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PM77414: Accessing a dynamic view via a Windows symlink cause a system crash

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • When accessing or executing a program in a dynamic view via a
    Windows
    symbolic link, Windows crash with a BSOD in the MVFS. This is
    when using
    Microsoft NTFS symbolic link NOT ClearCase symbolic link.
    
    Reproduction step
    CC 8.0.0.4/7.1.2.x and Windows 7 64 bits
    As administrator:
    - Open an admin cmd.exe
    - Create or start a view and map it to a drive
        net use U: \\view\viewtag
    - Create the symbolic link from Windows filesystem to the view
    folder
        cd c:\temp
        mklink /D linked_folder U:\vobtag\folder
    - Cd into it form the C drive
        cd linked_folder
    - Attempt to execute the program or run a cleartool command
      (program is under source control in checkin)
        BSOD
    
    Not all programs or commands cause the crash. Some executable or
    ClearCase
    commands works fine, some not. It depends what the programs is
    doing on the
    filesystem. In the reproduction a simple 'cleartool ls' caused a
    BSDO.
    
    WORKAROUND:
    Microsoft symbolic link into the MVFS are NOT supported and
    should not
    be used.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of IBM Rational ClearCase dynamic views on Microsoft   *
    * Windows                                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * When accessing or executing an executable in a dynamic view  *
    * via an NTFS symbolic link, the system may receive an         *
    * unexpected STOP error message (BSOD).                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • Microsoft symbolic links are not currently supported by
    ClearCase dynamic views, however the problem which caused a
    system crash when accessing such a link is fixed in ClearCase
    versions 7.1.2.19, 8.0.0.16, and 8.0.1.9.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM77414

  • Reported component name

    CLEARCASE WIN

  • Reported component ID

    5724G2900

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2012-11-20

  • Closed date

    2017-10-13

  • Last modified date

    2017-10-13

  • 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

  • R712 PSY

       UP

  • R800 PSY

       UP

  • R801 PSY

       UP

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Document Information

Modified date:
13 October 2017