[Samba] OS X Hang Issue

[Ben Blakely]

Hello List,
  I have a bit of a strange problem with an OS 10.3.3 XServe (Samba 
3.0.2) that I've inherited from a previous sysadmin ;).  It's a bit hard 
to describe but I'll do my best and include applicable log files and the 
smb.conf.

Ok, first of all this machine is bound to our Active Directory domain 
and authenticates users there (security = ads).  It uses the Windows 
2000 DC as a DNS server as well (both forward and reverse zones exist 
and are complete).  When browsing this machine from another box on the 
domain, browsing is somewhat slow to respond and right clicking on a 
file locks up the explorer for a varying amount of time before showing 
the operations menu.  When opening a file (assuming you can do so 
through the browsing delays), everything seems to work all right unless 
it is an abnormally large file (in which case it locks the client 
machine, in some cases enough to require a hard reboot with the power 
switch).  The only consistency in this whole mess is that when saving 
files of _any_ size, the program the file is opened with locks and 
eventually bombs with a "Delayed Write Failed" error after anywhere from 
45 seconds to 60 minutes.  The data that has been changed is not saved.  
Another oddity is that a machine that is _not_ on the domain has no 
problems whatsoever.  The problem exists for all users and all client 
machines on the domain.  The following lines appear in the server's 
client log file (log./machinename/):

==================================
[2004/08/02 14:37:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:get_peer_addr(968)
  getpeername failed. Error was Socket is not connected
[2004/08/02 14:37:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:write_socket_data(404)
  write_socket_data: write failure. Error = Broken pipe
[2004/08/02 14:37:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:write_socket(429)
  write_socket: Error writing 4 bytes to socket 17: ERRNO = Broken pipe
[2004/08/02 14:37:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:send_smb(621)
  Error writing 4 bytes to client. -1. (Broken pipe)
[2004/08/02 14:47:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:get_peer_addr(968)
  getpeername failed. Error was Socket is not connected
[2004/08/02 14:47:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:write_socket_data(404)
  write_socket_data: write failure. Error = Broken pipe
[2004/08/02 14:47:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:write_socket(429)
  write_socket: Error writing 4 bytes to socket 6: ERRNO = Broken pipe
[2004/08/02 14:47:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:send_smb(621)
  Error writing 4 bytes to client. -1. (Broken pipe)
==================================

log./machineIP /is blank.

In log.smbd we have:

==================================
[2004/08/02 14:37:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:set_socket_options(160)
[2004/08/02 14:37:48, 0] 
/SourceCache/samba/samba-56/samba/source/lib/util_sock.c:get_peer_addr(968)
==================================

Which makes sense and corresponds to the errors in the machine log.  The 
file log.nmbd contains nothing.

Below is the server's smb.conf:

==================================
[global]
        workgroup = KRELLINST
        display charset = UTF-8-MAC
        print command = /usr/sbin/PrintServiceAccess printps %p %s
        lprm command = /usr/sbin/PrintServiceAccess remove %p %j
        security = ads
        name resolve order = host wins bcast
        log file = /private/var/log/samba/log.%m
        guest account = unknown
        encrypt passwords = yes
        printing = BSD
        allow trusted domains = no
        preferred master = no
        lppause command = /usr/sbin/PrintServiceAccess hold %p %j
        netbios name = harbor
        wins support = no
        max smbd processes = 0
        printcap =
        client plaintext auth = no
        server string = Mac OS X
        lpresume command = /usr/sbin/PrintServiceAccess release %p %j
        client ntlmv2 auth = yes
        lpq command = /usr/sbin/PrintServiceAccess jobs %p
        passdb backend = opendirectorysam guest
        dos charset = CP437
        realm = krellinst.org
        unix charset = UTF-8-MAC
        socket options = TCP_NODELAY
        auth methods = guest opendirectory
        local master = no
        use spnego = yes
        domain master = no
        map to guest = Never
        printer admin = @admin, @staff, unknown
        log level = 0

[homes]
        comment = User Home Directories
        path = /Users/%U
        root preexec = /usr/sbin/inituser %U
        read only = no
        browseable = no
[Home]
        comment = Home Directories
        inherit permissions = no
        path = /Users
        security mask = 0700
        directory mask = 0700
        map archive = no
        read only = no
        create mask = 0700
[Common]
        comment = Shared Files
        path = /Common
        security mask = 0777
        directory mask = 0777
        read only = no
        create mask = 0777
==================================

Any help anyone can provide would be greatly appreciated.  Thanks in 
advance!

/ben Blakely
blakely at krellinst.org
The Krell Institute