IBM Support

PI14640: ENABLING THE MVFS CACHE MANAGER MAY CAUSE BINARY FILES TO BECOME CORRUPTED

Fixes are available

Rational ClearCase Fix Pack 11 (8.0.0.11) for 8.0
Rational ClearCase Fix Pack 4 (8.0.1.4) for 8.0.1
Rational ClearCase Fix Pack 5 (8.0.1.5) for 8.0.1
Rational ClearCase Fix Pack 12 (8.0.0.12) for 8.0
Rational ClearCase Fix Pack 6 (8.0.1.6) for 8.0.1
Rational ClearCase Fix Pack 13 (8.0.0.13) for 8.0
Rational ClearCase Fix Pack 14 (8.0.0.14) for 8.0
Rational ClearCase Fix Pack 7 (8.0.1.7) for 8.0.1
Rational ClearCase Fix Pack 15 (8.0.0.15) for 8.0
Rational ClearCase Fix Pack 8 (8.0.1.8) for 8.0.1
Rational ClearCase Fix Pack 16 (8.0.0.16) for 8.0
Rational ClearCase Fix Pack 9 (8.0.1.9) for 8.0.1
Rational ClearCase Fix Pack 17 (8.0.0.17) for 8.0
Rational ClearCase Fix Pack 10 (8.0.1.10) for 8.0.1
Rational ClearCase Fix Pack 18 (8.0.0.18) for 8.0
Rational ClearCase Fix Pack 11 (8.0.1.11) for 8.0.1
Rational ClearCase Fix Pack 19 (8.0.0.19) for 8.0
Rational ClearCase Fix Pack 12 (8.0.1.12) for 8.0.1
Rational ClearCase Fix Pack 20 (8.0.0.20) for 8.0
Rational ClearCase Fix Pack 13 (8.0.1.13) for 8.0.1
Rational ClearCase Fix Pack 21 (8.0.0.21) for 8.0
Rational ClearCase Fix Pack 14 (8.0.1.14) for 8.0.1
Rational ClearCase Fix Pack 15 (8.0.1.15) for 8.0.1
Rational ClearCase Fix Pack 16 (8.0.1.16) for 8.0.1
Rational ClearCase Fix Pack 17 (8.0.1.17) for 8.0.1
Rational ClearCase Fix Pack 18 (8.0.1.18) for 8.0.1
Rational ClearCase Fix Pack 19 (8.0.1.19) for 8.0.1
Rational ClearCase Fix Pack 20 (8.0.1.20) for 8.0.1
Rational ClearCase Fix Pack 21 (8.0.1.21) for 8.0.1
Rational ClearCase Fix Pack 22 (8.0.1.22) for 8.0.1
Rational ClearCase Fix Pack 23 (8.0.1.23) for 8.0.1
Rational ClearCase Fix Pack 24 (8.0.1.24) for 8.0.1
Rational ClearCase Fix Pack 25 (8.0.1.25) for 8.0.1

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • When working in an IBM Rational ClearCase dynamic view and you
    have enabled the MVFS Cache Manager, you may find that your
    binary files become corrupted while they are being written.
    
    WORKAROUND:
    
    Change the settings in the following Microsoft Windows Registry
    key from 1 to 0.  For example:
    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Mvfs\Param
    eters]
    'UseCacheManager'=dword:00000000
    
    Reboot the machine for this to take effect.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of Rational ClearCase MVFS.                            *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Users of Rational ClearCase MVFS may see corrupted files     *
    * containing zeros if the use of the cache manager is turned   *
    * on. The issue is caused because the view server may send     *
    * stale information about the file size and makes the file     *
    * smaller than it actually is in the cache. Later MVFS updates *
    * the file size to the correct value, but the file data has    *
    * already been lost.                                           *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • A fix is available in ClearCase versions 8.0.0.11 and 8.0.1.4
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI14640

  • Reported component name

    CLEARCASE WIN

  • Reported component ID

    5724G2900

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2014-03-27

  • Closed date

    2014-06-26

  • Last modified date

    2015-10-01

  • 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

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU029","label":"Software"},"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.1"}]

Document Information

Modified date:
16 June 2021