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Benoit Gauthier

2005-Oct-10 18:31 UTC

[Samba] Samba creating multiple isntances of the deamon

(2005.10.10, 14:25)

I am running Samba 3.0.14a-2 on Fedora 4. I have no problem seeing the
Linux file system from any of the Windows (2000, SP4) computers
attached to the network.

The problem is that smbd processes are created for no apparent reason
and never die. I noticed this when the computer had been up for about
three days and there were some 600 active smbd processes!

What could be the cause of this behaviour? More importantly, what is
the solution? Clearly, this is not normal behaviour!

Thanks in advance for your help.


Beno?t

=======================================================
Beno?t Gauthier, mailto:gauthier@circum.com
R?seau Circum inc. / Circum Network Inc.

Nouvelles/News http://circum.com

74, rue du Val-Perch?, Gatineau, Qu?bec (Canada) J8Z 2A6
+1 819.770.2423  t?lec. fax: +1 819.770.5196

=======================================================
http://c2005.evaluationcanada.ca/
http://evaluationcanada.ca/
http://simulation.evaluationcanada.ca/

Gerald (Jerry) Carter

2005-Oct-13 13:39 UTC

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[Samba] Samba creating multiple isntances of the deamon

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Benoit Gauthier wrote:
| (2005.10.10, 14:25)
|
| I am running Samba 3.0.14a-2 on Fedora 4. I have
| no problem seeing the Linux file system from
| any of the Windows (2000, SP4) computers attached
| to the network.
|
| The problem is that smbd processes are created for
| no apparent reason and never die. I noticed this when
| the computer had been up for about three days
| and there were some 600 active smbd processes!
|
| What could be the cause of this behaviour? More
| importantly, what is the solution? Clearly, this is
| not normal behaviour!

You going to need to attach with gdb or run strace to
figure out what the smbd processes are doing.
Will one of the long lived processes respond to
kill -TERM ?

You might also want to run netstat to find the IP addresses
associated with the smbd processes.





cheers, jerry
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Benoit Gauthier

2005-Oct-13 19:52 UTC

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[Samba] Samba creating multiple isntances of the deamon

(2005.10.13, 15:50)

Here is the netstat output for SMB. What does it tell you?

tcp        0      0 0.0.0.0:139                 0.0.0.0:*                  
LISTEN      0          7150985    8709/smbd
tcp        0      0 0.0.0.0:445                 0.0.0.0:*                  
LISTEN      0          7150984    8709/smbd
tcp      281      0 192.168.0.99:139            192.168.0.199:1531         
CLOSE_WAIT  0          7115860    7758/smbd
tcp        0      0 192.168.0.99:139            192.168.0.199:1552         
ESTABLISHED 0          7172137    9237/smbd
tcp       54      0 192.168.0.99:139            192.168.0.199:1546         
CLOSE_WAIT  0          7153205    8737/smbd
tcp        1      0 192.168.0.99:139            192.168.0.199:1550         
CLOSE_WAIT  0          7171470    9214/smbd
tcp        0      0 192.168.0.99:139            192.168.0.196:1346         
ESTABLISHED 0          7171578    9222/smbd
tcp        1      0 192.168.0.99:139            192.168.0.199:1540         
CLOSE_WAIT  0          7134524    8211/smbd
udp        0      0 127.0.0.1:39332             0.0.0.0:*                       
0          7115861    7758/smbd
udp        0      0 127.0.0.1:39336             0.0.0.0:*                       
0          7134525    8211/smbd
udp        0      0 127.0.0.1:39343             0.0.0.0:*                       
0          7153206    8737/smbd
udp        0      0 127.0.0.1:39350             0.0.0.0:*                       
0          7171471    9214/smbd
udp        0      0 127.0.0.1:39351             0.0.0.0:*                       
0          7171579    9222/smbd
udp        0      0 127.0.0.1:39352             0.0.0.0:*                       
0          7172138    9237/smbd


Beno?t


> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> Benoit Gauthier wrote:
> | (2005.10.10, 14:25)
> |
> | I am running Samba 3.0.14a-2 on Fedora 4. I have
> | no problem seeing the Linux file system from
> | any of the Windows (2000, SP4) computers attached
> | to the network.
> |
> | The problem is that smbd processes are created for
> | no apparent reason and never die. I noticed this when
> | the computer had been up for about three days
> | and there were some 600 active smbd processes!
> |
> | What could be the cause of this behaviour? More
> | importantly, what is the solution? Clearly, this is
> | not normal behaviour!
> You going to need to attach with gdb or run strace to
> figure out what the smbd processes are doing.
> Will one of the long lived processes respond to
> kill -TERM ?
> You might also want to run netstat to find the IP addresses
> associated with the smbd processes.



> cheers, jerry
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.0 (GNU/Linux)
> Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
> iD8DBQFDTmOiIR7qMdg1EfYRAnORAKDib+Uk8MA/l4rA7xy1CQQw9ZmlmgCghG8m
> IQQkSXSK8FJC0K65CvDYuh8> =AuAy
> -----END PGP SIGNATURE-----

Gerald (Jerry) Carter

2005-Oct-13 23:37 UTC

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[Samba] Samba creating multiple isntances of the deamon

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Benoit Gauthier wrote:
| (2005.10.13, 15:50)
|
| Here is the netstat output for SMB. What does it tell you?

CLOSE_WAIT means that the process is waiting for a socket to
shutdown. I think you have a client connecting and
disconnecting rapidly.  Network browsing perhaps?

What is the client at 192.168.0.199?




ciao, jerry
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Benoit Gauthier

2005-Oct-14 00:37 UTC

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[Samba] Samba creating multiple isntances of the deamon

(2005.10.13, 20:32)
> CLOSE_WAIT means that the process is waiting for a socket to
> shutdown. I think you have a client connecting and disconnecting
> rapidly. Network browsing perhaps?
> What is the client at 192.168.0.199?
That client is a Windows 2000 desktop which is 99% reserved for backup
purposes. It connects to a local Linux computer (192.168.0.99) via
Samba (using a mapped drive, of course) and then addresses four NFS
mounts to get new and updated files off four distant servers.

When Samba goes real crazy with process creations, there is one
created every minute during a backup sequence which lasts about 30
minutes. This happens four times a day since the backup software is
set up to do backups every six hours.

Your help is most appreciated.


Beno?t

Gerald (Jerry) Carter

2005-Oct-14 14:15 UTC

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[Samba] Samba creating multiple isntances of the deamon

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Benoit Gauthier wrote:
| (2005.10.14, 09:59)
|
|> Is the machine accessing the Samba server via unc path name? You
|> might want to try it as a mapped drive.
|
| It is already accessed via a mapped drive.

Can you send me an ethereal trace of a backup (off-list)?
What is the name of the backup software?




cheers, jerry
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Benoit Gauthier

2005-Oct-17 12:19 UTC

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[Samba] Samba creating multiple isntances of the deamon

(2005.10.17, 08:11)
> Will one of the long lived processes respond to kill -TERM ?
All processes die after a "killall -9 smbd" even though the oldest one
takes several seconds to do so.

I have additional problems which appear to be associated with version
3.0.20b since I did not experience them before installing it (I used
to run the version which comes with Fedora 4, 3.0.14 is it?): after a
clear start of the Samba service, I can run my 4-server backup job on
the Windows computer without problem. However, when the backup job is
started again (automatically, 6 hours later, or manually) various
directories on at least one of the servers do not return a file list
and time out the backup process. If I stop Samba and re-start it,
everything is back to normal... for one iteration of the backup.

What additional information would be useful to diagnose the problem?

Is there a way to retrofit to the previous version of Samba?


Beno?t

=======================================================
Beno?t Gauthier, mailto:gauthier@circum.com
R?seau Circum inc. / Circum Network Inc.

Nouvelles/News http://circum.com

74, rue du Val-Perch?, Gatineau, Qu?bec (Canada) J8Z 2A6
+1 819.770.2423  t?lec. fax: +1 819.770.5196

=======================================================
http://c2005.evaluationcanada.ca/
http://evaluationcanada.ca/
http://simulation.evaluationcanada.ca/

Jeremy Allison

2005-Oct-17 15:35 UTC

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[Samba] Samba creating multiple isntances of the deamon

On Mon, Oct 17, 2005 at 08:17:43AM -0400, Benoit Gauthier
wrote:> (2005.10.17, 08:11)
> 
> > Will one of the long lived processes respond to kill -TERM ?
> 
> All processes die after a "killall -9 smbd" even though the
oldest one
> takes several seconds to do so.
Never kill smbd with -9. It can leave important tdb files in a
corrupt state.

Jeremy.

Barry, Christopher

2005-Oct-17 15:41 UTC

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[Samba] Samba creating multiple isntances of the deamon

is simply 'killall smbd' the preferre invocation?

-C
> -----Original Message-----
> From: Jeremy Allison [mailto:jra@samba.org] 
> Sent: Monday, October 17, 2005 11:29 AM
> To: Benoit Gauthier; g@samba.org
> Cc: samba@lists.samba.org; Gerald (Jerry) Carter
> Subject: Re: [Samba] Samba creating multiple isntances of the deamon
> 
> On Mon, Oct 17, 2005 at 08:17:43AM -0400, Benoit Gauthier wrote:
> > (2005.10.17, 08:11)
> > 
> > > Will one of the long lived processes respond to kill -TERM ?
> > 
> > All processes die after a "killall -9 smbd" even though the 
> oldest one
> > takes several seconds to do so.
> 
> Never kill smbd with -9. It can leave important tdb files in a
> corrupt state.
> 
> Jeremy.
> -- 
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/listinfo/samba
>

William Jojo

2005-Oct-17 15:44 UTC

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[Samba] Samba creating multiple isntances of the deamon

----- Original Message ----- 
From: "Jeremy Allison" <jra@samba.org>
To: "Benoit Gauthier" <gauthier@circum.com>; <g@samba.org>
Cc: <samba@lists.samba.org>; "Gerald (Jerry) Carter"
<jerry@samba.org>
Sent: Monday, October 17, 2005 11:29 AM
Subject: Re: [Samba] Samba creating multiple isntances of the deamon

> On Mon, Oct 17, 2005 at 08:17:43AM -0400, Benoit Gauthier wrote:
> > (2005.10.17, 08:11)
> >
> > > Will one of the long lived processes respond to kill -TERM ?
> >
> > All processes die after a "killall -9 smbd" even though the
oldest one
> > takes several seconds to do so.
>
> Never kill smbd with -9. It can leave important tdb files in a
> corrupt state.
I have also experienced OpenLDAP related problems from smbd being killed
with -9 that required db_recover to be run before slapd would restart nicely
with BerkeleyDB. Never use -9!!

Cheers,

Bill
>
> Jeremy.
> -- 
> To unsubscribe from this list go to the following URL and read the
> instructions:  https://lists.samba.org/mailman/listinfo/samba
>

Benoit Gauthier

2005-Oct-18 14:51 UTC

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[Samba] Samba creating multiple isntances of the deamon

(2005.10.18, 10:48)
> Never kill smbd with -9. It can leave important tdb files in a
> corrupt state.
So, what is the right way to kill smbd altogether?

Until a solution is found to the current problem, I need to start it
afresh so that my back-ups will take place.

Thanks in advance.


Beno?t

Benoit Gauthier

2005-Oct-19 11:38 UTC

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[Samba] Samba creating multiple isntances of the deamon

(2005.10.19, 07:36)
>> OK. I've figured out how to do it. Which of the numerous Samba
>> processes should I do this on though?
> On one of those you've tried to kill with a normal kill command but
> hasn't died....
Here is such an output.

Beno?t



Attaching to program: /usr/sbin/smbd, process 3456
(no debugging symbols found)
Loaded symbols for /usr/sbin/smbd
Reading symbols from /usr/lib/libldap-2.2.so.7...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libldap-2.2.so.7
Reading symbols from /usr/lib/liblber-2.2.so.7...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/liblber-2.2.so.7
Reading symbols from /usr/lib/libgssapi_krb5.so.2...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libgssapi_krb5.so.2
Reading symbols from /usr/lib/libkrb5.so.3...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libkrb5.so.3
Reading symbols from /usr/lib/libk5crypto.so.3...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libk5crypto.so.3
Reading symbols from /usr/lib/libkrb5support.so.0...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libkrb5support.so.0
Reading symbols from /lib/libcom_err.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libcom_err.so.2
Reading symbols from /lib/libresolv.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /usr/lib/libcups.so.2...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libcups.so.2
Reading symbols from /lib/libssl.so.5...(no debugging symbols found)...done.
Loaded symbols for /lib/libssl.so.5
Reading symbols from /lib/libcrypto.so.5...(no debugging symbols found)...done.
Loaded symbols for /lib/libcrypto.so.5
Reading symbols from /lib/libnsl.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libcrypt.so.1...
(no debugging symbols found)...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /lib/libpam.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib/libpam.so.0
Reading symbols from /lib/libattr.so.1...done.
Loaded symbols for /lib/libattr.so.1
Reading symbols from /lib/libacl.so.1...done.
Loaded symbols for /lib/libacl.so.1
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /usr/lib/libpopt.so.0...done.
Loaded symbols for /usr/lib/libpopt.so.0
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /usr/lib/libsasl2.so.2...done.
Loaded symbols for /usr/lib/libsasl2.so.2
Reading symbols from /usr/lib/libz.so.1...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/libaudit.so.0...done.
Loaded symbols for /lib/libaudit.so.0
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/lib/gconv/UTF-16.so...done.
Loaded symbols for /usr/lib/gconv/UTF-16.so
Reading symbols from /usr/lib/gconv/IBM850.so...done.
Loaded symbols for /usr/lib/gconv/IBM850.so
Reading symbols from /lib/libnss_files.so.2...done.
Loaded symbols for /lib/libnss_files.so.2
0x007d1402 in ?? ()
(gdb) bt
#0  0x007d1402 in ?? ()
#1  0x005e40a6 in flock () from /lib/libc.so.6
#2  0x0098cb52 in open_file_ntcreate () from /usr/sbin/smbd
#3  0x0095c105 in reply_ntcreate_and_X () from /usr/sbin/smbd
#4  0x009a200f in push_oplock_pending_smb_message () from /usr/sbin/smbd
#5  0x009a2668 in process_smb () from /usr/sbin/smbd
#6  0x009a2aa2 in smbd_process () from /usr/sbin/smbd
#7  0x00b5e970 in main () from /usr/sbin/smbd
(gdb)

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