Re: Is it normal for autofs to remount a file system more than once?

[Terrence Martin <tmartin@physics.ucsd.edu>]

Hi,

Aparently it looks like I have a problem

cat /proc/mounts
automount(pid4347) /home autofs rw 0 0
192.168.20.3:/home/cdfcaf /home/cdfcaf nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.20.3 0 0
192.168.20.3:/home/cdfsoft /home/cdfsoft nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.20.3 0 0
192.168.10.5:/falcon/0/users /home/users nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.10.5 0 0
automount(pid23831) /home autofs rw 0 0
192.168.20.3:/home/cdfcaf /home/cdfcaf nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.20.3 0 0
192.168.20.3:/home/cdfsoft /home/cdfsoft nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.20.3 0 0
automount(pid18432) /home autofs rw 0 0
192.168.20.3:/home/cdfcaf /home/cdfcaf nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.20.3 0 0
192.168.20.3:/home/cdfsoft /home/cdfsoft nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.20.3 0 0
frontend-3.local:/export/home/install /home/install nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=frontend-3.local 0 0
automount(pid29678) /home autofs rw 0 0
192.168.10.5:/falcon/0/users /home/users nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.10.5 0 0
automount(pid3017) /home autofs rw 0 0
automount(pid3047) /netstor autofs rw 0 0
automount(pid3077) /afs autofs rw 0 0
automount(pid3105) /groot autofs rw 0 0
192.168.10.5:/falcon/0/users /home/users nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.10.5 0 0
frontend-3.local:/export/home/install /home/install nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=frontend-3.local 0 0
192.168.20.3:/home/cdfsoft /home/cdfsoft nfs 
rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=192.168.20.3 0 0

Several entries occure more than once.

I am not sure what you are meaning by multiple name spaces with regards 
to autofs?

Also my kernel is a RedHat RHEL3 stock kernel.

uname -a
Linux compute-3-4.local 2.4.21-4.0.1.ELsmp #1 SMP Sat Nov 29 04:15:49 
GMT 2003 i686 i686 i386 GNU/Linux

Autofs version 3.1.7-41

Terrence

Mike Waychison wrote:

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>Terrence Martin wrote:
>  
>
>>Hi,
>>
>>I am not sure if this is related to my NFS mount hanging problems, but I
>>have noticed that autofs will often remount a file system multiple
>>times.  Is this normal? I think I have pretty straight forward auto.
>>files....
>>
>>Terrence Martin
>>UCSD Physics
>>
>>mount
>>    
>>
>
>  
>
>>df
>>    
>>
>
>
>Both of these tools get their mount information from /etc/mtab, a plain
>text file.  This file can get out of sync for a variety of reasons
>unfortunately.  Some common reasons I usually see are:
>
>- - You may be using multiple namespaces.  [u]mount(8) doesn't know how to
>handle this.
>- - [u]mount(8) has trouble getting a lock on the file, so it has trouble
>updating.
>
>The only way to see an accurate picture of your mount tree is to look at
>/proc/mounts.  If this file has multiple entries for your automounted
>filesystem, then there indeed is a problem.
>
>Btw, you didn't mention which kernel(+patches?) and automount version
>are you using.  That would help :)
>
>Thanks,
>
>- --
>Mike Waychison
>Sun Microsystems, Inc.
>1 (650) 352-5299 voice
>1 (416) 202-8336 voice
>http://www.sun.com
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>NOTICE:  The opinions expressed in this email are held by me,
>and may not represent the views of Sun Microsystems, Inc.
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