From: Reuti <reuti@staff.uni-marburg.de>
Subject: NFS client got stale NFS handle after server reboot
Date: Tue, 20 Sep 2005 17:17:11 +0200
Message-ID: <433027F7.1030702@staff.uni-marburg.de>
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To: nfs@lists.sourceforge.net
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Hi all,

I set up a NFS server using kernel NFS in kernel 2.6.11.4-21.9 from
SuSE. I defined three directories to be exported using netgroups and all
is working fine, as they can be mounted as intended by all the nodes in
the cluster.

Up to now I was used to have the NFS feature, that a "hard" mount on the
nodes will survive a reboot of the NFS server. This is now no longer the
case. If I reboot the server, all the nodes get a stale NFS handle. I
can achieve the same effect by simple stopping and starting the nfsd -
same result.

As we use a RAID card for the disks in the server, I got the idea of
changed major-minor numbers and also tried to give in the "exports"
file a chosen "fsid=" for each of the three exports. (Although
starting/stopping the nfsd won't change the major-minor numbers I
think.) No change.

Now the funny part: login to a node. Choose any of the three imported
directories. Make an "umount" and "mount" on this dir - and also the
other two dirs reappear and are accessible again.

Does anyone has an explanation and/or solution for this setup, to get
the surviving feature back?

CU - Reuti

(BTW: all partitions are ext2 on Linux x86 machines, mounted with NFSv3)


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