SUMMARY: Problems with automountd

<Original post below>

Hi agn,

and thanks to all who replied - got the first replies 5 minutes after my
posting, :-)
I delayed the summary, since I did want to see if the daemon survives the
night - well, it did, so, here's the solution:

There was a script running at 4 o'clock, searching for coredumps,
.bak-files, etc. This script starts its search in the root-dir, and descends
into every dir. It seems the automountd doesn't likes this, :-)
So, I deactivated the script, and voila - the daemon runs stable!
Now, I only have to figure out why the script crashes - I had it running for
abt. 2 years, without any problems. Hm... Maybe I should stop automountd
before starting the script, wait until it's finished, and start the daemon
again.

Special thanks to Casper Dik, who pointed me in the right direction, and
Mark Cain, Francois Legal, Rajeev Jain and Tom Crummey for helpful hints!

Have a nice hackin',

Harald

============================================
Harald Husemann
Systems Engineer
Teammanager Unix administration and Configuration Management
Materna Gmbh - Vo_kuhle 37 -
D-44141 Dortmund, Germany
Phone:  +49-231-5599-8684
Mobile: +49-179-2300651

Hi Gurus,

we're having a BIG problem here:

In the last two nights, our complete network has failed. We're using NIS,
with one NIS-Master and a slave, and NFS to mount the home-dirs.
It seems that every night at 4 o' clock the automountd on all servers stops,
and we're unable to restart it.
The following is a screenshot of what happens when I try to restart the
automountd:

========================/snip/==================
Last login: Tue May  6 10:23:26 2003
Sun Microsystems Inc.   SunOS 5.8       Generic February 2000
Sun Microsystems Inc.   SunOS 5.8       Generic February 2000
You have mail.
# bash
bash-2.03# /usr/lib/autofs/automountd -T -v
bash-2.03# t1   READDIR REQUEST : -xfn/_x500 @ 100000

bash-2.03# ps -ef | grep auto
    root  9774  9729  0 10:29:31 pts/1    0:00 grep auto
bash-2.03#
====================/snap/========================================

As it shows, the automountd does a readdir request to an xfn-dir - and
that's it, its gone...
The content of our /etc/auto_master is:

========================/snip/=================================
# Master map for automounter
#
+auto_master
/net            -hosts          -nosuid,nobrowse
/home_nfs              auto_home       -nobrowse
/xfn           -xfn
=========================/snap/================================

I've commented out both the /home_nfs and the /xfn entry, but without
success - same behaviour, the daemon starts, and fails a few seconds later
with the above message.
When I reboot the machines, the automountd comes up and runs - until 4 o'
clock...
(There are some cronjobs, e.g. a quota-checker running at 4 o' clock - but I
can't imagine that this is the problem...)

Any ideas?? Hope someone can help us, since it's a real severe problem which
blocks our complete network...

Thanks, and have a nice hackin',

Harald
============================================
Harald Husemann
Systems Engineer
Teammanager Unix administration and Configuration Management
Materna Gmbh - Vo_kuhle 37 -
D-44141 Dortmund, Germany
Phone:  +49-231-5599-8684
Mobile: +49-179-2300651
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