request_oplock_break message in log files

[Sarabjit Singh]

we are running Samba 2.0.6 on a solaris 7 (intel) box. Users (about 270 at one time) connect to the home directories located on the samba server by NT 4 workstations . Problem is  ..Some times they lose access suddenly .In the log files the following message appears
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[2000/08/22 08:28:09, 0] smbd/oplock.c:request_oplock_break(1202)
  request_oplock_break: no response received to oplock break request to pid 2077
2 on port 54910 for dev = 19801c3, inode = 4582438
  for dev = 19801c3, inode = 4582438, tv_sec = 39a14793, tv_usec = 5e40c
[2000/08/22 08:28:10, 0] smbd/oplock.c:request_oplock_break(1202)
  request_oplock_break: no response received to oplock break request to pid 2027
6 on port 54772 for dev = 19801c3, inode = 4582429
  for dev = 19801c3, inode = 4582429, tv_sec = 39a14750, tv_usec = 44800
[2000/08/22 08:28:13, 0] smbd/oplock.c:request_oplock_break(1202)

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this messages repeats after few seconds and the log files grows bigger  till the process is killed somehow and the server is rebooted. another interesting thing is that one user shows multiple process for smbd  connection if we try to isolate the user's connection. 
Can somebody please let us know where the problem could be.

Many Thanks

Sarabjit
singhs at cbs.curtin.edu.au 

Curtin University of Technology