On Thu, Jun 01, 2006 at 03:02:53PM -0700, Mark Morley
wrote:> Hi all,
>
> We have an NFS server (amd64) running FreeBSD 6.1-STABLE. It serves a
dozen
> or so clients which are a mix of FreeBSD 4.11 and 6.1-STABLE. All NFS
traffic
> is on a dedicated gigabit switched network.
>
> Periodically we have a problem where it will stop serving up files.
Running 'ps'
> on the server shows a number of processes stuck in the 'D' state --
"a process in
> disk (or other short term, uninter-ruptible) wait".
>
> Usually this includes all the nfsd processes as well as any others that are
trying
> to access the same disk drive. Any commands issued like 'du',
'sync', etc. go into
> the same state and never exit. It is impossible to kill any of these
processes.
>
> We can pretty much force this to happen by running a large 'find'
or something
> similar on the exported file system, although it will happen itself
eventually
> without any such commands being run.
>
> Our only option (as far as we can tell) is to reboot the server, which
results in
> a very long fsck period (it's over a terrabyte of disk space).
>
> This doesn't seem to be a hardware issue. This is a brand new server
in all respects
> (all new hardware, new RAID) and we saw the exact same issue on the machine
that it
> replaced (which was running 4.11 on i386).
>
> Any thoughts on this? Any more info I should provide?
Please post your kernel config.
Kris
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