samba - Sep 2002 - Samba 2.2.x & Solaris fcntl lock problem

Hi all,

We've had a couple of incidents where Samba 2.2.5 on Solaris 8 has stopped
accepting new connections...there are many smbd processes sitting there blocked
doing a: fcntl(7, F_SETLKW64, 0xFFBED5E0) (sleeping...)

We have around 400 users connecting on a daily basis.

This message from Samba 2.2.3 days seems to suggest that there was a problem on
Solaris with "fcntl locks with multiple processes contending for
locks":

http://lists.samba.org/pipermail/samba-technical/2002-April/036223.html


Could somebody please confirm if this has been fixed in later 2.2.x releases or
if there's a patch for Solaris?

Many thanks,
Jim

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On Mon, Sep 09, 2002 at 11:46:31AM +0100, Broughton, Jim
wrote:
> 
> Hi all,
> 
> We've had a couple of incidents where Samba 2.2.5 on Solaris 8 has
stopped accepting new connections...there are many smbd processes sitting there
blocked doing a: fcntl(7, F_SETLKW64, 0xFFBED5E0) (sleeping...)
> 
> We have around 400 users connecting on a daily basis.
> 
> This message from Samba 2.2.3 days seems to suggest that there was a
problem on Solaris with "fcntl locks with multiple processes contending for
locks":
> 
> http://lists.samba.org/pipermail/samba-technical/2002-April/036223.html
> 
> 
> Could somebody please confirm if this has been fixed in later 2.2.x
releases or if there's a patch for Solaris?
The situation is that it's a Solaris bug, with a patch available from Sun.  
There was an e-mail earlier today about it.
> NI Group reserves the right to monitor emails in accordance with the
Telecommunications (Lawful Business Practice) (Interception of Communications)
Regulations 2000.
Fun!

On Mon, Sep 09, 2002 at 11:46:31AM +0100, Broughton, Jim
wrote:
> 
> Hi all,
> 
> We've had a couple of incidents where Samba 2.2.5 on Solaris 8 has
stopped accepting new connections...there are many smbd processes sitting there
blocked doing a: fcntl(7, F_SETLKW64, 0xFFBED5E0) (sleeping...)
> 
> We have around 400 users connecting on a daily basis.
> 
> This message from Samba 2.2.3 days seems to suggest that there was a
problem on Solaris with "fcntl locks with multiple processes contending for
locks":
> 
> http://lists.samba.org/pipermail/samba-technical/2002-April/036223.html
> 
> 
> Could somebody please confirm if this has been fixed in later 2.2.x
releases or if there's a patch for Solaris?
This is not a problem Samba can fix, it is a "thundering herd"
problem with the Solaris implementation of fcntl locks.

There is a patch from Sun but I don't know if it's official
yet. DaveCB may know more.

Jeremy.