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From: Jeff Aitken <jaitken@vt.edu>
Message-Id: <199509130019.UAA05907@huron.aitken.com>
Subject: problem with df(1)
To: bugs@freebsd.org
Date: Tue, 12 Sep 1995 20:19:06 -0400 (EDT)
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[I tried using send-pr to send this, but it was returned.  I've included
the entire error portion of the message so that whoever is responsible
for send-pr will know what happened.]

Forwarded message:
> From jaitken Tue Sep 12 20:05:23 1995
> Date: Tue, 12 Sep 1995 17:03:35 -0700
> From: Mail Delivery Subsystem <MAILER-DAEMON@freefall.freebsd.org>
> Subject: Returned mail: unknown mailer error 2
> Message-Id: <199509130003.RAA15692@freefall.freebsd.org>
> To: <jaitken@vt.edu>
> MIME-Version: 1.0
> Content-Type: multipart/mixed; boundary="RAA15692.810950615/freefall.freebsd.org"
> 
> This is a MIME-encapsulated message
> 
> --RAA15692.810950615/freefall.freebsd.org
> 
> The original message was received at Tue, 12 Sep 1995 17:03:33 -0700
> from jaitken.async.vt.edu [128.173.18.165]
> 
>    ----- The following addresses had delivery problems -----
> "| /usr/local/lib/gnats/queue-pr -q >/dev/null 2>&1"  (unrecoverable error)
>     (expanded from: <FreeBSD-gnats-submit@freebsd.org>)
> 
>    ----- Transcript of session follows -----
> 554 "| /usr/local/lib/gnats/queue-pr -q >/dev/null 2>&1"... unknown mailer error 2
> 
>    ----- Original message follows -----
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> --RAA15692.810950615/freefall.freebsd.org
> Content-Type: message/rfc822
> 
> Return-Path: jaitken@vt.edu
> Received: from huron.aitken.com (jaitken.async.vt.edu [128.173.18.165])
>           by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id RAA15691
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> Received: (from jaitken@localhost) by huron.aitken.com (8.6.11/8.6.9) id UAA03539; Tue, 12 Sep 1995 20:04:49 -0400
> Date: Tue, 12 Sep 1995 20:04:49 -0400
> From: Jeff Aitken <jaitken@vt.edu>
> Message-Id: <199509130004.UAA03539@huron.aitken.com>
> To: FreeBSD-gnats-submit@freebsd.org
> Subject: bug in df(1)
> Reply-To: jaitken@vt.edu
> X-send-pr-version: 3.2
> 
> 
> >Submitter-Id:   current-users
> >Originator:     Jeff Aitken
> >Organization:   Jeff Aitken
> jaitken@vt.edu
> >Confidential: no
> >Synopsis: df(1) hangs when an NFS server disappears
> >Severity: serious
> >Priority:       
> >Category: bin
> >Release: FreeBSD 2.0-BUILT-19950603 i386
> >Class: sw-bug
> >Environment: 
> 
> FreeBSD 2.0.5-RELEASE on a 486 DX2/66 PCI.  I mount a single directory
> via NFS from an Ultrix 4.4 box on the same subnet.
> 
> >Description: 
> 
> If the Ultrix box goes away before I unmount the NFS-mounted filesystem,
> the df(1) command hangs.  Furthermore, it cannot be killed (not even
> kill -9 as root does anything).  The df process appears to be stuck in
> disk wait; it is listed as follows by ps(1):
> 
> jaitken	2967  0.0  0.1   216  12  p1- D   -		0:00.00  (df)
> root	2994  0.0  0.1   216  12  v2- D   -		0:00.00  (df)
> 
> >How-To-Repeat: 
> 
> Mount an NFS filesystem, and remove the NFS server (in my case it was
> turned off, but I imagine the same thing would happen if you simply
> disconnected it from the network).
> 
> >Fix: 
> 	
> I have no idea.  I'm not so concerned with df hanging as I am with the
> fact that I cannot kill the process once it is hung.
> 
> 
> --RAA15692.810950615/freefall.freebsd.org--
> 
> 


-- 
Jeff Aitken
jaitken@vt.edu