[Samba] Exclusive oplock left by process

[xiaoqin_qiu at agilent.com]

Hi all,

We have a HP-UX 11i server running as a samba server. Users use Windows 2000 boxes with Service Pack 4 to connect to the samba server. Several days ago, we upgraded samba server from 2.0.7 to 3.0.5, and we started to experience the following problem:

The general connection and access to the samba server is ok. However, under the samba share there have been some directories mounted from some other HP-UX 11i servers through WAN. When people try to copy files from these directories or running some applications using files under these directories, the windows explorer/application kind of hang and became very slow. But this type of tasks were successful using samba version 2.0.7. The problem only happened after the upgrade.

I looked at the samba log file and found the following errors:

[2004/08/24 18:07:51, 0] smbd/oplock.c:request_oplock_break(1023)
  request_oplock_break: no response received to oplock break request to pid 27458 on port 54926 for dev = 430016a8, inode = 3310429, file_id = 24
[2004/08/24 18:07:51, 0] smbd/open.c:open_mode_check(680)
  open_mode_check: exlusive oplock left by process 27458 after break ! For file hped/sr/osclib_encode_def.atf, dev = 430016a8, inode = 3310429. Deleting it to continue...
[2004/08/24 18:07:51, 0] smbd/open.c:open_mode_check(684)
  open_mode_check: Existent process 27458 left active oplock.

Our WAN connection is pretty fast although it is a lot slower than LAN. And in the meantime, we had no problem accessing these directories using NFS.

I read man pages and search the internet. Although there are sevel posts on the internet describing similar problem, I havn't found any solution. >From the man page, parameter "oplock break wait time" caught my eyes. We have been using default value for both 2.0.7 and 3.0.5. However, the default value for this parameter seems getting changed from "10" to "0" (if that was not a typo). And we use default values for all oplock related parameters.

Can I change this paramter to 10? The man page kind of made me be afraid of change this value. Will this help? And any suggestion about our problem?

Thank you very much for your help!

Xiaoqin Qiu
IT Infrastructure Services Organization
Agilent Technologies, Inc.
xiaoqin_qiu at agilent.com