samba - Mar 2007 - "rec_read bad magic" error when printing... again

Hello,

some of my servers regularly come up with this error, which makes printing 
over samba impossible:

Mar  6 09:06:44 server smbd[4431]: [2007/03/06 09:06:44, 0] 
tdb/tdbutil.c:tdb_log(772)
Mar  6 09:06:44 server smbd[4431]:   
tdb(/var/cache/samba/printing/printer.tdb): rec_read bad magic 0xd9fee666 at 
offset=22796

Searching mailing lists, I just found the "solution" to stop samba,
delete the
tdb file, and restart it.

I am in charge of 25 servers of this kind and would be happy for a 
more "professional" solution to this... :-)

Is there any... ?

Otherwise I guess I will set up a cronjob to remove the file on a nightly 
base... :-| Please tell me there is a better way :-)


best regards,
Yves

On Tue, Mar 06, 2007 at 10:02:35AM +0100, Yves Glodt
wrote:
> some of my servers regularly come up with this error, which makes printing 
> over samba impossible:
> 
> Mar  6 09:06:44 server smbd[4431]: [2007/03/06 09:06:44, 0] 
> tdb/tdbutil.c:tdb_log(772)
> Mar  6 09:06:44 server smbd[4431]:   
> tdb(/var/cache/samba/printing/printer.tdb): rec_read bad magic 0xd9fee666
at
> offset=22796
If this really happens often to you, then you have some
basic problems with your setup. Either your hardware is
flaky or your smbd processes tend to crash. If you happen to
use reiserfs for /var/cache/samba you might try to change
that fs to ext3.

Volker
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On Tuesday 06 March 2007 11:01, Volker Lendecke wrote:
> On Tue, Mar 06, 2007 at 10:02:35AM +0100, Yves Glodt wrote:
> > some of my servers regularly come up with this error, which makes
> > printing over samba impossible:
> >
> > Mar  6 09:06:44 server smbd[4431]: [2007/03/06 09:06:44, 0]
> > tdb/tdbutil.c:tdb_log(772)
> > Mar  6 09:06:44 server smbd[4431]:
> > tdb(/var/cache/samba/printing/printer.tdb): rec_read bad magic
0xd9fee666
> > at offset=22796
>
> If this really happens often to you, then you have some
> basic problems with your setup.
The setup is a stock Ubuntu 6.06, using only ubuntu packages.
I have 25 servers and it happens about once a week in total.
(This might not sound like a lot, but it creates a support ticket on each 
occurrence..)
> Either your hardware is 
> flaky
I can not know 100% of course, but apart of the printing problem, the boxes 
run very well.
> or your smbd processes tend to crash.
I never had an smbd crashing so far (AFAIK). Samba version is 3.0.22.
> If you happen to  
> use reiserfs for /var/cache/samba you might try to change
> that fs to ext3.
All my partitions are ext3, /var being on a separate one as well.

is it worth that I increase the loglevel, or is there anything else I can 
watch for?

I read somewhere that samba V3 would be able to recreate the tdb while 
running, but could not find a parameter for that. Is it possible at all?

yves
> Volker