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PH07008: HAVE OPENJPA UPDATE THE DESCRIMINATOR CLASS CACHE AS CLASSES BECOME LOADED AND REGISTERED IN THE METADATAREPOSITORY

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APAR status

  • Closed as program error.

Error description

  • OpenJPA currently only loads their descriminator class cache
    once. If any classes are not registered at that time, they will
    not be available for future cache checks, leading to inaccurate
    ClassNotFoundExceptions. The fix for this will be to update
    OpenJPA to allow the cache to be updated as classes become
    loaded and registered with the MetaDataRepository.
    
    
    The problem can be observed in applications that make use of JPA
    discriminators. For classes not registered in the cache,
    exceptions are seen as follows:
    --
    org.apache.openjpa.persistence.ArgumentException:
    Could not map discriminator value "SUBCLASS_OF_A" to any
    known subclasses of the requested
    class "A"
    --
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V8.5 - Java Persistence API - JPA    *
    *                  2.0 & OpenJPA                               *
    ****************************************************************
    * PROBLEM DESCRIPTION: The discriminator class cache throws    *
    *                      CNFEs if classes are not registered     *
    *                      in time                                 *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    OpenJPA currently only loads their descriminator class cache
    once. If any classes are not registered at that time, they will
    not be available for future cache checks, leading to inaccurate
    ClassNotFoundExceptions. The is a very short race condition
    that results in CNFE from OpenJPA's discriminator class cache.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PH07008

  • Reported component name

    WEBSPHERE FOR Z

  • Reported component ID

    5655I3500

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-01-08

  • Closed date

    2019-07-08

  • Last modified date

    2019-07-08

  • 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

    WEBSPHERE FOR Z

  • Fixed component ID

    5655I3500

Applicable component levels

  • R850 PSY

       UP

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Document Information

Modified date:
17 October 2021