[Samba] Hanging SMBD processes - Samba CRASHING
Gerald (Jerry) Carter
jerry at samba.org
Tue Dec 13 16:51:27 GMT 2005
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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.
> 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?
The tdb files make extensive use of byte range locking and a coherent
map implementation on the server.
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