samba - Mar 2016 - 'Smb' server service is reason of panic of Samba 436 smbd daemon.

Yes, exactly.
Also, bind9 is used.
Such behavior I saw at 436 at Ubuntu 14.04 x64.
There was not so with 434 at Ubuntu 14.04 x32.

Unfortunatelly, I didn' t understand what you said in 2nd part of phrase.

I understand that if remove either some services or all from the line, it
will turn it off.
But I suppose, that 'smb' additionally tries to turn on smb which has
been
already on and as a result second start smb causes socket error because the
socket are already in use.
> Do you mean you have 'server services = smb, ...........' or
something
> like this, if so remove 'smb', there is no 'smb' option
that I am aware
> of and unless you are using bind9, you will not have a 'server
services'
> line in smb.conf as standard and adding one without giving all the
> options will turn off any you don't add.



2016-03-14 22:39 GMT+03:00 CpServiceSPb . <cpservicespb at gmail.com>:
> I simply added 'smb' to 'server service' and got:
> [2016/03/13 18:05:15.524842,  5, pid=27511, effective(0, 0), real(0, 0)]
../lib/dbwrap/dbwrap.c:146(dbwrap_lock_order_state_destructor)
>   release lock order 2 for /usr/local/samba/var/lock/serverid.tdb
> [2016/03/13 18:05:15.524866, 10, pid=27511, effective(0, 0), real(0, 0)]
../lib/dbwrap/dbwrap.c:133(debug_lock_order)
>   lock order:  1:<none> 2:<none> 3:<none>
> [2016/03/13 18:05:15.525284,  0, pid=27511, effective(0, 0), real(0, 0)]
../source3/lib/util.c:789(smb_panic_s3)
>   PANIC (pid 27511): open_sockets_smbd() failed
> [2016/03/13 18:05:15.526215,  0, pid=27511, effective(0, 0), real(0, 0)]
../source3/lib/util.c:900(log_stack_trace)
>   BACKTRACE: 9 stack frames:
>    #0 /usr/local/samba/lib/libsmbconf.so.0(log_stack_trace+0x1f)
[0x7f51474c3298]
>    #1 /usr/local/samba/lib/libsmbconf.so.0(smb_panic_s3+0x6f)
[0x7f51474c30e3]
>    #2 /usr/local/samba/lib/libsamba-util.so.0(smb_panic+0x28)
[0x7f5149b623a1]
>    #3 /usr/local/samba/lib/private/libsmbd-base-samba4.so(+0x1b6925)
[0x7f514971e925]
>    #4
/usr/local/samba/lib/private/libsmbd-base-samba4.so(smbd_exit_server_cleanly+0)
[0x7f514971e9dc]
>    #5 /usr/local/samba/lib/private/libsmbd-shim-samba4.so(exit_server+0x28)
[0x7f5146e81c03]
>    #6 /usr/local/samba/sbin/smbd(main+0x1670) [0x562b9a0190aa]
>    #7 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)
[0x7f5145da7ec5]
>    #8 /usr/local/samba/sbin/smbd(+0x6249) [0x562b9a014249]
> [2016/03/13 18:05:15.526531,  0, pid=27511, effective(0, 0), real(0, 0)]
../source3/lib/util.c:801(smb_panic_s3)
>   smb_panic(): calling panic action [/bin/sleep 999999999]
>
>
> > It does sound like you are doing something wrong, please answer my
reply to your first post.
>
>
>
>

On 14/03/16 20:15, CpServiceSPb . wrote:
> Yes, exactly.
> Also, bind9 is used.
> Such behavior I saw at 436 at Ubuntu 14.04 x64.
> There was not so with 434 at Ubuntu 14.04 x32.
>
> Unfortunatelly, I didn' t understand what you said in 2nd part of
phrase.
>
> I understand that if remove either some services or all from the line, it
> will turn it off.
> But I suppose, that 'smb' additionally tries to turn on smb which
has been
> already on and as a result second start smb causes socket error because the
> socket are already in use.
OOPS :-[

You can use the 'smb' option, but because I never use it, I forgot all 
about it, also your line in smb.conf should be something like this:

server services = smb, rpc, nbt, wrepl, ldap, cldap, kdc, drepl, 
winbindd, ntp_signd, kcc, dnsupdate

You will now find that you are using the ntvfs backend, which isn't as 
feature rich as the s3fs backend and isn't really maintained and there 
was some recent talk about removing the ntvfs backend.

Please stop using the 'smb' option and then see if you have any problems
with your DC.

Also if you want to run Samba 4 as a standalone server, see here:

https://wiki.samba.org/index.php/Standalone_server

Rowland

I saw at the link, I tried simple conf posted at link, but didn' t get
working result.
By the way, I use passdb backend = samba_dsdb

Which backend should I use withion standalone server ?

After deleting all content of private folder (after provision as standalone
server) I got 'smbd' error: "pdb_samba_dsdb_init_secrets
failed!"


> Also if you want to run Samba 4 as a standalone server, see here:
 > https://wiki.samba.org/index.php/Standalone_server 
<https://wiki.samba.org/index.php/Standalone_server>