Hi all

The following is the backtrace when the samba hanged .
samba version 3.0.21c there were about 168 process and samba was unable to
take
any new connection
################################################## #############
(gdb) attach 2955
Attaching to process 2955
Reading symbols from /usr/local/samba3c3/sbin/smbd...done.
Using host libthread_db library "/lib/tls/libthread_db.so.1".
Loaded symbols for /usr/local/samba3c3/sbin/smbd
Reading symbols from /usr/lib/libldap-2.2.so.7...done.
Loaded symbols for /usr/lib/libldap-2.2.so.7
Reading symbols from /usr/lib/liblber-2.2.so.7...done.
Loaded symbols for /usr/lib/liblber-2.2.so.7
Reading symbols from /usr/lib/libgssapi_krb5.so.2...done.
Loaded symbols for /usr/lib/libgssapi_krb5.so.2
Reading symbols from /usr/lib/libkrb5.so.3...done.
Loaded symbols for /usr/lib/libkrb5.so.3
Reading symbols from /usr/lib/libk5crypto.so.3...done.
Loaded symbols for /usr/lib/libk5crypto.so.3
Reading symbols from /lib/libcom_err.so.2...done.
Loaded symbols for /lib/libcom_err.so.2
Reading symbols from /lib/libresolv.so.2...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /usr/lib/libcups.so.2...done.
Loaded symbols for /usr/lib/libcups.so.2
Reading symbols from /lib/libssl.so.4...done.
Loaded symbols for /lib/libssl.so.4
Reading symbols from /lib/libcrypto.so.4...done.
Loaded symbols for /lib/libcrypto.so.4
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libcrypt.so.1...done.
Loaded symbols for /lib/libcrypt.so.1
Reading symbols from /lib/libpam.so.0...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 /lib/tls/librt.so.1...done.
Loaded symbols for /lib/tls/librt.so.1
Reading symbols from /usr/lib/libpopt.so.0...done.
Loaded symbols for /usr/lib/libpopt.so.0
Reading symbols from /lib/tls/libc.so.6...done.
Loaded symbols for /lib/tls/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/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/tls/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread -1208101184 (LWP 2955)]
Loaded symbols for /lib/tls/libpthread.so.0
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
Reading symbols from /lib/libnss_ldap.so.2...done.
Loaded symbols for /lib/libnss_ldap.so.2
0x001117a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
(gdb) bt
#0 0x001117a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x0025950d in ___newselect_nocancel () from /lib/tls/libc.so.6
#2 0x00d91b0d in sys_select (maxfd=3D23, readfds=3D0xbfec4040, writefds=3D=
0x0,
errorfds=3D0x0, tval=3D0x0)
at lib/select.c:93
#3 0x00e3184c in open_sockets_smbd (is_daemon=3D1, interactive=3D0,
smb_ports=3D0x0)
at smbd/server.c:350
#4 0x00e32bdd in main (argc=3D2, argv=3D0xbfec5414) at smbd/server.c:916
(gdb) quit
################################################## ##############

some times if the processes get killed, but it does not release any memory,
occupying all the
memory that i have

our server hardware information
IBM X226 series Xeon Processor 3Ghz
with 1 Gb RAM and 2 GB swap
we have 72 gb hard-disk with software RAID 1 on it

2q) when the physical RAM is occupied, then why it doesn't take any swap
space when the swap
space is free,


On 3/29/06, Matt Lung wrote:
>
>
>
> Martin Zielinski wrote:
> > Bruno Gomes Pessanha wrote:
> >> I'm having the same problem... but with a 520 print queues samba
> >> server and
> >> 20.000 AD users.
> >> I'm getting desperate! I did a lot of tuning changes..... but nothing
> >> helps!
> >>
> >> Bruno
> >>

> > [...]
> >
> > If i remember correctly, the original description of the problem has
> > been, that the number of smbd proccess is growing until this breaks
> > the whole system (correct me, if I'm wrong).

>
> Actually it does not break the whole system. Only Samba is broken. All
> other services continue running on the server and work fine, but samba
> just hangs and connections that were already made stop working, and all
> new connections are denied. Please review bug #3636 that I submitted
> yesterday.
>
> If more information is needed I'll provide it, but for now I'm waiting
> for it to crash again to get an strace on one of the processes and more
> debug at level 10.
>
> Thanks
> Matt Lung
> >
> > In your case the reason might be that clients leave *one* spoolss-pipe
> > open, after they have opened (and closed) a connection to a printer.
> > The deadtime parameter is not working, because of this one open
> > connection.
> > BTW, this is diffrent to connections with admin rights.
> >
> > To fix this, I add the following lines to smbd/conn.c:
> > ---- start code
> > for (conn=3DConnections;conn;conn=3Dnext) {
> > next=3Dconn->next;
> > /* close dirptrs on connections that are idle */
> > if ((t-conn->lastused) > DPTR_IDLE_TIMEOUT)
> > dptr_idlecnum(conn);
> > + /* force the closure, even if one spoolss is open */
> > + if (conn->num_files_open =3D=3D 1 && (t-conn->lastused)>=3Ddea=

dtime)
> {
> > + for (plist =3D get_first_internal_pipe(); plist;
> > + plist =3D get_next_internal_pipe(plist)) {
> > + if (plist->name && !strcmp (plist->name, "spoolss")) {
> > + DEBUG(2,("Client holds one spoolss connection.
> > Deadtime reached. Closing last pipe\n"));
> > + pipe_close_conn (conn);
> > + break;
> > + }
> > + }
> > + }
> > +
> > if (conn->num_files_open > 0 ||
> > (t-conn->lastused) > > allidle =3D False;
> > }
> > ---- end code
> >
> > If the description meets your existing problem, this might help.
> > (There was an earlier discussion with Gerald Carter about this topic -
> > this might be his code or merged with mine - I don't remember excactly)
> >
> > Bye,
> > Martin
> >
> >> --
> >> ---
> >> Bruno Gomes Pessanha
> >> LPI Brasil

> >
> >

>
> --
> Matt Lung
>
> Midwest Tool & Die, Corp.
>
>
> --
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> instructions: https://lists.samba.org/mailman/listinfo/samba
>

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