Re: Seeing some 5.0.1 stop expiring mounts

[Ian Kent <raven@themaw.net>]

On Wed, 2007-07-18 at 14:39 -0700, Mike Marion wrote:
> On Wed, Jul 18, 2007 at 02:46:07PM +0800, Ian Kent wrote:
> 
> > Might be worth considering going to 5.0.2, especially since you have a
> > busy site, as a nasty deadlock in the alarm handler has been fixed. 
> 
> Unfortunately, we can't.  I've since found out (through trial and error)
> that the patch:
> > > autofs-5.0.1-map-update-source-only.patch

Oops!

> 
> is completely broken for us, and it appears to be part of the 5.0.2
> codebase now.
> 
> Our main setup for auotofs5 clients now is pure ldap.. auto_master is in
> ldap, nsswitch.conf has
> automount: ldap
> everything is in ldap.  We remove all /etc/auto.* files too.
> 
> With the above patch applied to 5.0.1 (or using 5.0.2) as soon as the
> daemon gets a HUP signal, it flushes out all the auto.projects (our main
> map) entries from /proc/mounts and they're gone forever.
> 
> When first started, and until the daemon gets a HUP, it works fine.  Our
> /proc/mounts has 6200+ entries (we have a crapload of paths) and
> they'll mount great.  Entries look as expected, e.g.:
> auto.projects /prj/qct/gv autofs rw,fd=6,pgrp=2571,timeout=600,minproto=5,maxproto=5,direct 0 0
> then if you mount it, it adds in:
> ronald:/vol/eng_ice_0014/qct_gv /prj/qct/gv nfs rw,v3,rsize=32768,wsize=32768,acregmin=1,acregmax=5,acdirmin=1,acdirmax=5,hard,lock,proto=tcp,addr=ronald 0 0
> 
> After the HUP, the thing flushes, then logs a ton of rm_dir errors..
> like so:
> 
> Start of daemon:
> automount[2571]: mounted direct mount on /prj/qct/gv with timeout 600, freq 150 seconds
> 
> Flush after HUP:
> automount[2572]: umounted direct mount /prj/qct/gv
> 
> After all umounts.. these errors show for every path:
> automount[2549]: rmdir_path: lstat of /prj/qct/gv failed.
> 
> I did a test with 5.0.1 with all patchs sans the
> autofs-5.0.1-map-update-source-only.patch and it's fine... I can HUP
> left and right, do kill -USR1 to flush, etc.  Works right.  But rebuild again
> with that patch and first HUP breaks all our auto.projects paths.  Weird
> thing is the /net and /usr2 (indirect home dirs) stay working.  Those
> entries look like:
> $ egrep 'auto.home|/net' /proc/mounts | grep -v auto.projects
> -hosts /net autofs rw,fd=9,pgrp=13948,timeout=600,minproto=5,maxproto=5,indirect 0 0
> auto.home /usr2 autofs rw,fd=14,pgrp=13948,timeout=600,minproto=5,maxproto=5,indirect 0 0

So it sounds like the direct mounts are unhappy with this or possibly
the LDAP module.

I'll try to duplicate the problem.

Ian