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IC96842: WEBSPHERE MQ APPLICATION GENERATES AN FDC WITH PROBE ID XC130031 IN XEHEXCEPTIONHANDLER WITH ACCESS VIOLATION AT ADDRESS 00000010

A fix is available

WebSphere MQ V7.0 Fix Pack 7.0.1.12

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APAR status

  • Closed as program error.

Error description

  • A multithreaded WebSphere MQ application may fail when one
thread disconnects an MQ connection while another thread is
using it.  When this occurs, the application will generate an
FDC with values similar to this:
.
  Probe Id          :- XC130031
  Component         :- xehExceptionHandler
  Major Errorcode   :- xecF_E_UNEXPECTED_SYSTEM_RC
  Probe Description :- AMQ6109: An internal WebSphere MQ error
                       has occurred.
  Comment1          :- Access Violation at address 00000010
                       when reading
.
.
In addition, the FDC may show a Stack Backtrace similar to this:
.
  xcsReleaseThreadMutexSem+0x67
  reqGetConn+0x692
  rzstMQCLOSE+0xd9
  tmzstMQCLOSE+0x26f
  MQCLOSE+0x78

Local fix

  • 



Problem summary


    

  • ****************************************************************
USERS AFFECTED:
Users running multi threaded MQ applications

Platforms affected:
All Distributed (iSeries, all Unix and Windows)
****************************************************************
PROBLEM SUMMARY:
A memory access violation error occurs with the following
function stack recorded in the FDC

MQCLOSE
reqGetConn
xcsReleaseThreadMutexSem
xcsFFST

This error occurs when a thread tries to release the resources
associated to a connection that is in an invalid state.

    



Problem conclusion


    

  • The code was modified to correct the memory access violation
error.

---------------------------------------------------------------
The fix is targeted for delivery in the following PTFs:

Version    Maintenance Level
v7.0       7.0.1.12

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 number
    IC96842
    • 

  • Reported component name
    WMQ WINDOWS V7
    • 

  • Reported component ID
    5724H7220
    • 

  • Reported release
    701
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2013-10-11
    • 

  • Closed date
    2013-12-20
    • 

  • Last modified date
    2013-12-20
    • 





    

  • 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
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            31 March 2023
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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