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Date:      Thu, 21 Jan 1999 21:12:21 +0100
From:      Andre Albsmeier <andre.albsmeier@mchp.siemens.de>
To:        "David E. Cross" <crossd@cs.rpi.edu>
Cc:        current@FreeBSD.ORG
Subject:   Re: mountd
Message-ID:  <19990121211221.A11186@internal>
In-Reply-To: <199901211554.KAA28454@cs.rpi.edu>; from David E. Cross on Thu, Jan 21, 1999 at 10:54:36AM -0500
References:  <199901211554.KAA28454@cs.rpi.edu>

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On Thu, 21-Jan-1999 at 10:54:36 -0500, David E. Cross wrote:
> I posted this awhile ago to -questions, but never received a reply.
> 
> We have a number of FreeBSD NFS servers here. Occasionally we need to 
> change the exports list on the servers and send mountd a SIGHUP.  This
> leads to a condition that in many ways is much worse than a server reboot.
> 
> What happens is for the duration of mountd reading the exports file it denies
> all NFS requests.  This has a number of bad effects; 1) any user home and
> system directories become unavailable, with the error 'permission denied' 2)
> (and this is far worse), any process with a mapped .text segment off of the
> NFS server, should it branch to code not in the cache gets immediately killed.
> This include user processes that are running from home directories, and system
> processes (such as ssh).  If we were to reboot the machine it would just
> hang those connections until the machine came back, without killing anyone.
> 
> Is there a solution to this problem?  I know that none of HP-UX, IRIX, or
> Solaris have this problem.


Please, please, if anyone knows a solution for this, drop me a note also...

Thanks,

	-Andre

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