We have two file host nodes attached to our san for centralized storage. Every so often each of the hosts stop allowing connections to them and running service smbd restart then solves the problem. I keep seeing

Code:
[2013/05/17 11:10:50.124392,  1] smbd/server.c:300(remove_child_pid)
  Scheduled cleanup of brl and lock database after unclean shutdown
[2013/05/17 11:11:10.136658,  1] smbd/server.c:272(cleanup_timeout_fn)
  Cleaning up brl and lock database after unclean shutdown
[2013/05/17 11:12:41.738856,  3] smbd/server.c:292(remove_child_pid)
  smbd/server.c:292 Unclean shutdown of pid 16395
[2013/05/17 11:12:41.738978,  1] smbd/server.c:300(remove_child_pid)
  Scheduled cleanup of brl and lock database after unclean shutdown
[2013/05/17 11:13:01.739942,  1] smbd/server.c:272(cleanup_timeout_fn)
  Cleaning up brl and lock database after unclean shutdown
[2013/05/17 11:13:14.379085,  3] smbd/server.c:292(remove_child_pid)
  smbd/server.c:292 Unclean shutdown of pid 25344
[2013/05/17 11:13:14.379210,  1] smbd/server.c:300(remove_child_pid)
  Scheduled cleanup of brl and lock database after unclean shutdown
[2013/05/17 11:13:34.379794,  1] smbd/server.c:272(cleanup_timeout_fn)
  Cleaning up brl and lock database after unclean shutdown
[2013/05/17 11:13:49.131541,  3] smbd/server.c:292(remove_child_pid)
  smbd/server.c:292 Unclean shutdown of pid 25022
on each of the hosts.. could this be linked to our issue?

Code:
[global]
# System Settings
 workgroup = DOMAIN
 server string = %h server (Samba, Ubuntu)
 log file = /var/log/samba/log.%m
 log level = 3
 max log size = 1000000
 syslog = 1
 panic action = /usr/share/samba/panic-action %d
 deadtime = 10
 oplocks = yes
 kernel oplocks = yes

# Domain Options
 security = ads
 realm = DOMAIN.INTERNAL
 preferred master = no
 local master = no
 domain master = no
 encrypt passwords = yes
 dns proxy = no
 map to guest = Bad User

# SMBClient Options
 client ntlmv2 auth = yes

# Winbind Options
 idmap config DOMAIN: default = yes
 idmap config DOMAIN: backend = rid
 idmap config DOMAIN: range = 100000-500000000
 idmap config * : range   = 70000-500000000
 winbind separator = +
 winbind enum users = no
 winbind enum groups = no
 winbind use default domain = yes
 winbind nested groups = yes
 winbind refresh tickets = true
 winbind offline logon = true
 winbind reconnect delay = 1
 template homedir = /dev/null

# Unix Password Handling
 passdb backend = tdbsam
 obey pam restrictions = yes
 unix password sync = yes
 passwd program = /usr/bin/passwd %u
 passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
 pam password change = yes

# Printers
 load printers = no
 printing = cups
 printcap name = cups
 printcap cache time = 0

# Networking
 socket options = TCP_NODELAY IPTOS_LOWDELAY
 max xmit = 16644
 use sendfile = true
 getwd cache = yes
 disable netbios = yes
 smb ports = 445

# ACL Permissions
# store dos attributes, causes IE/Chrome Downloads not to automatically occur.
 nt acl support = yes
 inherit acls = yes
 map acl inherit = yes
 store dos attributes = yes
 map archive = yes
 map hidden = yes
 map read only = yes
 map system = yes
 inherit permissions = yes

# Default Share Parameters
# If a varible needs to be unset or changed, simply redefine it under the share.
 writeable      = yes
 browseable     = no
 available      = yes
 access based share enum = yes
 usershare allow guests = yes
 create mask     = 0774
 directory mask  = 0775
 admin users     = @"Domain Admins" root
 valid users     = @"Domain Users"
 hide files      = /*$RECYCLE.BIN/~$*/desktop.ini/
 veto files      = /*.cmd/*.exe/*.bat/*.java/desktop.ini/*.swf/*.msi/*.ani/

# Document Shares (/var/fshost/documents/)
[intake05]
 path           = /var/fshost/documents/intake05

[intake06]
 path           = /var/fshost/documents/intake06

[intake07]
 path           = /var/fshost/documents/intake07

[intake08]
 path           = /var/fshost/documents/intake08

[intake09]
 path           = /var/fshost/documents/intake09

[intake10]
 path           = /var/fshost/documents/intake10

[intake11]
 path           = /var/fshost/documents/intake11

[intake12]
 path           = /var/fshost/documents/intake12

[staff]
 path           = /var/fshost/documents/staff
 veto files     =

# Data Shares (/var/fshost/shares/)
[staffshare]
 path           = /var/fshost/shares/staffshare
 veto files     =

[studentshare]
 path           = /var/fshost/shares/studentshare
 veto files     =

[radioweald]
 path           = /var/fshost/shares/radioweald
 veto files     =

[musictech]
 path           = /var/fshost/shares/musictech
 veto files     =

[roaming]
 path           = /var/fshost/shares/roaming
 veto files     =

[profiles]
 path           = /home/marty/profiles
 veto files     =