[Bug 1339434] Re: Samba4 get stuck after a server reboot, if IPv6 is enabled.

[Georg Abenthung]

+1

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https://bugs.launchpad.net/bugs/1339434

Title:
  Samba4 get stuck after a server reboot, if IPv6 is enabled.

Status in Samba:
  Unknown
Status in samba package in Ubuntu:
  Confirmed

Bug description:
  Guys,

  I'm trying to deploy Samba4 AD DC with IPv6 and I'm facing a hard time
  (LP #1335502)... First, it didn't worked "as-is", now, after enabling
  IPv6 in Samba4 AD DC, it does not come up after a server reboot, it
  get stucked, look:

  ---
  root at ubuntu-ad-1:~# host -t SRV _ldap._tcp.tcmc.com.br
  _ldap._tcp.tcmc.com.br has SRV record 0 100 389 ubuntu-ad-1.tcmc.com.br.
  root at ubuntu-ad-1:~# reboot

  Broadcast message from administrativo at ubuntu-ad-1
   (/dev/pts/2) at 22:10 ...

  The system is going down for reboot NOW!
  root at ubuntu-ad-1:~# Connection to 192.168.15.221 closed by remote host.
  Connection to 192.168.15.221 closed.

  --

  tmartins at zion:~$ ssh administrativo at 192.168.15.221
  administrativo at 192.168.15.221's password:
  Welcome to Ubuntu 14.04 LTS (GNU/Linux 3.13.0-30-generic x86_64)

   * Documentation:  https://help.ubuntu.com/
  Last login: Tue Jul  8 22:09:22 2014 from 192.168.0.104
  administrativo at ubuntu-ad-1:~$ sudo -i
  [sudo] password for administrativo:
  root at ubuntu-ad-1:~# host -t SRV _ldap._tcp.tcmc.com.br
  Host _ldap._tcp.tcmc.com.br not found: 3(NXDOMAIN)
  root at ubuntu-ad-1:~#
  ---

  Then, I tried:

  ---
  root at ubuntu-ad-1:~# pidof samba
  675

  root at ubuntu-ad-1:~# pidof smbd
  791 719

  root at ubuntu-ad-1:~# host -t SRV _ldap._tcp.tcmc.com.br
  Host _ldap._tcp.tcmc.com.br not found: 3(NXDOMAIN)
  ---

  See it?!

  Now I'm doing:

  ---
  root at ubuntu-ad-1:~# ps xfa
  ....
    461 ?        S      0:00 avahi-daemon: running [ubuntu-ad-1.local]
    462 ?        S      0:00  \_ avahi-daemon: chroot helper
    675 ?        S      0:00 samba -D
    719 ?        Ss     0:00  \_ /usr/sbin/smbd -D --option=server role check:inhibit=yes --f
    791 ?        S      0:00      \_ /usr/sbin/smbd -D --option=server role check:inhibit=yes
    728 ?        Ss     0:00 /usr/sbin/cups-browsed
    745 ?        S      0:00 upstart-file-bridge --daemon
  ....
  ---

  So, samba is stucked, I'm not seeing the others "samba" child process
  as usual, then I tried:

  ---
  root at ubuntu-ad-1:~# service samba-ad-dc stop
  stop: Unknown instance:

  root at ubuntu-ad-1:~# killall samba smbd
  root at ubuntu-ad-1:~#

  root at ubuntu-ad-1:~# service samba-ad-dc start
  samba-ad-dc start/running, process 1446

  root at ubuntu-ad-1:~# host -t SRV _ldap._tcp.tcmc.com.br
  _ldap._tcp.tcmc.com.br has SRV record 0 100 389 ubuntu-ad-1.tcmc.com.br.
  ---

  Back online!!

  I believe that there is something wrong with the Samba4 init scripts
  when we have IPv6 enabled.

  Cheers!
  Thiago

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