[Samba] File Locking, Access - Inconsistencies

[Jeremy Allison]

On Tue, Aug 11, 2009 at 11:49:09PM +0530, ravi channavajhala wrote:
> Lately I'm seeing bizarre problems with the SAMBA server I'm using in
> production.  For no rhyme or reason the connections get dropped, the same
> set of users who previously were able to access the shares, now get
> permission denied.  Users (not all but some) are having trouble opening the
> folders, files and so on.  This was not the case few days ago, it started
> happening lately with amazing inconsistency.  Inconsistent in it works some
> times, it simply doesn't sometimes.
> 
>  
> 
> I have two samba servers in the setup one on Solaris-10 and the other on
> Solaris-9.   On Solaris 10 I'm using stock SUN Samba packages.  It would be
> real easy, if I could isolate the problem by limiting it to one, but it
> occurs on both the servers.  The samba versions are different on both
> servers.  Before any can suggest, I did shutdown one server and pointed all
> the users to remaining one.  No luck.  Shut down the other server,
> re-pointed the users, no luck.  I'm going nuts trying to isolate the
> problem, if only it wasn't happening with such astonishing inconsistency.
> 
>  
> 
> Trussing the smbd shows the user access is stuck in fcntl system calls like
> this, and these users do have all the proper permissions for messing with
> these files
> 
>  
> 
> Fcntl(10, F_SETLKW64, 0xFFBFF750) . (sleeping)
> 
> Fcntl (27,F_GETLKW64,0xFFBFF840)..(sleeping)
> 
>  
> 
> They never get out of this.  Tried the usual options of oplocks = no kernel
> oplocks = no and even faking oplocks in the smb.conf, I can't get out of
> this.  Anyone can suggest something I can muck with?  I know earlier Solaris
> versions had a kernel bug with fcntl and it was patched.  So, what else
> could be the issue here?  Thanks.

What filename is the smbd stuck on the lock in ?

Jeremy.