Nfs Stuck, Don’t Know What Processes To Kill

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My NFS server is up and other clients can access x. One particular client can’t. I tried to unmount the NFS share:

[root@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?

thanks, Dave

6 thoughts on - Nfs Stuck, Don’t Know What Processes To Kill

  • Dave Burns wrote:

    *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

  • Thanks. How did I miss that -l switch? Unfortunately, I went into panic mode and just rebooted, but I’ll know next time. Dave

  • Dave Burns wrote:

    Ok, ps -ef | grep auto, and see if it’s running; or are you saying it
    *said* shutting it down failed? Oh, and is this CentOS 6 or 6 (service, or systemctl)?

    If it’s already shut off, and lsof doesn’t help, does doing a df help?
    Perhaps it might show someone’s workspace, or home directory mounted, so you know who to kill?

    mark

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