IBM Support

IT33865: HIGH CPU USAGE WHEN DB2_ALTERNATE_GROUP_LOOKUP REGISTRY VARIABLEAND OS GROUP NAMES DOES NOT MATCH DB2 NAMING RULES

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APAR status

  • Closed as program error.

Error description

  • Group lookup may encounter an infinite loop when
DB2_ALTERNATE_GROUP_LOOKUP registry variable is set to
GETUSERATTR and the OS returns group names that do not match Db2
naming rules.

May result in authentication or statements appearing to hang
with high CPU usage.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
* ALL                                                          *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Db2 11.1 Mod 4 Fix Pack 6                         *
****************************************************************

    



Problem conclusion


    

  • First fixed on Db2 11.1 Mod 4 Fix Pack 6

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT33865
    • 

  • Reported component name
    DB2 FOR LUW
    • 

  • Reported component ID
    DB2FORLUW
    • 

  • Reported release
    B10
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2020-08-11
    • 

  • Closed date
    2021-03-26
    • 

  • Last modified date
    2021-03-26
    • 





    

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

    • 

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

    
IT34107        
    

    • 



Fix information


    

  • Fixed component name
    DB2 FOR LUW
    • 

  • Fixed component ID
    DB2FORLUW
    • 



Applicable component levels


    








      
          
                    

          

          [{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1"}]
          

                    

        
        

        

      


      


        

            

            
Document Information


            

            


                        

            Modified date:
            

            27 March 2021
            

            
            
          

        


        

        


      


    


  





    

  



  
    
      

      
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