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IT33575: ProbeID XC130031 from kpiCancelWaiter when ending the queue manager

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APAR status

  • Closed as program error.

Error description

  • MQ 9.0 LTS on Windows generates the following FDC when ending
the queue manager:

| Probe Id          :- XC130031
                                              |
| Application Name  :- MQM
                                                   |
| Component         :- xehExceptionHandler
                                   |
...
| Comment1          :- Access Violation at address
000000915F3B1A98 when      |
|   reading

 |
|
              |
+---------------------------------------------------------------
--------------+
---> Stack dump for the faulting thread (0x1554) <---
Stack Backtrace:
# ChildEBP         RetAddr           Param#1          Param#2
         Param#3          Param#4           Fn-Loc'n         :
Module!Function+Offset [File Name # Line+Offset @ Address]
00 000000915792F1D0 000007FA7790617F (000000915792FC60
000007FA00000000 000000915792F270 000000915792F210)
000007FA71B61338 : amqknl2!kpiCancelWaiter+0x378<NLN:487>
01 000000915792F2E0 000007FA77905A12 (0000000000000000
0000000000000000 0000000000000000 000000915792F400)
000007FA7790617F : amqzai2!zmuStopWaitingTask+0x29f<NLN:487>
02 000000915792F3C0 000007FA77904730 (0000009157A43110
00000091590D2640 000000915792FC60 00000091590D19F4)
000007FA77905A12 : amqzai2!zmuStopThisTask+0xc2<NLN:487>
03 000000915792F4C0 000007FA77909287 (00000091590D19C0
00000091590D2640 0000000000001640 00000091590D1A44)
000007FA77904730 : amqzai2!zmuShutdownPhase+0x3b0<NLN:487>
04 000000915792FCF0 000007F692FD1137 (0000000000000001
0000009157A39700 0000009100000001 00000000FFFFFFFF)
000007FA77909287 : amqzai2!zmuUtilityManager+0x1b67<NLN:487>
05 000000915792FD80 000007F692FD15D3 (0000000000000000
0000000000000000 0000000000000000 0000000000000000)
000007F692FD1137 : amqzmur0!main+0x137<NLN:487>
06 000000915792FDB0 000007FA96E11652 (0000000000000000
0000000000000000 0000000000000000 0000000000000000)
000007F692FD15D3 : amqzmur0!__tmainCRTStartup+0x10f<NLN:487>
07 000000915792FDE0 000007FA9874BED1 (0000000000000000
0000000000000000 0000000000000000 0000000000000000)
000007FA96E11652 : KERNEL32!BaseThreadInitThunk+0x1a<NLN:487>
08 000000915792FE30 0000000000000000 (0000000000000000
0000000000000000 0000000000000000 0000000000000000)
000007FA9874BED1 : ntdll!RtlUserThreadStart+0x21<NLN:487>

MQM Function Stack
amqzmur0
zmuUtilityManager
zmuShutdownPhase
zmuStopThisTask
zmuStopWaitingTask
kpiCancelWaiter
xcsFFST


If the issue is encountered on platforms other than Windows, the
FDC will report a SIGSEGV signal, instead of an access
violation, for the same MQM function stack.

Local fix

  • 



Problem summary


    

  • ****************************************************************
USERS AFFECTED:
Users of endmqm may be affected by this problem.


Platforms affected:
MultiPlatform

****************************************************************
PROBLEM DESCRIPTION:
When ending the queue manager some state is accessed which has
already been disposed of and this causes an access violation in
the amqzmur0 process.

    



Problem conclusion


    

  • Defensive code has been added to avoid accessing invalid state.

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

Version    Maintenance Level
v9.0 LTS   9.0.0.12
v9.1 LTS   9.1.0.8
v9.x CD    9.1.4

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
    IT33575
    • 

  • Reported component name
    IBM MQ BASE M/P
    • 

  • Reported component ID
    5724H7261
    • 

  • Reported release
    900
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2020-07-16
    • 

  • Closed date
    2021-01-22
    • 

  • Last modified date
    2021-03-10
    • 





    

  • 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
    IBM MQ BASE M/P
    • 

  • Fixed component ID
    5724H7261
    • 



Applicable component levels


    








      
              
                            

              

              [{"Line of Business":{"code":"LOB45","label":"Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0"}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            11 March 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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