Re: Need Help to Fix Stale NFS File Handle

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Author: Alex Dean
Date:  
To: Main PLUG discussion list
Subject: Re: Need Help to Fix Stale NFS File Handle

On Feb 25, 2011, at 4:16 PM, Mark Phillips wrote:

>
>
> On Fri, Feb 25, 2011 at 2:30 PM, Alex Dean <> wrote:
>
> On Feb 25, 2011, at 3:13 PM, Mark Phillips wrote:
> > # mount | grep nfs
> > return anything?
> > hammerhead:/home/mark# mount | grep nfs
> > rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
> > hammerhead:/home/mark#
> >
> > I have no idea who rpc_pipefs on /var/lib.... is and why it is there! Any ideas before I blow it away?
>
> That's NFS-server related. Used by the id mapper, I think. On RedHat at least, I think that's started/stopped by /etc/init.d/nfslock. (Though my memory is a little sketchy on that point.) The pipefs could possibly be mounted even if nothing's using it, also. Got any NFS-related services running?
>
> Afaik, an NFS server shouldn't get stale file handles. That's a client's problem.
>
> RedHat/Fedora:
> $ rpm -qa | grep nfs
> Debian/Ubuntu:
> $ dpkg --list | grep nfs
> Both:
> $ ls /etc/init.d | grep nfs
>
> hammerhead:/home/mark# dpkg --list | grep nfs
> rc  libnfsidmap1                         0.8-1                                An nfs idmapping library
> ii  libnfsidmap2                         0.20-1                               An nfs idmapping library
> ii  nfs-common                           1:1.1.2-6lenny2                      NFS support files common to client and serve

>
> hammerhead:/home/mark# ls /etc/init.d | grep nfs
> mountkernfs.sh
> mountnfs-bootclean.sh
> mountnfs.sh
> nfs-common
> umountnfs.sh
> hammerhead:/home/mark#
>
> Wow...I had no idea nfs was running. I have no idea how it is being used or by what process. Do I stop it with /etc/init.d/umnountnfs?
>
> Mark


unmountnfs.sh is part of initscripts. I don't think you're expected to call it directly, so I'd be inclined to say leave it alone. I think you can try removing all those packages if you really don't need them. To stop nfs-common, you'd use '/etc/init.d/nfs-common stop'.

alex@artichoke:~$ cat /etc/issue
Ubuntu 9.10 \n \l
alex@artichoke:~$ dpkg -S /etc/init.d/umountnfs.sh
initscripts: /etc/init.d/umountnfs.sh

You can use "apt-cache showpkg nfs-common" to figure out if you've got any packages which depend on nfs-common. (Same for libnfsidmap1 and 2.) Look in the 'Reverse Depends' section. Or just "apt-get remove ..." and see what warnings you get.

I imagine the uninstallation scripts should umount the pipefs filesystem, but that may not be true. Either way, I don't think that's the cause of your 'stale file handles' issue, but I could certainly be wrong on that point.

alex
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