[Samba] Strange samba error

[Mark Frasa]

Hello,

We use samba to backup some (rather large) sql databases.

Lately we ocasionally are getting fail reports, as in the file could not
be written, and windows generating an error 64:

"The specified network name is no longer available"

While going trough the logs, i can see the following error (sorry for
the long output):

-----
[2008/05/19 01:14:46, 0] lib/util_sock.c:write_data(562)
  write_data: write failure in writing to client x.x.x.x. Error Broken
pipe
[2008/05/19 01:14:46, 0] lib/util_sock.c:send_smb(769)
  Error writing 39 bytes to client. -1. (Broken pipe)
[2008/05/19 01:14:46, 1] smbd/service.c:close_cnum(1150)
  xxxxx (x.x.x.x) closed connection to service xxxxx
[2008/05/19 01:16:25, 0] lib/util_sock.c:write_data(562)
  write_data: write failure in writing to client x.x.x.x. Error Broken
pipe
[2008/05/19 01:16:25, 0] lib/util_sock.c:send_smb(769)
  Error writing 62 bytes to client. -1. (Broken pipe)
[2008/05/19 01:16:25, 1] smbd/service.c:close_cnum(1150)
  xxxxx (x.x.x.x) closed connection to service xxxxx
[2008/05/19 01:16:25, 0] smbd/server.c:exit_server_common(657)
  ===============================================================
[2008/05/19 01:16:25, 0] smbd/server.c:exit_server_common(659)
  Abnormal server exit: send_trans2_replies: send_smb failed.
[2008/05/19 01:16:25, 0] smbd/server.c:exit_server_common(660)
  ===============================================================
[2008/05/19 01:16:25, 0] lib/util.c:log_stack_trace(1706)
  BACKTRACE: 11 stack frames:
   #0 /usr/sbin/smbd(log_stack_trace+0x23) [0x822c373]
   #1 /usr/sbin/smbd [0x82c2265]
   #2 /usr/sbin/smbd [0x82c2413]
   #3 /usr/sbin/smbd [0x80c39c8]
   #4 /usr/sbin/smbd(handle_trans2+0x2453) [0x80cd623]
   #5 /usr/sbin/smbd(reply_trans2+0x64c) [0x80d112c]
   #6 /usr/sbin/smbd [0x80ea674]
   #7 /usr/sbin/smbd(smbd_process+0x6f8) [0x80eb838]
   #8 /usr/sbin/smbd(main+0x10df) [0x82c380f]
   #9 /lib/tls/libc.so.6(__libc_start_main+0xc8) [0xb7c38ea8]
   #10 /usr/sbin/smbd [0x8082b11]
[2008/05/19 01:16:25, 0] smbd/server.c:exit_server_common(664)
  Last message was SMBtrans2
[2008/05/19 01:16:25, 5] lib/util.c:show_msg(485)
[2008/05/19 01:16:25, 5] lib/util.c:show_msg(495)
  size=84
  smb_com=0x32
  smb_rcls=0
  smb_reh=0
  smb_err=0
  smb_flg=24
  smb_flg2=55303
  smb_tid=1
  smb_pid=5320
  smb_uid=0
  smb_mid=26752
  smt_wct=15
  smb_vwv[ 0]=    6 (0x6)
  smb_vwv[ 1]=    8 (0x8)
  smb_vwv[ 2]=    2 (0x2)
  smb_vwv[ 3]=    0 (0x0)
  smb_vwv[ 4]=    0 (0x0)
  smb_vwv[ 5]=    0 (0x0)
  smb_vwv[ 6]=    0 (0x0)
  smb_vwv[ 7]=    0 (0x0)
  smb_vwv[ 8]=    0 (0x0)
  smb_vwv[ 9]=    6 (0x6)
  smb_vwv[10]=   68 (0x44)
  smb_vwv[11]=    8 (0x8)
  smb_vwv[12]=   76 (0x4C)
  smb_vwv[13]=    1 (0x1)
  smb_vwv[14]=    8 (0x8)
  smb_bcc=19
[2008/05/19 01:16:25, 10] lib/util.c:dump_data(2222)
  [000] 00 00 00 11 14 FC 03 00  00 00 00 00 06 00 00
00  ........ ........
  [010] 00 00 00                                          ... 
[2008/05/19 01:16:25, 0] lib/fault.c:dump_core(173)
  dumping core in /var/log/samba/cores/smbd
-----

Here i see dumping core in /var/log/samba/cores/smbd, but i don't see it
there at all.

Apart from that, can anyone give me an indication of what is going on
here, and why it is exiting?

Here are some system components:

Kernel:	2.6.20.3
OS:	Debian (etch)
Samba:	3.0.24-6etch8

Proc:	Intel(R) Xeon(R) CPU 5110  @ 1.60GHz
Mem:	2071640kB
Disk:	5x 500G (RAID5)
Raid:	LSI Logic SAS based MegaRAID driver


Thanks alot for looking into this.


Cheers,
Mark.