Re: [autofs] autofs default behavior on syminks?

[idiot)_) supreme]

Hi Ian

 

Thanks for replying.  I should clarifiy our problems a little bit.

 

For the most part, we only see this error on the 2.6.5 with 4.1.0 and all of the kernel patches.  We do not really see this on 2.4.22/4.1.0 and kernel patches.  When all of the machines are running, we see it about 2x an hour.  I have tried raising the timeouts to 1 hour (so they never umount once mounted) but I won't know if this "works" until next week.  Our previous timeouts were 5 minutes.   I have also recently tried raising retry, timeo, and other variables, but don't know if will work unti next week.  I have not tried 4.1.2 yet.

 

 

We see this error in /var/log/messages

Apr  9 22:16:00 e232 automount[17404]: >> mount: RPC: Remote system error - Connection timed out
Apr  9 22:16:00 e232 automount[17404]: mount(nfs): nfs: mount failure emc1.bbn.com:/u11 on /net/emc/u11
Apr  9 22:16:00 e232 automount[17404]: failed to mount /net/emc/u11

 

I can correspond these /var/log/messages logs to error logs in our job running system

 

29763 K    *username*  @ e232        5  e200        racks5n6   "13022-SCTM_X-tr-GI-1-2-05"
22:16:00: can't open task output /d4m/ears/expts/13009/logfiles/13009-SCTM_NX-tr-GI-1-1-6.log: No such file or directory
22:16:04: reap pid 17403, task 29843, exit 0
22:16:04: syncing with db

The file it can't open is really a link to /net/emc/u11 (which is the what automount reports a failure on)

This is why I asked about autofs link behavior.

 

Thanks again for your help.  IF there is any test you want me to run, let me know.

 

Eric

 

>From: [EMAIL PROTECTED]

>To: "idiot)_) supreme" <[EMAIL PROTECTED]>

>CC: [EMAIL PROTECTED]

>Subject: Re: [autofs] autofs default behavior on syminks?

>Date: Sun, 11 Apr 2004 14:14:17 +0800 (WST)

>

>On Sat, 10 Apr 2004, idiot)_) supreme wrote:

>

> > Hi all

> >

> > We are running autofs4.1.0 with 2.4.22 on about 100 machines, and 2.6.5 on

> > about 100 machines with all of the the kernel patches for both.

>

>Cool. I'm keen to hear how things go. Especially with 2.6.

>A note to the list from time to time would be appreciated.

>

> >

> >

> > What is autofs's behavior trying to cross symlinks when you type 'ls'?

> > autofs seems to time out a lot faster than AMD for example.

> >

> > We are occasionally seeing problems timeouts trying to cross symlinks.  If I

> > type 'ls' it might show

> >

> > abc -> /net/emc/u11

> >

> > as a broken symlink

> >

> > but if I type 'ls /net/emc/u11'

> > the symlink comes back.

> >

>

>In this case autofs doesn't do anything special with symlinks.

>The colour ls does the 'stat'ing and the results are shown.

>

>This does sound like an autofs bug or lilitation perhaps.

>Indeed 'stat'ing the mountpoint itself should not mount it, otherwise we

>would get undesired mounts, so autofs lies and gives the stat of

>the autofs directory instead of the mounted. Actually autofs just doesn't

>do anything.

>

>It's interesting that the symlink shows broken occasionally and not all

>the time. There must be a bad return coming back for some reason. So

>how occasionally?

>

>Perhaps the 'stat' occurs during an expire sometimes. That could cause a

>fail return.

>

>Ian

>

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