wmqfte.thread.FTEThread.run(FTEThread.java:70)
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects all users of IBM MQ v8 Managed File Transfer.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  If an IBM MQ Managed File Transfer agent, that is acting as the
  source agent for a managed transfer, cannot communicate with the
  destination agent over the IBM MQ network due to a
  non-recoverable error, then a new managed transfer cannot be
  negotiated between the two agents.  In this case, the source
  agent will fail the transfer.  A example of a non-recoverable
  error is the IBM MQ reason code 2196 (MQRC_UNKNOWN_XMIT_Q).
  
  As part of the managed transfer failure processing, the agent
  attempted to free any resources it had created for the managed
  transfer that was being failed, which included closing any open
  file handles to source files.  However, the agent did not check
  that the Java objects wrapping the source file handles had
  indeed been previously created.  As such, when it attempted to
  interact with these Java objects, an uncaught
  java.lang.NullPointerException was thrown that caused the agent
  to end abnormally.
  

Problem conclusion

• The IBM MQ Managed File Transfer source agent code has been
  updated to check that the appropriate Java objects that wrap
  file handles have been created and are not null, before
  attempting to close said file handles.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v8.0       8.0.0.5
  
  The latest available FTE maintenance can be obtained from
  'Fix List for WebSphere MQ File Transfer Edition 7.0'
  http://www-01.ibm.com/support/docview.wss?uid=swg27015313
  
  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:

  PI50773

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

Fix information

• Fixed component name

  WMQ MFT V8.0

• Fixed component ID

  5724H7252

Applicable component levels

• R800 PSY

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