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PH35981: OVERLAPPINGFILELOCKEXCEPTION ON ZOS AFTER APPLYING PH26972 IFIX

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APAR status

  • Closed as program error.

Error description

  • A zOS customer reported that they are getting
    OverlappingFileLockException after applying the fix for APAR
    PH26972. These exceptions also resulted in JAXBContext cache
    files getting corrupted after a while.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  IBM WebSphere Application Server users of   *
    *                  Web services applications on zOS            *
    ****************************************************************
    * PROBLEM DESCRIPTION: java.nio.channels.OverlappingFileLockEx *
    *                      ception occurs on zOS                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    After applying fix for APAR PH26972, the following exception
    may occur on zOS:
    Exception occurred obtaining zOS lock:
    java.nio.channels.OverlappingFileLockException
    

Problem conclusion

  • This problem occurred on some zOS environments after applying
    fix for APAR PH26972 because of a file synchronizing problem
    when accessing the JAXB context cache file from different
    servants on zOS. The problem was fixed by updating the code to
    properly synhronize access to JAXB context cache files on zOS.
    
    The fix for this APAR is targeted for inclusion in fix packs
    8.5.5.20 and 9.0.5.8.For more information, see 'Recommended
    Updates for WebSphere Application Server':
    https://www.ibm.com/support/pages/node/715553
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH35981

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-04-02

  • Closed date

    2021-05-20

  • Last modified date

    2021-05-20

  • 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

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850"}]

Document Information

Modified date:
21 May 2021