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PM07060: APPLICATION SERVER STACK OVERFLOW CAUSED BY INFINITE CALL OF COM/IBM/WS/CACHE/CACHE.GETFREELRUENTRY

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APAR status

  • Closed as program error.

Error description

  • WebSphere Application Server ran into infinite recursive calls
of com/ibm/ws/cache/Cache.getFreeLruEntry. The infinte recursive
call caused Java stack overflow and ABEND0C4.

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V7.0 using dynacache for object      *
*                  caching.                                    *
****************************************************************
* PROBLEM DESCRIPTION: A stack overflow exception occurs       *
*                      when the object cache is full and       *
*                      objects are being evicted.              *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Cache entries are removed from the object cache using a least
recently used (LRU) algorithm when the object cache has reached
the maximum cache size.  If removing an object from the cache
fails an infinite recursive loop can occur trying to remove
the object.

    



Problem conclusion


    

  • The LRU algorthim has been modified to recognize that a remove
has failed and the next LRU object is then removed.

APAR PM07060 is currently targeted for inclusion in
Service Level (Fix Pack) 7.0.0.11 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
    PM07060
    • 

  • 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
    2010-02-08
    • 

  • Closed date
    2010-03-22
    • 

  • Last modified date
    2010-07-02
    • 





    

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

    
PM06078
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    WEBSPHERE FOR Z
    • 

  • Fixed component ID
    5655I3500
    • 



Applicable component levels


    

  • R700  PSY  UK57722
       UP10/06/17  P  F006
    • 



Fix is available


    

  • Select the PTF appropriate for your component level.
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Document Information


            

            


                        

            Modified date:
            

            10 February 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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