IT34436: Zero byte content MQ messages gets generated during MFT File to Message transfers when using a prefix delimiter

APAR status

• Closed as program error.

Error description

• A file transfer takes place for a "file to message" transfer,
  using a prefix delimiter to split the file content across
  multiple MQ messages.
  
  The file which is being transferred had a total of 150
  delimiters within it, so it was expected that 150 messages would
  be produced on the queue - but instead 151 messages were
  produced.
  
  One of the generated messages on the queue had no message
  content, which was not expected.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users using MFT to perform file-to-message transfers, using a
  file prefix delimiter to split the file content across multiple
  messages.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  During  file-to-message transfer with a prefix delimiter, empty
  messages were seen in the destination queue.
  
  These empty message were created due to the way the MFT
  transfer-chunk with prefix delimiter processing was performed on
  the destination agent.
  
  The destination agent processed the received data chunk by
  prioritising complete lines with an End-Of-Line (EOL) character
  first, and incomplete lines without an EOL character were
  processed when the rest of the data arrived to the destination
  agent.
  
  If the incomplete line started with the prefix delimiter, then
  the destination agent created an empty content MQ message, which
  was then put to the destination queue for the file transfer.
  

Problem conclusion

• MFT file-to-message processing with prefix delimiter has been
  updated such that empty messages will not be generated when
  write buffer is empty.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.1 LTS   9.1.0.8
  v9.2 LTS   9.2.0.2
  v9.x CD    9.2.1
  
  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 V9.1

• Fixed component ID

  5724H7272

Applicable component levels