[Samba] STATUS_INVALID_LOCK_SEQUENCE when writing to a file....

Brian Cowan brcowan at earthlink.net
Thu Nov 16 01:47:15 GMT 2006

Hi All,

Have any of you seen this little darling of an error on writing to a 
file? The sequence of events goes something like this:
1) File is opened for reading on a Samba server with oplocks disabled. 
Open request is requesting a batch oplock.
2) File open SUCCEEDS. (Should this have happened?)
3) File is read, stat'd etc. over and over.
4) A request comes through to write to the file.

I think that the client had an odd interpretation of what a batch oplock 
let it get away with. There is also a filter driver in the way that does 
odd things (ClearCase MVFS), and this could be related, but the odd 
thing is that the error ONLY happens when accessing [ClearCase Views on] 
Samba shares. I'm thinking that the client thought it could do anything 
it wanted since it thought it had a batch oplock.

My question is, shouldn't the samba server "bounce" an open request that 
includes a request for a Batch Oplock (or any oplock at all, for that 

Yes, I have a network trace that shows the problem, but I can't exactly 
sent it out since it contains proprietary information.


Brian Cowan

Samba information:
Samba version:  2.2.8a.

smb.conf file from View server appserv2:
# Samba config file created using

# Global parameters
         netbios name = appserv2
         netbios aliases = appserv2
         interfaces =
        include = /usr/local/ct/samba/smb.conf

         comment = Samba Testing Filesystem
         path = /smb-test
         read only = No
        valid users = dowens pgraves tooladm bpepin

        comment = MVFS View Storage Container
        path = /view
        read only = Yes

        comment = ERM View Storage Container
        path = /vstore1
        read only = No

-- smb.conf file included by the above server
# Samba config file created using

# Global parameters
         workgroup = ENG
         security = domain
         encrypt passwords = yes
         password server = svr1
         username map = /usr/local/ct/samba/username.map
         password level = 4
         log level = 1
         log file = /opt/local/samba/log/%m.%a
         max log size = 20
         name resolve order = hosts wins bcast lmhosts
         deadtime = 60
         max open files = 8192
         socket options = TCP_NODELAY IPTOS_LOWDELAY
         load printers = No
         os level = 40
         preferred master = Yes
         wins server =
         kernel oplocks = No
         message command = /bin/mail -s 'message from #% on %m' bpepin 
<%s; rm %s
         homedir map = auto.xxx
         comment = Samba ver. %v
         invalid users = @wheel, mail, deamon, adt
         create mask = 0775
         directory mask = 0775
         oplocks = No
        level2 oplocks = No
        case sensitive = No
        preserve case = Yes

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