Samba problem - 2.0.6 on SCO OS 5.0.5

[Simo Sorce]

I feel like you hit the maximum number of files open and something else
got also broken when samba was not able to open more files.
If you have many users check the number of files samba is able to open,
normally samba ask for 10000 files, but many OS sets 1024 per
process/user by default.
set them with ulimit!

On Thu, 7 Dec 2000, Rick Day wrote:

> Hi all,
>
> Hopefully someone can help me with a Samba problem I had yesterday.
> Unfortunately, the logs were filled by this problem, so any from the start
> of the problem were overwritten.  If anyone has seen the following problem
> before, or can help with further diagnosis, it would be much appreciated.
> I'm not even sure if Samba was the culprit, or just a symptom.
>
> We are running Samba 2.0.6 on SCO Unix OS 5.0.5.
>
> Yesterday, all mapped drive connections (ie samba connections) stopped
> working. We could see the share, and files in the share via Explorer (Win9x
> and WinNT4 workstations), but if we tried to open a file, we got "file not
> found".  Telnet sessions were not affected.  No other access to any other
> server was affected (as far as I know).
>
> On the SCO server, I noticed that a some of the users had multiple smbd
> processes started, I did not count how many, but some of the affected users
> had up to 4 to 5 pages of a "ps -ef" each.   A "smbstatus" showed similar
> numbers.  The first part of "smbstatus" showed over 100 processes, normally
> we run 20-30 smb processes.  At this point I stopped and started Samba.
> This seemed to fix the problem.   However, we found that a number of data
> files, that were being accessed at the time, had many lines of what looks to
> be smb log records inserted into them.  Some of these files were 400-500Mb
> larger than they normally were.  We had to restore from the previous nights
> backup.
>
> I have since increased the "max log size" incase the problem happens again,
> hopefully I can then get some messages from the start of the problem.
>
> So some log records.
>
> "log.smb"  had the following two records repeated many times.  So many had
> been written that any records from the start of the problem were over
> written.
>
> [2000/12/06 13:51:53, 0] lib/util_sock.c:open_socket_in(836)
>   socket failed
> [2000/12/06 13:51:53, 0] smbd/oplock.c:open_oplock_ipc(93)
>   open_oplock_ipc: Failed to get local UDP socket for address 100007f. Error
> was Out of stream resources
>
>
> "log.brooke"  where 'brooke' is the netbios name of the computer that was
> been used by a user with a lot of processes.  The following group of
> messages were repeated so many times that the log was filled.
>
> The first two lines were repeated for each of the servers in the "password
> server" option in smb.conf
>
> [2000/12/05 13:52:11, 0] lib/util_sock.c:open_socket_in(836)
>   socket failed
> [2000/12/05 13:52:11, 1]
> smbd/password.c:connect_to_domain_password_server(1139)
>   connect_to_domain_password_server: Can't resolve address for CCSYDFS2
>
> [2000/12/05 13:52:11, 0] smbd/password.c:domain_client_validate(1392)
>   domain_client_validate: Domain password server not available.
> [2000/12/05 13:52:11, 0] passdb/smbpass.c:startsmbfilepwent(50)
>   startsmbfilepwent: unable to open file /usr/local/samba/private/smbpasswd
> [2000/12/05 13:52:11, 0] passdb/passdb.c:iterate_getsmbpwnam(149)
>   unable to open smb password database.
> [2000/12/05 13:52:11, 1] smbd/password.c:pass_check_smb(505)
>   Couldn't find user 'roser1' in smb_passwd file.
> [2000/12/05 13:52:11, 1] smbd/reply.c:reply_sesssetup_and_X(909)
>   Rejecting user 'roser1': authentication failed
>
>
> The lines inserted into the data files seemed to be the following message
> repeated many times.  This message also appeared in some "log.nbname" files
> for people who did not have multiple processes.
>
> [2000/12/05 13:47:36, 0] smbd/oplock.c:request_oplock_break(1202)
>   request_oplock_break: no response received to oplock break request to pid
> 3117
>  on port 4636 for dev = 168, inode = 1061
>   for dev = 168, inode = 1061, tv_sec = 3a2c4908, tv_usec = d1f60
>
>
> My smb.conf is as follows:
>
> #======================= Global Settings
> =====================================
> [global]
>    workgroup = TWA
>    server string = CBA Live Server
>    log file = /usr/local/samba/log/log.%m
>    max log size = 50
>    security = DOMAIN
>    password server = CCSYDFS2, CCSYDFS1, CCSYDMS1, CCMELFS2, CCBRIFS2,
> CCROCFS2
>    encrypt passwords = yes
>    smb passwd file = /usr/local/samba/private/smbpasswd
>    socket options = TCP_NODELAY
>    local master = No
>    dns proxy = no
>    default case = lower
>    case sensitive = No
>    preserve case = Yes
>    short preserve case = No
>    deadtime = 15
>    oplocks = Yes
>    veto oplock files = /intran2.*/
> #============================ Share Definitions
> ==============================
> [homes]
>    comment = Home Directories
>    browseable = no
>    writable = yes
>
> [u]
>    comment = Dataflex Application Share - oplocks off
>    path = /u
>    writable = yes
>    printable = no
>    create mode = 666
>    force create mode = 666
>    directory mask = 2777
>    force directory mode = 2777
>    oplocks = no
>
> [vol]
>    comment = CBA Data share
>    path = /u/vol
>    writable = yes
>    printable = no
>    create mode = 666
>    directory mask = 2777
>    force directory mode = 2777
>
>

-- 
Simo Sorce - Integrazione Sistemi Unix/Windows - Politecnico di Milano
E-mail: simo.sorce at polimi.it
Tel.int: 02 2399 2425 - Fax.int. 02 2399 2451
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