Debian Bug report logs - #23643
dselect isn't `still trying'

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: "M.C. Vernon" <mcv21@cus.cam.ac.uk>

To: Debian automatic bug reporting system <submit@bugs.debian.org>

Subject: dselect isn't `still trying'

Date: Wed, 17 Jun 1998 17:16:19 +0100 (BST)

Package: dpkg
Version: 1.4.0.22

when running dselect, and using nfs as the access method, after selecting
install, the following occured:

Unpacking replacement tetex-base ...
NFS server 193.63.255.4 not responding, still trying.

dselect then hangs, and is clearly not still trying (I have left it for 24
hours before, and nothing happens). I then try to exit with ^C, and run
install again, and this happens:

mount: 193.63.255.4:/public/pub/unix/Linux/debian already mounted or
/var/lib/dpkg/methods/mnt busy
mount: according to mtab, 193.63.255.4:/public/pub/unix/Linux/debian is
already
mounted on /var/lib/dpkg/methods/mnt

installation script returned error exit status 1.
Press RETURN to continue.

Then if I quit dselect, and run it again, on trying to remount the nfs
server (via the access option), I get:

What is the pathname on the NFS server of the filesystem with
the Debian files ? [/public/pub/unix/Linux/debian]
mount: 193.63.255.4:/public/pub/unix/Linux/debian already mounted or
/var/lib/dpkg/methods/mnt busy
mount: according to mtab, 193.63.255.4:/public/pub/unix/Linux/debian is
already
mounted on /var/lib/dpkg/methods/mnt
Unable to mount NFS filesystem 193.63.255.4:/public/pub/unix/Linux/debian.

Then I try to unmount the mounted filesystem:

root@pick:~# mount
/dev/hda1 on / type ext2 (rw,errors=remount-ro)
proc on /proc type proc (rw)
nymph.csi.cam.ac.uk:/linux on /mnt type nfs (rw,addr=131.111.10.245)
193.63.255.4:/public/pub/unix/Linux/debian on /var/lib/dpkg/methods/mnt
type nfs (ro,nosuid,nodev,addr=193.63.255.4)
root@pick:~# umount /var/lib/dpkg/methods/mnt/
umount: /var/lib/dpkg/methods/mnt: device is busy

Even killing the dpkg process doesn't unmount the device:
root@pick:~# ps
  PID TTY STAT TIME COMMAND
  202   8 SW   0:00 (getty)
  203   9 SW   0:00 (getty)
  204  10 SW   0:00 (getty)
  205  11 SW   0:00 (getty)
21748   2 S    0:25 ssh cus.cam.ac.uk
21918   5 SW   0:00 (sash)
21970   5 S    0:00 bash
25754   5 S    0:12 (dpkg-deb)
25818   6 S    0:00 sash
25819   6 S    0:00 bash
25849   5 R    0:00 ps
root@pick:~# kill 25754
root@pick:~# umount /var/lib/dpkg/methods/mnt/
umount: /var/lib/dpkg/methods/mnt: device is busy
root@pick:~# pwd
/root

The only solution is to kill -9 the dpkg process:

root@pick:~# kill -9 25754
root@pick:~# umount /var/lib/dpkg/methods/mnt/

Is there something I'm doing wrong?

Yours,

Matthew

-- 
Elen sila lumenn' omentielvo

Steward-elect of the Cambridge Tolkien Society
Selwyn College Computer Support
http://www.geocities.com/Area51/Chamber/8841/
http://www.cam.ac.uk/CambUniv/Societies/tolkien/
http://pick.sel.cam.ac.uk/

Message #10 received at 23643@bugs.debian.org (full text, mbox, reply):

From: Wichert Akkerman <wakkerma@wiggy.ml.org>

To: matthew@sel.cam.ac.uk, 23643@bugs.debian.org

Subject: Re: Bug#23643: dselect isn't `still trying'

Date: Thu, 18 Jun 1998 17:27:40 +0200

[Message part 1 (text/plain, inline)]

Previously M.C. Vernon wrote:
> Unpacking replacement tetex-base ...
> NFS server 193.63.255.4 not responding, still trying.

That's not dpkg, it's a kernel message. dpkg doesn't even know this
problem is occuring.

Wichert.

-- 
==============================================================================
This combination of bytes forms a message written to you by Wichert Akkerman.
E-Mail: wakkerma@wi.LeidenUniv.nl
WWW: http://www.wi.leidenuniv.nl/~wichert/

[Message part 2 (application/pgp-signature, inline)]

Message #15 received at 23643@bugs.debian.org (full text, mbox, reply):

From: "M.C. Vernon" <mcv21@cus.cam.ac.uk>

To: Wichert Akkerman <wakkerma@wiggy.ml.org>

Cc: matthew@sel.cam.ac.uk, 23643@bugs.debian.org

Subject: Re: Bug#23643: dselect isn't `still trying'

Date: Thu, 18 Jun 1998 16:30:16 +0100 (BST)

> Previously M.C. Vernon wrote:
> > Unpacking replacement tetex-base ...
> > NFS server 193.63.255.4 not responding, still trying.
> 
> That's not dpkg, it's a kernel message. dpkg doesn't even know this
> problem is occuring.

In that case:

a) should the bug be transferred to another package (can you do this)
b) Is dpkg's refusal to unmount cleanly a bug?

Yours,

Matthew

-- 
Elen sila lumenn' omentielvo

Steward-elect of the Cambridge Tolkien Society
Selwyn College Computer Support
http://www.geocities.com/Area51/Chamber/8841/
http://www.cam.ac.uk/CambUniv/Societies/tolkien/
http://pick.sel.cam.ac.uk/

Message #20 received at 23643@bugs.debian.org (full text, mbox, reply):

From: launch@launchmaster.com

To: 23643@bugs.debian.org

Subject: Is Your Web Site A Secret?

Date: Sun, 13 Dec 1998 02:15:40 -0500

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Message #25 received at 23643@bugs.debian.org (full text, mbox, reply):

From: Cyrille Chepelov <chepelov@calixo.net>

To: 23643@bugs.debian.org

Subject: It's an NFS bug

Date: Wed, 25 Jul 2001 14:18:06 +0200

It's an NFS bug ; perhaps reassign to nfs-client, or the kernel ? 

But this is a problem by design in NFS. dpkg can't umount, since there's a     
process (itself) stuck waiting for a NFS reply. Problem in (probably) the   
Linux implementation, such a process is next to unkillable, which makes
umounting the partition a bit hard.

Will close this bug in 2 weeks.

	-- Cyrille

-- 
Grumpf.

Message #30 received at 23643-done@bugs.debian.org (full text, mbox, reply):

From: Wichert Akkerman <wichert@wiggy.net>

To: Cyrille Chepelov <chepelov@calixo.net>, 23643-done@bugs.debian.org

Subject: Re: Bug#23643: It's an NFS bug

Date: Wed, 25 Jul 2001 14:20:34 +0200

Previously Cyrille Chepelov wrote:
> It's an NFS bug ; perhaps reassign to nfs-client, or the kernel ? 

Kernel thing indeed. The fix is to use the intr flag for NFS mounts so
you can interrupt it.

> Will close this bug in 2 weeks.

Lets close it now :)

Wichert.
>

-- 
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