IC82482: WEBSPHERE MQ V7.1: CLIENT CONNECTIONS DROP BECAUSE CHANNEL POOLING PROCESS TERMINATES UNEXPECTEDLY.

Fix Pack 7.1.0.2 for WebSphere MQ V7.1
WebSphere MQ V7.5 Fix Pack 7.5.0.2
WebSphere MQ v7.5.0.2 Hypervisor for RHEL

APAR status

• Closed as program error.

Error description

• When running with WebSphere MQ V7.1, an access violation occurs
  in the amqrmppa process, with the following in the FDC:
  
  Probe id: XC130031
  Component: xehExceptionHandler
  Major Errorcode: xecF_E_UNEXPECTED_SYSTEM_RC
  Comment1: Access Violation at address 47959068 when reading
  
  MQM Function Stack
  zstAsyncConsumeThread
  xcsFFST
  

Local fix

• Local Fix￘
  None
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of WebSphere MQ V7.1 with client connections where
  SHARECNV on the channel is set to 1 or more.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  When a client connection ended memory was being accessed after
  it had been freed. This caused an access violation, causing the
  amqrmppa process to terminate unexpectedly, dropping
  connections. This only occurred when SHARECNV on the channel was
  set to 1 or more.
  

Problem conclusion

• The code was reordered to ensure that the memory for the
  connection was not being accessed after it had been freed.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.1       7.1.0.2
  v7.5       7.5.0.2
  
  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 WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R710 PSY

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