[CentOS] nfs stuck, don't know what processes to kill

Dave Burns tburns at hawaii.edu
Wed Feb 3 17:58:30 UTC 2016


On Tue, Feb 2, 2016 at 9:23 AM, <m.roth at 5-cent.us> wrote:

> Dave Burns wrote:
> > My NFS server is up and other clients can access x. One particular client
> > can't. I tried to unmount the NFS share:
> >
> > [root at nfsclient ~]#  umount -f /disk/x
> > umount2: Device or resource busy
> > umount.nfs: /disk/x: device is busy
> > umount2: Device or resource busy
> > umount.nfs: /disk/x: device is busy
> >
> > If I use df or lsof to try to figure out what process to kill, they hang.
> > I
> > am reluctant to just reboot, as many other users are getting stuff done.
> > dmesg doesn't show anything useful.
> >
> > How to get unstuck?
>
> *IF* I understand what you're saying, on that one client, you're trying to
> umount the nfs share. Is that the case?
>
> IF that is the case... is autofs running? If so, service autofs stop, and
> you should be able to umount it.
>
>        mark
>
> # service autofs stop results in fail. Maybe need #rm /var/run/autofs.pid?
Dave



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