[Samba] oplock_break and Excel data corruption with Samba 2.2.3a

[Christian Barth]

If you do not care about the preformance you can turn of oplocks. 
Just set "oplocks = no" in smb.conf

Christian


> Hi everyone,
> 
> Just today one of our users informed me that a file she was working on in
> Microsoft Excel 97 got corrupted. She was working on the file directly on
> our server, which is running Samba 2.2.3a compiled using gcc-3.0.4 on
> Linux kernel 2.4.17-xfs and XFS-based filesystems.
> 
> I checked the Samba logs for her machine and found the following in a
> search for the filename of the Excel file she was working on:
> 
> [2002/03/01 10:52:42, 0] smbd/oplock.c:oplock_break(758)
>   oplock_break: receive_smb error (Success)
>   oplock_break failed for file Gov't Agencies/PAG-IBIG/PAG-IBIG LOAN LEDGER.xls (dev = 80a, inode = 9379268, file_id = 1).
> [2002/03/01 10:52:42, 0] smbd/oplock.c:oplock_break(843)
>   oplock_break: client failure in break - shutting down this smbd.
> [2002/03/01 10:52:42, 1] smbd/service.c:close_cnum(653)
>   payroll (192.168.0.20) closed connection to service ap
> [2002/03/01 10:52:42, 1] smbd/service.c:make_connection(615)
>   payroll (192.168.0.20) connect to service ap as user milanie (uid=1047, gid=50) (pid 26341)
> 
> There were about 19 occurences of this series one after the other, until I
> guess she hit that corruption (whatever actually caused it) and obviously
> gave up.
> 
> I double-checked my smb.conf and there are no special lines to modify any
> of the oplock settings. I double-checked the cable using a UTP cable
> tester and it's all okay. The machine she was using was running Microsoft
> Windows 95 with a 10Mbps NIC, a combination that's been stable so far.
> 
> Is there anything else I should check? I've heard she's not the only one
> who ran into Excel data corruption problems lately, except the others
> didn't report the incidents (grumble).
> 
> Is there anything I can do (even perhaps at the expense of performance) to
> make things more robust? I'm afraid our data might be going down the drain
> and I do not want that to happen. Yes, we have backups, but restoring
> yesterday's data everyday isn't our view of productivity. ;>
> 
> I would appreciate any thoughts or follow-up questions on this.
> 
> Please be kind enough to cc me replies to this thread as I am not on the
> Samba mailing list. I will continue to check the web archives, though.
> 
> Tanks a lot in advance.
> 
>  --> Jijo
> 
> --
> Federico Sevilla III  :: jijo at leathercollection.ph
> Network Administrator :: The Leather Collection, Inc.
> GnuPG Key: http://jijo.leathercollection.ph/jijo.gpg
> 
> 
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> 


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