IT16874: BFGSS0067W unable to delete the source file due to the IOException: BFGIO0033E: there is an invalid checksum

APAR status

• Closed as program error.

Error description

• File Transfer Edition (FTE) has a transfer that receives
  BFGSS0067W: The file has transferred successfully but the
   source agent was unable to delete the source file due to the
   following IOException:
   'BFGIO0033E: There is an invalid checksum for file
   <file name> and recovery is not possible'
  
  The explanation of the error is:
   BFGIO0033E
    There is an invalid checksum for file <insert_0> and recovery
    is not possible.
   Severity
   20 : Error
   Explanation
   A transfer of the file failed part way through. During the
   recovery operation the system discovered the contents of the
   file had been changed.
   Response
   Resubmit the transfer request again, if required.
  
  However, the file was not changing during the transfer.
  
  In a trace, the checksum values for both the source and
  destination are the same.
  
  The problem happens when an I/O user exit (IOExit) is used, for
  instance with FTEQDLSExit in use for IBM i QDLS files.
  

Local fix

• Set maxInlineFileSize=0 in the agent.properties file
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of an IOExit, such as FTEQDLSExit, performing
  transfers with source disposition delete.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  In certain circumstances IBM MQ File Transfer Edition is unable
  to delete the source file whilst holding the lock on that file.
  One such scenario is when 'maxInlineFileSize' has been
  configured in the agent.properties file with a value of greater
  than zero. When unable to delete the file when holding the file
  lock, an attempt is made to delete the file without the lock in
  place. In this circumstance the agent checks that the checksum
  of the file to be deleted matches the checksum of what was
  transferred, this protects against deleting a file which has
  subsequently changed thus losing data.
  
  When the agent invoked an IOExit to calculate the checksum on a
  file it incorrectly appended a number of zero bytes to the
  checksum which were not present in the file. This resulted in a
  different checksum to the file actually transferred, and so the
  agent failed with BFGIO0033E as it believed the file had changed
  since transferred. The file had actually not changed but the
  method to calculate the checksum was in error.
  

Problem conclusion

• The code which invokes an IOExit to calculate the checksum on a
  file has been modified to ensure that it calculates the checksum
  correctly, thereby preventing the BFGIO0033E. BFGIO0033E will
  still be seen where the file has actually changed as is the
  expected behaviour.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.0       7.0.4.7
  v7.5       7.5.0.8
  v8.0       8.0.0.6
  v9.0 CD    9.0.1
  v9.0 LTS   9.0.0.1
  
  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:

• 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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