IT38204: IBM MQ client applications stop consuming messages from a queue protected with AMS MCA interception.

APAR status

• Closed as program error.

Error description

• A queue manager has a queue protected with  Advanced Message
  Security(AMS) Message Channel Agent (MCA) interception. A client
  application that is trying to consume messages from the
  protected queue using a SVRCONN channel configured with SHARECNV
  greater than 1 receives one message and then repeated errors
  with Reason Code 2080(MQRC_TRUNCATED_MSG_FAILED) or no message
  and no error.
  

Local fix

• Use SHARECNV=1 to workaround the problem
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users using IBM MQ clients with SVRCONN channel(s) configured
  with SHARECNV greater than 1 and queue(s) protected with AMS MCA
  interception.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A defect in IBM MQ buffer size and consumer state management
  when processing an AMS message on the queue manager side caused
  the consume state to be left in suspended state incorrectly and
  this resulted in the queue manager not delivering messages to
  the waiting consumer.
  

Problem conclusion

• The IBM MQ code has been modified to correctly set the consumer
  state when processing AMS
  messages.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.1 LTS   9.1.0.10
  v9.2 LTS   9.2.0.4
  v9.x CD    9.2.5
  
  The latest available 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 BASE MP

• Fixed component ID

  5724H7271

Applicable component levels