IBM Support

PM99116: Object query with XIO transport and XDF COPY_TO_BYTES mode creates extra Lock objects which results in

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APAR status

  • Closed as program error.

Error description

  • The WebSphere eXtreme Scale object query component allocated
extra lock objects for entries returned from the query. The
result is that OutOfMemory errors and heap dumps can occur.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:  WebSphere eXtreme Scale users who are       *
*                  running                                     *
*                  object query with IBM eXtremeIO (XIO)       *
*                  transport and eXtreme data format (XDF)     *
*                  COPY_TO_BYTES mode.                         *
****************************************************************
* PROBLEM DESCRIPTION: Object query creates additional lock    *
*                      objects that are not destroyed when     *
*                      access to the data is no longer         *
*                      required.                               *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When an object query runs, two lock objects are
created for data that is accessed as part of the query. When
the query completes, the transaction unlocks and destroys
the locks. However,both of the locks might not be released. The
locks remaining in the system can contribute to causing
OutOfMemory conditions.

    



Problem conclusion


    

  • Both locks are destroyed, and only one lock is acquired when
necessary.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PM99116
    • 

  • Reported component name
    WS EXTREME SCAL
    • 

  • Reported component ID
    5724X6702
    • 

  • Reported release
    860
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2013-10-15
    • 

  • Closed date
    2013-10-16
    • 

  • Last modified date
    2013-10-16
    • 





    

  • 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
    WS EXTREME SCAL
    • 

  • Fixed component ID
    5724X6702
    • 



Applicable component levels


    

  • R860  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSTVLU","label":"WebSphere eXtreme Scale"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"860","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            16 October 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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