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PI45420: FUTIMENS() SYSCALL MAY SHOW THE INCORRECT TIME WHEN A FILE IS TOUCHED IN A DYNAMIC VIEW

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APAR status

  • Closed as program error.

Error description

  • When you are touching a file in an IBM Rational ClearCase
    dynamic view in version 8.0.1.x or later on SUSE Linux, you may
    find that the time appears to be backwards for the second time
    you touched the file:
    
    root@machine:/vbs/vob> /tmp/a.out -s 500000;ls --full-time
    touch*
    -r-----r-- 1 root root 0 2015-06-18 18:43:14.249889000 -0400
    touchFirst
    -r-----r-- 1 root root 0 2015-06-18 18:43:14.000000000 -0400
    touchSecond
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of IBM Rational ClearCase on Linux systems with view   *
    * storage on ext2 or ext3 filesystems, or accessing those      *
    * versions through NFS.                                        *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * When the filesystem used for ClearCase view storage does not *
    * support sub-second timestamp granularity, the timestamps     *
    * reported for ClearCase view-private files may seem           *
    * inconsistent.                                                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • The way the IBM Rational ClearCase MVFS filesystem validates and
    sets time-stamps was improved. Additionally, the resolution of
    view private files time-stamps will never be better than the
    resolution of the view storage file-system.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI45420

  • Reported component name

    CLEARCASE WIN

  • Reported component ID

    5724G2900

  • Reported release

    801

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-07-21

  • Closed date

    2015-12-14

  • Last modified date

    2015-12-14

  • 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":"801"}]

Document Information

Modified date:
17 June 2021