[Samba] Intermittent process crash serving files

Tom Ronayne tom at airotech.com
Wed May 24 19:06:13 GMT 2006


(I may have posted this twice because I didn't understand the addressing 
- sorry in advance if that is the case. . . .)

We have been using SAMBA for file/print servers and domain controllers 
in Windows networks for several years.  At one site, we have 
intermittent problems in which the connection to the SAMBA server 
appears to die: i.e., no one can connect to the share, and the Windows 
clients (Terminal Servers and workstations) apparently keep re-trying to 
connect which ultimately locks up those clients.

They have about 20 or so users, mostly doing MS Office stuff, opening 
one very large MS Access database (around 400 Mb) and using a lot of 
Outlook PST files - some over 1 Gb each. All of this data, as well as 
their roaming profiles, is stored in the 'base' share listed in smb.conf.

We have noticed in many cases, but not all, that there is an error in 
/var/log/messages indicating that the samba process had an error and 
apparently the process exits.  I've included a sample from 
/var/log/messages.  In this case, we are using (2) Windows 2000 Terminal 
Servers, as well as one XP workstation.  The OS on the SAMBA server is: 
Mandrake (Linux version 2.6.3-7mdk-p3-smp-64GB 
(nplanel at n3.mandrakesoft.com) (gcc version 3.3.2 (Mandrake Linux 10.0 
3.3.2-6mdk)) #1 SMP Wed Mar 17 15:34:39 CET 2004), and the SAMBA version 
is: 3.0.2a.  We also had the same problem using Fedora (Linux version 
2.6.9-1.667smp (bhcompile at dolly.build.redhat.com) (gcc version 3.4.2 
20041017 (Red Hat 3.4.2-6.fc3)) #1 SMP Tue Nov 2 15:09:11 EST 2004) with 
SAMBA 3.0.8pre1-0.pre1.3.

Here is a copy of our smb.conf:
#=============================== Global Settings =========================
[global]
    create mask=777
    force create mode=777
    directory mask=777
    add user script = /usr/sbin/addnewuser.sh %u

    #addsharecommand           = /usr/sbin/smbexecutechangeshare.sh
    #deletesharecommand        = /usr/sbin/smbexecutechangeshare.sh

    workgroup = NP
    netbios name = NETPUB_LINUX06
    server string = NETPUB Linux File Server 06
    local master = no
    domain master = no
    preferred master = no

    log level = 3
    log file = /var/log/samba/log.%m
    max log size = 500

    security = domain
    password server = *
    encrypt passwords = yes
    smb passwd file = /etc/samba/smbpasswd
    socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
    dns proxy = no
    #profile acls = yes
    remote announce = 192.168.0.255
    #wins server = 192.168.0.253
    username level = 100
    password level = 100
    interfaces = eth2 192.168.0.1 lo

    smb ports = 139

    oplocks = no
    level2 oplocks = no

#============================ Share Definitions 
==============================
#[homes]
#   path = /home/
#   comment = Home Directories
#   browseable = yes
#   public = yes
#   writable = yes
[public]
   path = /public
   browseable = yes
   public = yes
   writable = yes
   read only = no
   guest OK = yes
   profile acls = yes

[base]
   path = /base
   browseable = yes
   public = yes
   writable = yes
   read only = no
   guest OK = yes
   profile acls = yes
   csc policy = disable
   oplocks = no
   level2 oplocks = no

[usershare]
   path = /base/USERS/%u
   browseable = yes
   public = yes
   writable = yes
   read only = no
   guest OK = yes
   profile acls = yes

    ;This next setting stands for /client-side caching policy/, and 
specifies how
    ; clients capable of offline caching will cache the files in the
    ; share. The valid values are: manual, documents, programs, disable.
    ; These values correspond to those used on Windows servers.
    ; For example, shares containing roaming profiles can have offline
    ; caching disabled using *csc policy = disable*.
    ; Default: //csc policy/ = manual /
    ; Example: //csc policy/ = programs /
    csc policy = disable


Here is a sample of /var/log/messages from just before one of the 
'disconnect times':

May 24 10:57:54 localhost smbd[1723]: [2006/05/24 10:57:54, 0] 
libsmb/clitrans.c:cli_receive_trans(190)
May 24 10:57:54 localhost smbd[1723]:   Expected SMBtrans response, got 
command 0x00
May 24 10:57:54 localhost smbd[1723]: [2006/05/24 10:57:54, 0] 
rpc_client/cli_pipe.c:cli_nt_session_open(1454)
May 24 10:57:54 localhost smbd[1723]:   cli_nt_session_open: pipe hnd 
state failed.  Error was SUCCESS - 0
May 24 10:58:39 localhost smbd[1723]: [2006/05/24 10:58:39, 0] 
lib/fault.c:fault_report(36)
May 24 10:58:39 localhost smbd[1723]: 
===============================================================
May 24 10:58:39 localhost smbd[1723]: [2006/05/24 10:58:39, 0] 
lib/fault.c:fault_report(37)
May 24 10:58:39 localhost smbd[1723]:   INTERNAL ERROR: Signal 11 in pid 
1723 (3.0.2a)
May 24 10:58:39 localhost smbd[1723]:   Please read the appendix Bugs of 
the Samba HOWTO collection
May 24 10:58:39 localhost smbd[1723]: [2006/05/24 10:58:39, 0] 
lib/fault.c:fault_report(39)
May 24 10:58:39 localhost smbd[1723]: 
===============================================================
May 24 10:58:39 localhost smbd[1723]: [2006/05/24 10:58:39, 0] 
lib/util.c:smb_panic(1400)
May 24 10:58:39 localhost smbd[1723]:   PANIC: internal error
May 24 10:58:39 localhost smbd[1723]: [2006/05/24 10:58:39, 0] 
lib/util.c:smb_panic(1408)
May 24 10:58:39 localhost smbd[1723]:   BACKTRACE: 4 stack frames:
May 24 10:58:39 localhost smbd[1723]:    #0 smbd(smb_panic+0x1ab) 
[0x81bc238]
May 24 10:58:39 localhost smbd[1723]:    #1 smbd [0x81aacfd]
May 24 10:58:39 localhost smbd[1723]:    #2 smbd [0x81aad72]
May 24 10:58:39 localhost smbd[1723]:    #3 /lib/tls/libc.so.6 [0x40306718]
May 24 10:58:39 localhost smbd[1723]:
May 24 10:58:39 localhost smbd[7879]: [2006/05/24 10:58:39, 0] 
auth/auth_domain.c:domain_client_validate(204)
May 24 10:58:39 localhost smbd[7879]:   domain_client_validate: unable 
to validate password for user kcr in domain NP

to Domain controller \\NETPUB_LINUX09. Error was NT_STATUS_WRONG_PASSWORD.
May 24 10:58:39 localhost smbd[7879]: [2006/05/24 10:58:39, 0] 
auth/auth_domain.c:domain_client_validate(204)
May 24 10:58:39 localhost smbd[7879]:   domain_client_validate: unable 
to validate password for user spl in domain NP

to Domain controller \\NETPUB_LINUX09. Error was NT_STATUS_WRONG_PASSWORD.
May 24 10:58:39 localhost smbd[7879]: [2006/05/24 10:58:39, 0] 
auth/auth_domain.c:domain_client_validate(204)
May 24 10:58:39 localhost smbd[7879]:   domain_client_validate: unable 
to validate password for user mcr in domain NP

to Domain controller \\NETPUB_LINUX09. Error was NT_STATUS_WRONG_PASSWORD.

**************
Thanks in advance for your help
Tom Ronayne
AIRO Tech OMD, Inc.
tom at airotech.com



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