IT07278: WEBSPHERE MQ ON WINDOWS: ACCESS VIOLATION REPROTED IN COM+ APPLICATION DURING DTC::ABORTREQUEST CALL.

APAR status

• Closed as program error.

Error description

• When a COM+ application aborts the transaction, an access
  violation may be reported and the dllhost.exe process crashes.
  This generates a dump. Here is an example of stack:
  
  amqmtmgr.dll!CDtc::AbortRequest()
  msdtcprx.dll!CIEnlistmentAsynch::AbortRequestWrapper()
  msdtcprx.dll!CIEnlistmentAsynch::SetState()
  msdtcprx.dll!CIEnlistmentAsynch::SMD_ESTATE_ENLISTED()
  msdtcprx.dll!CIEnlistmentAsynch::StateMachineDriver()
  msdtcprx.dll!CIEnlistmentAsynch::Receive()
  msdtcprx.dll!CIConnSink::ReceivedUserMessage()
  msdtcprx.dll!CIConnSink::IncomingEvent()
  msdtcprx.dll!CConnectionObject::DeliverIncomingEvents()
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  MQ XA applications that uses MSDTC as the transaction manager.
  
  
  Platforms affected:
  Windows
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A memory access violation error is reported while aborting a
  transaction following a MQRC_GLOBAL_UOW_CONFLICT error.
  
  The error MQRC_GLOBAL_UOW_CONFLICT is reported if the
  application starts a new transaction on a connection handle that
  is already part of another active transaction.
  

Problem conclusion

• The memory access violation error is reported while accessing an
  invalid memory address. A check is introduced to validate the
  address before accessing it.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.0       7.0.1.14
  v7.1       7.1.0.7
  v7.5       7.5.0.6
  v8.0       8.0.0.3
  
  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

  WMQ WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R701 PSY

     UP