IV67646: FDCS WITH PROBE ID RM575000 FROM RSTSENDASYNCMESSAGE

APAR status

• Closed as program error.

Error description

• After upgrading a queue manager to v7 the customer saw FDCs
  continuously generated for a channel indicating a
  problem with the message length.
  FDCs generated showed:
  Probe Id :- RM575000
  Component :- rstSendAsyncMessage
  Program Name :- amqrmppa
  Arith1 :- 2048 (0x800)
  Arith2 :- 150994944 (0x9000000)
  Comment1 :- Message length error
  
  MQM Function Stack
  ccxResponder
  rrxResponder
  ccxReceiveThreadFn
  cciProcessUserData
  cciProcessAsyncRcv
  rriServerAsyncRcv
  rstReceiveMessageRequest
  rstCheckForOneMessage
  rstSendAsyncMessage
  xcsFFST
  
  It was also noted when an MQ trace was started the FDCs were no
  longer generated.
  

Local fix

• Customer was able to workaround the issue by setting SHARECNV(0)
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users using fetching messages with get message option
  MQGMO_UNLOCK
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When MQGMO_UNLOCK is specified, the datalength used in the
  asynchronous get within the queue manager will not be updated.
  This will result in an incorrect value being used, which may be
  larger or smaller than expected. When the value here is
  incorrect, an internal check fails later and the FDC with probe
  ID RM575000 is written. The actual MQGET being performed will
  not fail, and the message will be delivered.
  

Problem conclusion

• The code has been altered to ensure that the datalength not
  being set when using MQGMO_UNLOCK is expected, and that it is
  correctly initialized before use within the internal
  asynchronous get call.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.0       7.0.1.13
  v7.1       7.1.0.7
  v7.5       7.5.0.6
  
  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 AIX V7

• Fixed component ID

  5724H7221

Applicable component levels

• R701 PSY

     UP