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PM06816: RACE CONDITION IN KEYMANAGERIMPL

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APAR status

  • Closed as program error.

Error description

  • Although the key manager (KeyManagerImpl) is already
    synchronized, a race condition can occur if the key manager is
    serialized, for example, during session fail-over. The race
    condition can result in hanging threads or seemingly corrupt
    data structures as the key manager uses a access-ordered
    LinkedHashMap which results in structural changes even if the
    map is only accessed with get() methods.
    
    This APAR supersedes PM02025.
    

Local fix

  • None available.
    

Problem summary

  • Although the key manager (KeyManagerImpl) is already
    synchronized, a race condition can occur if the key manager is
    serialized, for example, during session fail-over. The race
    condition can result in hanging threads or seemingly corrupt
    data structures as the key manager uses a access-ordered
    LinkedHashMap which results in structural changes even if the
    map is only accessed with get() methods.
    
    This APAR supersedes PM02025.
    

Problem conclusion

  • This APAR introduces specialized writeObject/readObject
    methods that properly deal with the synchronization during
    serialization.
    
    
    Manual Steps:
       None
    
    Failing Module(s):
       Engine: State handling
    
    Affected Users:
       All
    
    Version Information:
        Portal Version(s): 6.1.0.1
         Pre-Requisite(s): PM02025
          Co-Requisite(s): ---
    
        Portal Version(s): 6.1.0.2
         Pre-Requisite(s): PM02025
          Co-Requisite(s): ---
    
    Platform Specific:
       This fix applies to all platforms.
    
    A fix is available from Fix Central:
    
    http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde
    r?apar=PM06816&productid=WebSphere%20Portal&brandid=5
    
    You may need to type or paste the complete address into your Web
    browser.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM06816

  • Reported component name

    WEBSPHERE PORTA

  • Reported component ID

    5724E7600

  • Reported release

    61A

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-02-05

  • Closed date

    2010-02-17

  • Last modified date

    2010-05-19

  • 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 PORTA

  • Fixed component ID

    5724E7600

Applicable component levels

  • R61A PSY

       UP

  • R61B PSY

       UP

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Document Information

Modified date:
19 May 2010