[Samba] specified network path no longer available

[Ben Chitambira]

I am having the "network path no longer available" issue and below is the log for the XP client concerned. This happens when copying a file from XP to the samba share. This is Centos 5, Sofs 1.5.2. with 3 nodes serving smb,nfs and ftp. domain controller is a separate linux samba pdc. auth is ldap. SO_RCVBUF and SO_SNDBUF both are 8192 with TCP_NODELAY.

First technical consience tells me to set
       smb ports = 445
But the write_data failures are baffling.
I am also considering increasing SO_RCVBUF and SNDBUFF

How best can I address this? I believe I have the most recent/up to date software. This is affecting my users in production, so severity is critical.
Thanks for help in advance.

/var/log/samba/computer1.log
[2009/02/05 12:05:29,  0] modules/vfs_tsmsm.c:tsmsm_is_offline(209)
  Stale DMAPI session, re-creating it.
[2009/02/05 12:05:30,  1] smbd/service.c:close_cnum(1405)
  ls20094 (::ffff:10.31.6.30) closed connection to service share1
[2009/02/05 12:05:32,  1] smbd/service.c:make_connection_snum(1194)
  ls20094 (::ffff:10.31.6.30) connect to service lmf initially as user bchitambira (uid=9426, gid=1010) (pid 31919)
[2009/02/05 12:05:32,  1] smbd/service.c:close_cnum(1405)
  ls20094 (::ffff:10.31.6.30) closed connection to service share1
[2009/02/05 12:23:53,  0] lib/util_sock.c:write_data(1136)
[2009/02/05 12:23:53,  0] lib/util_sock.c:get_peer_addr_internal(1676)
  getpeername failed. Error was Transport endpoint is not connected
  write_data: write failure in writing to client 0.0.0.0. Error Connection reset by peer
[2009/02/05 12:23:53,  0] smbd/process.c:srv_send_smb(74)
  Error writing 4 bytes to client. -1. (Transport endpoint is not connected)
[2009/02/05 12:24:04,  0] lib/util_sock.c:write_data(1136)
[2009/02/05 12:24:04,  0] lib/util_sock.c:get_peer_addr_internal(1676)
  getpeername failed. Error was Transport endpoint is not connected
  write_data: write failure in writing to client 0.0.0.0. Error Connection reset by peer
[2009/02/05 12:24:04,  0] smbd/process.c:srv_send_smb(74)
  Error writing 4 bytes to client. -1. (Transport endpoint is not connected)

Benny Chitambira
*nixAdmin