IBM Support

IV49602: Memory exception and possible loss of function in WebSphere MQ application

Fixes are available

WebSphere MQ V7.5 Fix Pack 7.5.0.3
WebSphere MQ V7.0 Fix Pack 7.0.1.12
Fix Pack 7.1.0.5 for WebSphere MQ V7.1

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • A WebSphere MQ application or a SVRCONN channel thread in an
amqrmppa process might suffer a memory exception (example:
SIGSEGV).

FDC records might be written with probe XC130003 or XC130031.

The MQM Function Stack might contain:

zstAsyncConsumeThread
zstAsyncConsume
vpiConvertData
vwaConvert
vwb_rf_header_2
xcsFFST

Local fix

  • Set SHARECNV(0) on the SVRCONN channel definition.

Problem summary

  • ****************************************************************
USERS AFFECTED:
Users of the WebSphere MQ asynchronous consume function, where
consumer functions have been registered with the MQGMO_CONVERT
option, and in which MQRFH2 data blocks are in use by the
applications.

Platforms affected:
All Distributed (iSeries, all Unix and Windows)
****************************************************************
PROBLEM SUMMARY:
The queue manager was returning an incorrect data length to the
WebSphere MQ code running in the application process.  This
code then used this length to try to read more bytes than were
actually readable.  This then caused the memory exception to
occur.

Problem conclusion

  • The WebSphere MQ product code has been corrected to ensure the
length passed back by the queue manager to the application is
correct.

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

Version    Maintenance Level
v7.0       7.0.1.12
v7.1       7.1.0.5
v7.5       7.5.0.3

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


    

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APAR Information




    

  • APAR number
    IV49602
    • 

  • Reported component name
    WMQ AIX V7
    • 

  • Reported component ID
    5724H7221
    • 

  • Reported release
    701
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2013-09-19
    • 

  • Closed date
    2013-10-18
    • 

  • Last modified date
    2013-10-18
    • 





    

  • 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
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSDEZSF","label":"IBM WebSphere MQ Managed File Transfer for z\/OS"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0.1","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            31 March 2023
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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