OCS server is in sentos 6.9 and ocs version 2.2.1... Please find the error logs
[Fri May 12 11:42:54 2017] [warn] ./mod_dnssd.c: No services found to register
[Fri May 12 11:42:54 2017] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.6.30 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
[Fri May 12 11:46:29 2017] [notice] caught SIGTERM, shutting down
ocsinventory-server: Can't load SOAP::Transport::HTTP* - Web service will be unavailable
[Fri May 12 11:47:37 2017] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
ocsinventory-server: Can't load SOAP::Transport::HTTP* - Web service will be unavailable
[Fri May 12 11:47:38 2017] [notice] Digest: generating secret for digest authentication ...
[Fri May 12 11:47:38 2017] [notice] Digest: done
[Fri May 12 11:47:42 2017] [warn] ./mod_dnssd.c: No services found to register
[Fri May 12 11:47:42 2017] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.6.30 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations