IT22258: MQ generates unnecessary FDCs with probe IDs ZS402095 and RM575000 if an API exit changes the message length

APAR status

• Closed as program error.

Error description

• If an MQ API exit changes the message length the queue manager
  may generate unnecessary FDCs with Probe Ids ZS402095 and
  RM575000.
  
  Probe Id          :- ZS402095
  Component         :- zstAsyncConsume
  Thread            :- 5    AsyncConsume
  Arith1            :- 6 (0x6)
  Arith2            :- 5 (0x5)
  Comment1          :- Message length error
  
  MQM Function Stack
  zstAsyncConsumeThread
  zstAsyncConsume
  xcsFFST
  
  MQM Trace History
  ...
  ---} ziiMQGETM rc=OK
  --} zstMQGETM rc=OK
  ...
  ---{ APIExit
  ---} APIExit rc=OK
  --} zutCallApiExitsDataConvGet rc=OK
  --{ vpiConvertData
  ---{ xcsIsEnvironment
  ---} xcsIsEnvironment rc=OK
  --} vpiConvertData rc=OK
  --{ xcsFFST
  
  Probe Id          :- RM575000
  Component         :- rstSendAsyncMessage
  Thread            :- 5    AsyncConsume
  Arith1            :- 5 (0x5)
  Arith2            :- 6 (0x6)
  Comment1          :- Message length error
  
  MQM Function Stack
  zstAsyncConsumeThread
  zstAsyncConsume
  zstUserCallback
  zstConsumerFunction
  rstConsumer
  rstSendAsyncMessage
  xcsFFST
  
  MQM Trace History
  ...
  ----{ rstConsumer
  -----{ rstSendAsyncMessage
  ------{ xcsFFST
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users using async consume with an API exit (data conversion
  exit).
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  This problem occurred because the message length in an internal
  data structure was not updated correctly by the queue manager
  after invoking API exits, which caused an error during
  subsequent message length validation.
  

Problem conclusion

• The MQ queue manager logic has been modified to correctly update
  the message length in this internal structure after calling API
  exits.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.5       7.5.0.9
  v8.0       8.0.0.10
  v9.0 LTS   9.0.0.4
  
  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

  WMQ BASE MULTIP

• Fixed component ID

  5724H7251

Applicable component levels