IC80310: ABEND WITH CODE ABEND_001 CAUSED BY JAVA.NIO.CHANNELS.OVERLAPPINGFILELOCKEXCEPTION.

WebSphere MQ File Transfer Edition V7.0 Fix Pack 7.0.4.2

APAR status

• Closed as program error.

Error description

• Class:      com.ibm.wmqfte.thread.FTEThread
  Instance:   8a037f
  Method:     uncaughtException
  Probe:      ABEND_001
  Cause:      java.nio.channels.OverlappingFileLockException
  java.nio.channels.OverlappingFileLockException
          at
  sun.nio.ch.FileChannelImpl$SharedFileLockTable.checkList(FileCha
  nnelImpl.java:1173)
          at
  sun.nio.ch.FileChannelImpl$SharedFileLockTable.add(FileChannelIm
  pl.java:1075)
          at
  sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:881)
          at
  com.ibm.wmqfte.io.impl.FTEFileImpl.startsWith(FTEFileImpl.java:9
  68)
          at
  com.ibm.wmqfte.io.impl.FTEFileImpl.deleteTempFiles(FTEFileImpl.j
  ava:889)
          at
  com.ibm.wmqfte.io.impl.FTEFileChannelImpl.complete(FTEFileChanne
  lImpl.java:583)
          at
  com.ibm.wmqfte.io.impl.FTEFileChannelImpl.close(FTEFileChannelIm
  pl.java:517)
          at
  com.ibm.wmqfte.io.impl.FTEBufferedFileChannel.close(FTEBufferedF
  ileChannel.java:177)
          at
  com.ibm.wmqfte.io.FTEFilterFileChannel.close(FTEFilterFileChanne
  l.java:87)
          at
  com.ibm.wmqfte.io.impl.FTETextFileChannelImpl.close(FTETextFileC
  hannelImpl.java:353)
          at
  com.ibm.wmqfte.io.FTEFilterFileChannel.close(FTEFilterFileChanne
  l.java:80)
          at
  com.ibm.wmqfte.io.impl.FTETextFileChannelImpl.close(FTETextFileC
  hannelImpl.java:341)
          at
  com.ibm.wmqfte.transfer.impl.TransferReceiverRunnable.run(Transf
  erReceiverRunnable.java:649)
          at java.lang.Thread.run(Thread.java:619)
          at
  com.ibm.wmqfte.thread.FTEThread.run(FTEThread.java:52)
  ...
  System was able to be restarted.
  This APAR is to prevent the ABEND from occuring.
  

Local fix

• WMQFTE is restarted
  

Problem summary

• If IBM WebSphere MQ File Transfer Edition is unable to obtain a
  file lock when attempting to compare two files, it may ABEND
  with java.nio.channels.OverlappingFileLockException.
  
  This will only occur if one of the operands if unable to be
  locked. If the other operand of the compare is unable to be
  locked then an IOException will be thrown internally, which is
  handled gracefully by the agent (which may later retry).
  
  This APAR is applicable if the following can be seen within the
  ABEND file generated by the agent:
  
  1) Probe: ABEND_001
  2) Cause: java.nio.channels.OverlappingFileLockException
  3) The stack below the OverlappingFileLockException contains:
  com.ibm.wmqfte.io.impl.FTEFileImpl.startsWith(FTEFileImpl.java:#
  ##)
  
  USERS AFFECTED:
  All
  
  PLATFORMS AFFECTED:
  All
  

Problem conclusion

• The code has been altered to ensure that both operands of the
  compare are handled the same way. If the agent is unable to
  obtain a file lock on either of these files, then an IOException
  will be thrown and handled gracefully internally by the agent.
  The agent will no longer ABEND.
  
  The fix for this APAR is currently targeted for inclusion in fix
  pack 7.0.4.2.
  

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

• R703 PSY

     UP

• R704 PSY

     UP