IT45453: FDC with probe XC130003 and application received RC 2009 (connection broken) on channel with RCVEXIT and SHARECNV(1)

APAR status

• Closed as program error.

Error description

• When an MQ client application connected to a channel which was
  configured with send and receive channel exits the client
  application intermittently reported a MQRC 2009 connection
  broken error and the following FDC was generated on the MQ queue
  manager:
  
   Probe Id          :- XC130003
   Component         :- xehExceptionHandler
    Program Name      :- amqrmppa
   Major Errorcode   :- STOP
   Probe Type        :- HALT6109
   FDCSequenceNumber :- 0
    Arith1            :- 11 (0xb)
   Comment1          :- SIGSEGV: address not mapped(0x10)
  
  
  MQM Function Stack
  cciResponderThread
  ccxResponder
  rrxResponder
  ccxReceiveThreadFn
  cciProcessOne
  cciProcessUserData
  cciProcessAsyncRcv
  rriServerAsyncRcv
  rriMQIServerReceive
  rriMQIServerCall
  xcsFFST
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Those with applications that consume messages asynchronously
  over SVRCONN channels which are defined with receive exits and
  SHARECNV(1).
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A client application executed an MQI operation from within a
  callback function and the MQ server code attempted to invoke a
  receive exit, but a programming error caused the queue manager
  to incorrectly free a memory block which led to a SIGSEGV. This
  caused the channel to terminate abnormally and the client
  application received return code 2009 (MQRC_CONNECTION_BROKEN).
  

Problem conclusion

• The programming error has been fixed.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.3 LTS   9.3.0.20
  v9.4 LTS   9.4.0.5
  v9.x CD    9.4.1
  
  The latest available maintenance can be obtained from
  'IBM MQ Recommended Fixes'
  https://www.ibm.com/support/pages/recommended-fixes-ibm-mq
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'IBM MQ
  Planned Maintenance Release Dates'
  https://ibm.biz/mqplannedmaintenance
  
  ---------------------------------------------------------------
  

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

  MQ BASE V9.3

• Fixed component ID

  5724H7291

Applicable component levels