Bug 186454

It only happens when host exports more subdirectories:

gnu-1:/export         59106976  46132392   9972040  83% /net/gnu-1/export
gnu-1:/export/server  76920416  19143280  57773040  25% /net/gnu-1/export/server

This happens to me as well, under the same circumstances (host exports multiple
filesystems).  autofs never times out the mounts.  killall -v -USR1 automount
does cause the unused filesystems to be unmounted.  

Ian, do you want to take a look at this?

(In reply to comment #0)
> With autofs-4.1.4-16.2.2, autofs never umounts /net/host/dir after I did
> 
> # cd /net/host/dir
> # ls
> # cd /

I'm really going to need more information on this.

Could you have a look at Jeff Moyers people page and put together
the version information and a debug log as decsribed their please.

Ian is referring to this URL:

  http://people.redhat.com/jmoyer/

thanks.

Created attachment 127931 [details]
/var/log/debug

In /var/log/messages:

Apr 18 08:56:36 gnu-10 automount[9463]: starting automounter version
4.1.4-16.2.2, path = /net, maptype = program, mapname = /etc/auto.net
Apr 18 08:56:36 gnu-10 automount[9463]: using kernel protocol version 4.07
Apr 18 08:56:36 gnu-10 automount[9463]: using timeout 60 seconds; freq 15 secs
Apr 18 08:56:59 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1
Apr 18 08:58:05 gnu-10 automount[9501]: rm_unwanted: /net/gnu-1/export
Apr 18 08:58:05 gnu-10 automount[9501]: rm_unwanted: /net/gnu-1
Apr 18 08:58:05 gnu-10 automount[9501]: expired /net/gnu-1
Apr 18 08:58:05 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1
Apr 18 08:59:20 gnu-10 automount[9522]: rm_unwanted: /net/gnu-1/export
Apr 18 08:59:20 gnu-10 automount[9522]: rm_unwanted: /net/gnu-1
Apr 18 08:59:20 gnu-10 automount[9522]: expired /net/gnu-1
Apr 18 08:59:20 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1
Apr 18 09:00:35 gnu-10 automount[9542]: rm_unwanted: /net/gnu-1/export
Apr 18 09:00:35 gnu-10 automount[9542]: rm_unwanted: /net/gnu-1
Apr 18 09:00:35 gnu-10 automount[9542]: expired /net/gnu-1
Apr 18 09:00:35 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1
Apr 18 09:02:50 gnu-10 automount[9571]: rm_unwanted: /net/gnu-1/export
Apr 18 09:02:50 gnu-10 automount[9571]: rm_unwanted: /net/gnu-1
Apr 18 09:02:50 gnu-10 automount[9571]: expired /net/gnu-1
Apr 18 09:02:50 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1

Created attachment 127932 [details]
/var/log/debug

In /var/log/messages:

Apr 18 08:56:36 gnu-10 automount[9463]: starting automounter version
4.1.4-16.2.2, path = /net, maptype = program, mapname = /etc/auto.net
Apr 18 08:56:36 gnu-10 automount[9463]: using kernel protocol version 4.07
Apr 18 08:56:36 gnu-10 automount[9463]: using timeout 60 seconds; freq 15 secs
Apr 18 08:56:59 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1
Apr 18 08:58:05 gnu-10 automount[9501]: rm_unwanted: /net/gnu-1/export
Apr 18 08:58:05 gnu-10 automount[9501]: rm_unwanted: /net/gnu-1
Apr 18 08:58:05 gnu-10 automount[9501]: expired /net/gnu-1
Apr 18 08:58:05 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1
Apr 18 08:59:20 gnu-10 automount[9522]: rm_unwanted: /net/gnu-1/export
Apr 18 08:59:20 gnu-10 automount[9522]: rm_unwanted: /net/gnu-1
Apr 18 08:59:20 gnu-10 automount[9522]: expired /net/gnu-1
Apr 18 08:59:20 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1
Apr 18 09:00:35 gnu-10 automount[9542]: rm_unwanted: /net/gnu-1/export
Apr 18 09:00:35 gnu-10 automount[9542]: rm_unwanted: /net/gnu-1
Apr 18 09:00:35 gnu-10 automount[9542]: expired /net/gnu-1
Apr 18 09:00:35 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1
Apr 18 09:02:50 gnu-10 automount[9571]: rm_unwanted: /net/gnu-1/export
Apr 18 09:02:50 gnu-10 automount[9571]: rm_unwanted: /net/gnu-1
Apr 18 09:02:50 gnu-10 automount[9571]: expired /net/gnu-1
Apr 18 09:02:50 gnu-10 automount[9463]: attempting to mount entry /net/gnu-1

kernel-2.6.16-1.2080_FC5
autofs-4.1.4-16.2.2

Created attachment 128157 [details]
Patch which removes the problem

Attached is a patch that one of my coworkers created which remedies the problem
(and probably supplies enough information to get to the root cause).

See also bug 189535 where the same problem is being discussed.

(In reply to comment #9)
> Created an attachment (id=128157) [edit]
> Patch which removes the problem
> 
> Attached is a patch that one of my coworkers created which remedies the problem
> (and probably supplies enough information to get to the root cause). 
> 

I must admit it's tempting to apply this patch without further
fuss as I have commented these calls out in the version 5 development
for other less important reasons to see if there's a regression. So
I'd really like to wait till I've had a chance to test this out for
for a while.

The other concern is that this hasn't changed between the FC4 and
FC5 packages. So either a recent kernel patch has caused it or 
a process other than a GUI is responding to filesystem changes which
could have further implications.

2.6.16-1.2096_FC4 and autofs-4.1.4-15.1 on FC4 have no problems. I rebuilt
and installed autofs-4.1.4-15.1 on FC5. It doesn't solve the problem.

I installed 2.6.16-1.2096_FC4 and autofs-4.1.4-15.1 on FC5. The problem
still persists. So the cause is somewhere else.

After I ran

[root@gnu-65 log]# /etc/init.d/haldaemon stop

the problem went away.

(In reply to comment #14)
> After I ran
> 
> [root@gnu-65 log]# /etc/init.d/haldaemon stop
> 
> the problem went away.

Excellent work.

I really couldn't see anything autofs that would cause this.
I'll check into this.

Thanks.
Ian

(In reply to comment #15)
> (In reply to comment #14)
> > After I ran
> > 
> > [root@gnu-65 log]# /etc/init.d/haldaemon stop
> > 
> > the problem went away.
> 
> Excellent work.
> 
> I really couldn't see anything autofs that would cause this.
> I'll check into this.

Can you try the latest version of the HAL package please.
I believe this problem is fixed.

Ian

What is the latest verion of HAL? I am runnig hal-0.5.7-3.fc5.1.

(In reply to comment #17)
> What is the latest verion of HAL? I am runnig hal-0.5.7-3.fc5.1.

Sorry, I'm a bit impacient.
I see the fix is currently in the Rawhide version.
I'll let you know when it makes it into fc5.

Ian

(In reply to comment #18)
> (In reply to comment #17)
> > What is the latest verion of HAL? I am runnig hal-0.5.7-3.fc5.1.
> 
> Sorry, I'm a bit impacient.
> I see the fix is currently in the Rawhide version.
> I'll let you know when it makes it into fc5.
> 

This version of HAL appears to be have been in FC-5 for a
while now, sorry I didn't let you know earlier.

Can you check that this problem is now resolved.

hal-0.5.7-3.fc5.2 fixes the problem.