IC82989: WMQFTE STOPPED PICKING UP MESSAGES. UPON RESTART MESSAGES ARE SENT TO THE DEAD LETTER QUEUE

WebSphere MQ File Transfer Edition V7.0 Fix Pack 7.0.4.2
WebSphere MQ V7.5 Fix Pack 7.5.0.1

APAR status

• Closed as program error.

Error description

• Error Description￘
  WMQFTE 7.04. If two transfers are submitted with the same
  transfer id this error will occur. Error logs show this seq
  ...
  Class:      com.ibm.wmqfte.cmdhandler.impl.FTECommandThread
  Method:     run
  Probe:      FFDC_001
  Cause:      com.ibm.wmqfte.cmdhandler.FTECommandHandlerError
  Exception: BFGCH0066E: An internal error has occurred. An
  exception has been reported by the State Store. The exception
  is null
  com.ibm.wmqfte.cmdhandler.FTECommandHandlerErrorException:
  BFGCH0066E: An internal error has occurred. An exception has
  been reported by the State Store. The exception is null
          at com.ibm.wmqfte.cmdhandler.impl.FTECommandHandler
           StateStoreImpl.processInternalCommand(FTECommandHandler
           StateStoreImpl.java:639)
          at com.ibm.wmqfte.cmdhandler.impl.MessageHandlerImpl.
           internalMessageHandler(MessageHandlerImpl.java:393)
          at com.ibm.wmqfte.cmdhandler.impl.MessageHandlerImpl.
           processCommand(MessageHandlerImpl.java:143)
          at com.ibm.wmqfte.cmdhandler.impl.MessageHandlerImpl.
           processCommand(MessageHandlerImpl.java:134)
          at com.ibm.wmqfte.cmdhandler.impl.FTECommandThread.
           run(FTECommandThread.java:259)
          at java.lang.Thread.run(Thread.java:736)
          at com.ibm.wmqfte.thread.FTEThread.run(FTEThread.
           java:64)
  Caused by: java.lang.NullPointerException
          at com.ibm.wmqfte.transfer.impl.TransferSenderRunnable.
           isComplete(TransferSenderRunnable.java:1438)
          at com.ibm.wmqfte.transfer.impl.TransferSenderImpl.
           onComplete(TransferSenderImpl.java:280)
          at com.ibm.wmqfte.statestore.impl.FTEStateStoreImpl.
           sendForgetToFarEnd(FTEStateStoreImpl.java:1340)
          at com.ibm.wmqfte.cmdhandler.impl.FTECommandHandler
           StateStoreImpl.processInternalCommand(FTECommand
           HandlerStateStoreImpl.java:580)
          ... 6 more
  ..
  Class:      com.ibm.wmqfte.cmdhandler.impl.MessageHandlerImpl
  Method:     externalMessageHandler
  Probe:      FFDC_001
  Cause:      com.ibm.wmqfte.cmdhandler.FTECommandHandlerError
               Exception: BFGCH0005E: A problem occurred when
               registering a file transfer request.
  com.ibm.wmqfte.cmdhandler.FTECommandHandlerErrorException:
           BFGCH0005E: A problem occurred when registering a
           file transfer request.
          at com.ibm.wmqfte.cmdhandler.impl.FTECommandHandler
           StateStoreImpl.processFileTransfer(FTECommandHandler
           StateStoreImpl.java:404)
          at com.ibm.wmqfte.cmdhandler.impl.FTECommandIntepreter
           FileTransfer.interpret(FTECommandIntepreterFile
           Transfer.java:281)
          at com.ibm.wmqfte.cmdhandler.impl.MessageHandlerImpl.
           externalMessageHandler(MessageHandlerImpl.java:207)
          at com.ibm.wmqfte.cmdhandler.impl.MessageHandlerImpl.
           processCommand(MessageHandlerImpl.java:145)
          at com.ibm.wmqfte.cmdhandler.impl.FTECommandHandler
           WorkerThread.processCommand(FTECommandHandlerWorker
           Thread.java:247)
          at com.ibm.wmqfte.cmdhandler.impl.FTECommandHandler
           WorkerThread.run(FTECommandHandlerWorkerThread.
           java:151)
          at java.lang.Thread.run(Thread.java:736)
          at com.ibm.wmqfte.thread.FTEThread.run(FTEThread.
           java:64)
  Caused by: com.ibm.wmqfte.statestore.FTEStateStoreException:
            BFGSS0020E: An internal error has occurred. Transfer
            ID 414d512057484c534c453150202020204e4a834f2099d4b6.
          at com.ibm.wmqfte.statestore.impl.FTEStateStore
           Persistence.putSender(FTEStateStorePersistence.
           java:1090)
          at com.ibm.wmqfte.statestore.impl.FTEStateStoreImpl.
           newSenderTransfer(FTEStateStoreImpl.java:733)
          at com.ibm.wmqfte.cmdhandler.impl.FTECommandHandlerState
           StoreImpl.processFileTransfer(FTECommandHandlerState
           StoreImpl.java:379)
          ... 7 more
  ...
  

Local fix

• Local Fix￘
  NA
  

Problem summary

• When a queueNotEmpty resource monitor runs with a short interval
  (2 seconds for example) it was possible for the monitor to
  trigger on the same message twice, thereby submitting 2
  transfers for the same message.
  
  USERS AFFECTED:
  All users of queueNotEmpty resource monitors
  
  PLATFORMS AFFECTED:
  All
  

Problem conclusion

• The code has been altered to eliminate the race condition.
  Regardless of the resource monitor interval, a single message
  will only trigger a single transfer.
  
  The fix for this APAR is currently targeted for inclusion in fix
  packs 7.0.4.1 and 7.5.0.1.
  

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

  WMQ FILE TRANSF

• Fixed component ID

  5724R1000

Applicable component levels

• R704 PSY

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