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Date:      Thu, 26 May 2005 08:41:34 -0700
From:      Kris Kennaway <kris@obsecurity.org>
To:        Viren Patel <virenp@mail.utexas.edu>
Cc:        freebsd-questions@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject:   Re: NFS broken after upgrading to 5.4
Message-ID:  <20050526154133.GA38205@xor.obsecurity.org>
In-Reply-To: <1144.66.25.129.27.1117111793.squirrel@mail.cm.utexas.edu>
References:  <1282.66.25.129.27.1117067480.squirrel@mail.cm.utexas.edu> <20050526010713.GA92954@xor.obsecurity.org> <1475.66.25.129.27.1117071597.squirrel@mail.cm.utexas.edu> <20050526014526.GA7378@xor.obsecurity.org> <1144.66.25.129.27.1117111793.squirrel@mail.cm.utexas.edu>

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On Thu, May 26, 2005 at 07:49:53AM -0500, Viren Patel wrote:
> >
> > What does ^T show for the status of the 'hung' process?
> > Are you
> > certain that DNS resolution is working correctly on both
> > machines?
> >
> > Kris
> >
> >
>=20
> Thanks for your help. Interestingly when I tried the
> mounts this morning they all worked, so I can't provide ^T
> output. Go figure.
>=20
> Since my clients and the server are communicating over a
> private LAN, they don't use DNS. However
> /etc/nsswitch.conf contains:
>=20
>    hosts: files dns
>=20
> and in /etc/hosts I have:
>=20
>    127.0.0.1               localhost
>    192.168.0.10            backuphost
>=20
> The problem occurred whether I used IP or hostname. I've
> also noticed that mount_nfs tended to succeed if preceded
> by a ping to the backuphost. I rebooted a client and tried
> mounting without ping and it worked just fine. It's all
> behaving really flakily. Basically it amounts to sometimes
> it works and sometimes it doesn't and there doesn't seem
> to be a pattern.

Are you sure they're not using DNS?  i.e. will DNS queries to those
hostnames resolve?  Have you observed the data traffic using tcpdump
to confirm no DNS lookups?

Kris


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