[Samba] Hanging SMBD processes - Samba CRASHING

[Matt Johnson]

On Tue, 13 Dec 2005, Gerald (Jerry) Carter wrote:

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> On Thu, 8 Dec 2005, Matt Johnson wrote:
>
>> On Thu, 8 Dec 2005, Brian_Pickering at selinc.com wrote:
>>
>>> We've had similar troubles with Samba 3.x on our ClearCase VOB server
>>> running RHEL3.  Our fix was to go back to the old 2.2.12, and we haven't
>>> had a problem since.  Unfortunately I was never able to devote enough
>>> time
>>> to tracking down the problem fully.  I had hoped that upgrading to RHEL4
>>> using a 2.6 kernel would help, but your experience doesn't bode well for
>>> that.
>>
>> We had similar problems. stracing hung child smbd processes pointed the
>> finger at *local* locking issues: processes were hanging in
>> fcntl(...,F_SETLKW64,...) for one byte locks on fd 14 = locking.tdb; the
>> culprit function is tdb_brlock.
>
> What is the local filesystem?  And remind me what server OS this.
> RHEL 4 ?  Thanks.

Same problem on both ext3 and xfs. This is running on Mandrake 10.2 
(Mandriva Linux 2005 LE), with a 2.6.13 kernel.

Since turning off oplocks things have become *much* more stable, if 
rather slow.

-- 
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Matt Johnson <mwj at doc.ic.ac.uk>               (020) 7594 8440 / x48440
Systems Programmer, Computing Support Group         Office: Huxley 225
Department of Computing, Imperial College London
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