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PH36289: CLEAN POTENTIAL STALE POINTERS TO CERTAIN FREED/REUSED ECSA ROUTINES

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APAR status

  • Closed as program error.

Error description

  • Management of QM's internal storage manager routines
Update code within QM/STAP to manage the ECSA based module
pointers so when QM or STAP is recycled that stale pointers to
the freed/reused
ECSA routines do not exist and cause wild branches into unknown
code.

Local fix

  • Restart CQM/ADH Master Address Space

Problem summary

  • ****************************************************************
* USERS AFFECTED: Users of IBM Db2 Query Monitor for z/OS,     *
*                 Users of IBM Security Guardium S-TAP for     *
*                 Db2 on z/OS                                  *
****************************************************************
* PROBLEM DESCRIPTION: Clean potential stale pointers to       *
*                      certain freed/reused ECSA routines.     *
****************************************************************
* RECOMMENDATION: APPLY the PTF.                               *
****************************************************************
When Query Monitor or Guardium S-TAP is recycled there are
stale pointers to the freed/reused ECSA routines which did not
exist and caused wild branches into unknown code.

Problem conclusion

  • Logic was changed to update Query Monitor internal storage
manager routines to handle the ECSA based module pointers
correctly.

Search Keywords:
ECSA ROUTINES ABEND 0C4 STARTUP MISMATCH

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PH36289
    • 

  • Reported component name
    DB2 QUERY MONIT
    • 

  • Reported component ID
    5655E6701
    • 

  • Reported release
    330
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2021-04-14
    • 

  • Closed date
    2021-07-22
    • 

  • Last modified date
    2021-08-09
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    
010PC2Ÿ
    

    • 



Modules/Macros


    

  • CQM#IDB2 CQM#INIX CQM#PARM CQM#PCIX CQM#QAPI CQM#QAPX CQM#QSQL
CQM$BUFP CQM$DELY CQM$LOCK CQM$QRPT CQM$SM01 CQM$SM02 CQM$SQLT
CQM$TEXT CQMBLOB  CQMCAE   CQMCAEPT CQMCAPI  CQMCFPAX CQMCPXPT
CQMJAR   CQMUPXPT

    



Fix information


    

  • Fixed component name
    DB2 QUERY MONIT
    • 

  • Fixed component ID
    5655E6701
    • 



Applicable component levels


    

  • R330  PSY  UI76411
       UP21/08/09  P  F107
    • 



Fix is available


    

  • Select the PTF appropriate for your component level.
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              [{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSZJXP","label":"DB2 Tools for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"3.3.0"}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            10 August 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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