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PM23611: HIGH CPU IN JAVA/UTIL/JAR/JARFILE.GETENTRY WHN IDLE

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APAR status

  • Closed as program error.

Error description

  • Customer has a very big cell. When the cell was idle, customer
saw very high in CPU usage. After taking the dumps we saw a lot
of CPU spent in java/util/jar/JarFile.getEntry. The problem is
javax/xml/parsers/DocumentBuilderFactory.newInstance being
called so frequently.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED: All users of IBM WebSphere Application       *
*                 Server V7.0                                  *
*                                                              *
****************************************************************
* PROBLEM DESCRIPTION: High CPU usage on an idle system.       *
*                                                              *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
A customer with a very large cell noticed high CPU usage when
the system was idle. Dumps showed that
javax/xml/parsers/DocumentBuilderFactory.newInstance in
SOAP-related code was being called frequently.

    



Problem conclusion


    

  • SOAP code was modified to cache and reuse DocumentBuilder
rather than frequently creating a new one.

APAR PM23611 is currently targeted for inclusion in Service
Level (Fix Pack) 7.0.0.13 of WebSphere Application Server V7.0.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PM23611
    • 

  • Reported component name
    WEBSPHERE FOR Z
    • 

  • Reported component ID
    5655I3500
    • 

  • Reported release
    700
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2010-09-30
    • 

  • Closed date
    2010-10-06
    • 

  • Last modified date
    2010-11-03
    • 





    

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

    
PM18827
    

    • 

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

    • 



Modules/Macros


    

  • BBGUBINF BBOUBINF

    



Fix information


    

  • Fixed component name
    WEBSPHERE FOR Z
    • 

  • Fixed component ID
    5655I3500
    • 



Applicable component levels


    

  • R700  PSY  UK61146
       UP10/10/21  P  F010
    • 



Fix is available


    

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              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            10 February 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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