[libvirt-users] delete lvm problem: exited with non-zero status 5 and signal 0

[lingjiao.lc]

hi,
 I use the libvirt-python to manage my virtual machine. When I delete a
volume use vol.delete(0), sometimes it note me that has occur the error:

                libvirtError: internal error '/sbin/lvremove
                -f /dev/vg.vmms/lvm-v097222.sqa.cm4' exited with
                non-zero status 5 and signal 0:   Can't remove open
                logical volume "lvm-v097222.sqa.cm4".

 then I go to the host and run the command:
        " sudo lvchange -a n /dev/vg.vmms/lvm-v097222.sqa.cm4"
 and then the volume could delete use vol.delete(0).

But it's not often occur, just once in nearly 8.

I know the delete function virStorageBackendLogicalDeleteVol as this:
{
    {
        const char *cmdargv[] = {
            LVREMOVE, "-f",vol->target.path, NULL
        };

    virCheckFlags(0, -1);

    virFileWaitForDevices();

    if (virRun(cmdargv, NULL) < 0)
        return -1;

    return 0;
}

Could I change it like this: ?
        if (virRun(cmdargv, NULL) < 0)
        const char *changeCmdarg[] = {
         LVCHANGE, "-a", "n", vol->target.path, NULL
        };
        if(virRun(changeCmdarg, NULL) < 0)
            return -1;
        else
            if(virRun(cmdargv,NULL) < 0)
                return -1;



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