I've been using Samba for a number of years and suddenly Samba started throwing oplock errors and I simply can't figure out why. I've not changed any config parameters in some time, but have updated my version of samba as new packages become available for my distro. I'm running Centos 5.9 and the following versions of samba from stock Centos: samba3x-common-3.6.6-0.129.el5 samba3x-winbind-3.6.6-0.129.el5 samba3x-client-3.6.6-0.129.el5 samba3x-3.6.6-0.129.el5 Suddenly, over the last 2 weeks or so, I started to get the following types of oplock errors: Mar 11 08:57:38 fileserver smbd[22536]: [2013/03/11 08:57:38.925861, 0] smbd/oplock_linux.c:104(linux_oplock_signal_handler) Mar 11 08:57:38 fileserver smbd[22536]: linux_oplock_signal_handler: failed to find fsp for file fd=51 (file was closed ?) Mar 11 08:57:49 fileserver smbd[22536]: [2013/03/11 08:57:49.685736, 0] smbd/oplock_linux.c:158(linux_release_kernel_oplock) Mar 11 08:57:49 fileserver smbd[22536]: linux_release_kernel_oplock: Error when removing kernel oplock on file Bids and Proposals/2011/11-Nov/someproject/sol/Project White Paper - 2.1.docx, file_id = fd05:70045:0, gen_id = 3041820832. Error was Bad file descriptor My samba machine is setup as as a domain member of a legacy (win nt 4) type domain against a another Samba server that is running authentication. I have the following oplock options set is my smb.conf file: oplocks = true kernel oplocks = true level2 oplocks = true and the share is setup with the following config: [management] comment = Management Drive path = /home/files/dir/management/files read only = no writable = yes force group = shared printable = no inherit permissions = yes create mode = 0660 Any suggestions would be much appreciated. Greg