IBM Support

PK23535: PERFORMANCE ENHANCEMENTS WHEN SENDING OBJECT ACROSS DATA REPLICATION SERVICE

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • When sending com.ibm.ws.cache.IdObject across DRS a
    performance degradation occurs.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere Applicaiton Server    *
    *                 version 6.0.2 using dynamic cache function   *
    *                 with replication enabled.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: Deserialization of                      *
    *                      com.ibm.ws.cache.IdObject is very       *
    *                      slow and hogs all the CPU.              *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The deserialization of com.ibm.ws.cache.IdObject objects by
    the data replication service (DRS) is first done by the
    current thread classloader and if that fails it is done using
    the server classloader. If the IdObject has reference to
    custom java objects then the deserialization attempt using
    the current thread classloader would always fail. This results
    in IdObject.deserialize() taking all the CPU. To fix this we
    will first use the server classloader to deserialize IdObjects
    if the following custom property is set:
    com.ibm.ws.cache.CacheConfig.useServerClassLoader=true.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PK23535

  • Reported component name

    WEBSPHERE BASE

  • Reported component ID

    5630A3600

  • Reported release

    60A

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2006-04-18

  • Closed date

    2006-05-10

  • Last modified date

    2006-05-10

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

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

Modules/Macros

  • DYNACACH
    

Fix information

  • Fixed component name

    WEBSPH APP SERV

  • Fixed component ID

    5724J0800

Applicable component levels

  • R60A PSY

       UP

  • R60H PSY

       UP

  • R60I PSY

       UP

  • R60P PSY

       UP

  • R60S PSY

       UP

  • R60W PSY

       UP

  • R60Z PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
19 October 2021