Re: clients cannot reconnect to mounted nfs shares after server restart

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On Mon, Jan 31, 2011 at 07:24:30PM -0800, camden lindsay wrote:
> Having an issue i believe is an NFS bug, but would like someone to
> verify as well as... point me the correct direction to submit a bug as
> needed if it indeed is.
> Situation:
> NFS server running
> Client connected with mounted share
> NFS server is shut down -- (halt or /etc/init.d/nfs stop)
> NFS server is turned on (booted or /etc/init.d/nfs start)
> 
> Outcome:
> NFS client that was connected does not reconnect to that share automatically
> NFS client that was connected cannot reconnect via umount then mount again
> No other nfs client can connect to that share, before or after origial

How long have you waited?

> NFS clients attempts to connect/reconnect
> NFS clients CAN connect to a different share.
> Details/logs:
> Server shows that client is authenticating:
> Feb Â1 03:01:47 BigBox mountd[6557]: authenticated mount request from
> 192.168.11.49:674 for /mnt/store/public (/mnt/store/public)
> Feb Â1 03:01:48 BigBox mountd[6557]: authenticated mount request from
> 192.168.11.49:763 for /mnt/store/public (/mnt/store/public)
> Feb Â1 03:01:50 BigBox mountd[6557]: authenticated mount request from
> 192.168.11.49:932 for /mnt/store/public (/mnt/store/public)
> Feb Â1 03:01:54 BigBox mountd[6557]: authenticated mount request from
> 192.168.11.49:942 for /mnt/store/public (/mnt/store/public)

A network trace (tcpdump -s0 -wtmp.pcap, then reproduce the problem,
then ^C tcpdump, then send us tmp.pcap) might help.

> 
> Client shows retransmission:
> dylan@shobuntu:~$ sudo mount -v -t nfs bigbox:/mnt/store/public Public/
> mount.nfs: timeout set for Mon Jan 31 19:09:32 2011
> mount.nfs: text-based options: 'addr=192.168.11.10'
> mount.nfs: text-based options: 'addr=192.168.11.10'
> mount.nfs: text-based options: 'addr=192.168.11.10'
> mount.nfs: text-based options: 'addr=192.168.11.10'
> mount.nfs: text-based options: 'addr=192.168.11.10'
> 
> Server Version:
> net-fs/nfs-utils
> ÂÂ Â ÂLatest version available: 1.1.4-r1
> ÂÂ Â ÂLatest version installed: 1.1.4-r1
> ÂÂ Â ÂSize of files: 574 kB
> ÂÂ Â ÂHomepage: Â Â Âhttp://linux-nfs.org/
> ÂÂ Â ÂDescription: Â NFS client and server daemons
> ÂÂ Â ÂLicense: Â Â Â GPL-2
> (server is on Gentoo, client on Ubuntu)

Note most of the NFS code is actually in the kernel, so the kernel
version(s) involved would be useful too.

--b.

> Thanks!
> Camden
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