IT27960: IBM MQ issues CO628001 ccxStageReAlloc rrcE_BAD_PARAMETER when SHARECNV(0)

APAR status

• Closed as program error.

Error description

• FDC issued-
  
  Probe Id          :- CO628001
  Component         :- ccxStageReAlloc
  Program Name      :- amqrmppa
  Major Errorcode   :- rrcE_BAD_PARAMETER
  Probe Description :- AMQ6125E: An internal IBM MQ error has
  occurred.
  
  MQM Function Stack
  ccxResponder
  rrxResponder
  rriMQIServer
  rriMQIServerReceive
  ccxStageReAlloc
  xcsFFST
  
  MQM Trace History
  .
  .
  } rriDecompress rc=OK
  { rriMQIServerReceive
  Data: 0x00033f06 0x000001e4
  -{ ccxStageReAlloc
  --{ xcsFFST
  
  The problem is in ccxPoolRealloc where an assumption and check
  is made that a primary conversation exists. This assumption is
  only correct when sharing conversations is negotiated to 1 or
  higher.
  

Local fix

• Set SHARECNV to 1 or higher
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Any user with clients that connect to a queue manager using a
  non-multiplexed channel connection may be affected.
  
  
  Platforms affected:
  AIX, IBM iSeries, Linux on Power, Linux on S390, Linux on
  x86-64, Linux on zSeries, Solaris x86-64, Solaris SPARC, Windows
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  An MQ client may cause a queue manager to need to resize a
  staging area buffer to handle the response of an MQI call. This
  may be needed where an MQI call returns a larger response than
  its request, the MQGET API is an example of such a call. The
  code that resizes the staging area on the queue manager side of
  the connection makes an invalid assumption that the connection
  is always using a multiplexed connection and incorrectly issues
  an FFST indicating a bad parameter.
  

Problem conclusion

• The buffer reallocation code that assumes a multiplexed
  connection is being used on the server is corrected to permit
  both multiplexed and non-multiplexed connections.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.1 CD    9.1.3
  v9.1 LTS   9.1.0.3
  
  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