[Samba] unknown UDP message

[Jonathan DEL CAMPO /jdc/ .Y]

Hi, 
I have some serious problem with my Samba server in production environment.
For information, I am running a samba 3.0.10-1.4E.2 under a kernel Linux
version 2.6.9-22 with a RHEL 3.4.4-2.

The problem is that I noticed in the log files the following errors :

smbd[25842]: [2006/06/14 11:25:07, 0]
smbd/oplock.c:request_oplock_break(1055)
smbd[25842]:   request_oplock_break: no response received to oplock break
request to pid 25225 on port 33355 for dev = 16, inode =
4720682, file_id = 2

Next ... 3 hours later another error appear :

smbd[25842]:   process_local_message: unknown UDP message command code
(8003) - ignoring.
smbd[25842]: [2006/06/14 15:00:40, 0]
smbd/oplock.c:process_local_message(441)

And this last one occured  more than 200 times per seconds during 4
seconds and pull the CPU  to 100 percent, with a smbd process at 99% :

25842 nobody    25   0 12864 3740 3112 R 99.7  0.1  10053:47 smbd

By the way, since this time samba connections seems anormaly slow ...

So does anyone know something about this problem ? Is there a way to avoid
this ?

thanks