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Date: Thu, 12 Jan 2006 16:05:45 -0800 (PST)
From: Doug Barton <dougb@FreeBSD.org>
To: Michael Sperber <sperber@informatik.uni-tuebingen.de>
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Cc: freebsd-stable@freebsd.org
Subject: Re: mountd fails intermittently
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On Thu, 29 Dec 2005, Michael Sperber wrote:

>
> Michael Sperber <sperber@informatik.uni-tuebingen.de> writes:
>
>> I'm running 5.4-STABLE (about two weeks old), and have just set up an
>> NFS server for the first time.  Remote mounts sometimes work fine, and
>> sometimes fail.
>>
>> The symptoms are that "showmount -e" sez
>>
>> showmount: can't do exports rpc
>>
>> and that "rpcinfo -u <host> mountd" often works fine n times in a row,
>> and then stops working, like so:
>
> Turns out that mountd seems to be trying to do reverse DNS
> lookups, and when those block, the whole process locks up.  I don't
> understand why, though: the servers listed in /etc/exports are by IP.
> Any ideas?

NFS is twitchy in a lot of ways, you've found one of them. IME, it's easier 
all the way around for clients and server to have entries for each other in 
/etc/hosts.

hth,

Doug

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