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ClearCase start script prevents MVFS from being unloaded from kernel on Linux

Troubleshooting


Problem

The IBM Rational ClearCase start script prevents MVFS from being unloaded from Linux kernel when the script is run multiple times.

Symptom

Under certain conditions, the ClearCase startup script may prevent MVFS from being removed from the kernel when stopping ClearCase, if the ClearCase startup script was run more than once on a Linux host while ClearCase was running.

The following error is reported:

ERROR: Module mvfs is in use
Trouble unloading the mvfs module(8:1)


Example of how to reproduce the issue:
  1. Run the ClearCase start script:

    /usr/atria/etc/clearcase start
    [root]# /usr/atria/etc/clearcase start
    ClearCase daemons: albd_server
    Mounting public VOBs...

  2. Issue the startup script again:

    [root]# /usr/atria/etc/clearcase start
    ClearCase daemons: albd_server
    mount_mvfs: File exists
    Trouble mounting the viewroot "/view"(16:29)
    Mounting public VOBs...

  3. Stop ClearCase:

    [root]# /usr/atria/etc/clearcase stop
    Unmounting VOBs...
    ERROR: Module mvfs is in use
    Trouble unloading the mvfs module(8:1)

  4. A reboot of the server will clear the issue.

Cause

This issue was identified as a product defect and logged under APAR PK87459.

Resolving The Problem

The defect has been resolved in the following releases:


If this problem continues to occur in later versions, please open a support ticket to investigate the issue.

WORKAROUND:

Do not use the /usr/atria/etc/clearcase start command more than once.

[{"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Component":"MVFS","Platform":[{"code":"PF016","label":"Linux"}],"Version":"7.0;7.0.0.1;7.0.0.2;7.0.0.3;7.0.0.4;7.0.0.5;7.0.1;7.0.1.1;7.0.1.2;7.0.1.3;7.0.1.4;7.1;7.1.0.1","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
16 June 2018

UID

swg21389091

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