[Samba] Hanging SMBD processes - Samba CRASHING
Brian_Pickering at selinc.com
Brian_Pickering at selinc.com
Thu Dec 8 21:15:12 GMT 2005
I never was able to strace or delve too much into the debug logs when we
were having problems, since about 100 developers were yelling at me any
time it crashed. The symptoms though were identical: no new connections
could be made, tons of smbd processes stacking up which wouldn't die
except by kill -9, and lots of stale locks listed with smbstatus. About
the only thing I had time to do while I was compiling 2.2.12 was to stop
the master smbd process, kill -9 the rest, remove the tdb files, and
restart. Hopefully I'll get a chance to do some more thorough testing
with RHEL4 before it goes production.
I'm running the IBM/Rational recommended samba settings, which also shuts
off oplocks.
--------------------------------------------
Brian Pickering
System Administrator - Information Services
Schweitzer Engineering Laboratories, Inc.
Email - Brian_Pickering at selinc.com
Telephone - 509-332-1890 x1212
Matt Johnson <mwj at doc.ic.ac.uk>
12/08/2005 11:58 AM
To
Brian_Pickering at selinc.com
cc
samba at lists.samba.org
Subject
Re: [Samba] Hanging SMBD processes - Samba CRASHING
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.
Turning off oplocks seems to have helped, but we'd also like to get to
the bottom of this... is this fcntl/locking hang behavior what you are
seeing too?
Matt
--
======================================================================
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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