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PI39558: MULTIPLE PROCESSES RUNNING UNDER CLEARCASE ON LINUX MAY HANG BECAUSE A PROCESS IS WAITING FOR A RENAME LOCK IN NFS.

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APAR status

  • Closed as program error.

Error description

  • Due to a defect in the MVFS, a process running IBM Rational
    ClearCase may not receive proper notification when a NFS lock,
    it is waiting for is released.  This may cause multiple
    ClearCase processes to hang as they try to access locks held by
    the first process.
    
    WORKAROUND:
    None.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users in ClearCase on RHEL 6.x systems                       *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Multiple processes running under ClearCase on Linux may hang *
    * because a process is waiting for a rename lock in NFS.       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • A locking protocol was modified in the ClearCase MVFS
    filesystem, to eliminate a possible situation in which waiters
    for a lock in NFS were not notified when it had been released.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI39558

  • Reported component name

    CLEARCASE WIN

  • Reported component ID

    5724G2900

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-04-21

  • Closed date

    2015-06-25

  • Last modified date

    2015-06-25

  • 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

    CLEARCASE WIN

  • Fixed component ID

    5724G2900

Applicable component levels

  • R800 PSY

       UP

  • R801 PSY

       UP

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Document Information

Modified date:
25 June 2015