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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: neutron
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1239030

Title:
  Should add error log for SystemExit in dhcp agent

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  OS : RHEL6.4
  Version : Havana

  If a nonexistent interface_driver is indicated, the neutron-dhcp-agent won't start correctly,
  but no hints show up neither from the screen output or the log.

  [root@oc2603148815 xianghui]# service neutron-dhcp-agent restart
  Stopping neutron-dhcp-agent:                               [  OK  ]
  Starting neutron-dhcp-agent:                               [  OK  ]
  [root@oc2603148815 xianghui]# ps -ef|grep neutron-dhcp-agent
  root     13763 13095  0 21:21 pts/4    00:00:00 grep --color=auto neutron-dhcp-agent

  [root@oc2603148815 xianghui]# vi /var/log/neutron/dhcp-agent.log
  2013-10-11 21:22:06.662 14164 INFO neutron.common.config [-] NT-21CCD27 Logging enabled!
  2013-10-11 21:22:06.662 14164 ERROR neutron.common.legacy [-] NT-EC4C0E3 Skipping unknown group key: firewall_driver
  2013-10-11 21:22:06.716 14164 INFO neutron.openstack.common.rpc.impl_qpid [-] NT-1A047FB Connected to AMQP server on localhost:5672
  2013-10-11 21:22:06.718 14164 INFO neutron.openstack.common.rpc.impl_qpid [-] NT-1A047FB Connected to AMQP server on localhost:5672
  2013-10-11 21:22:06.732 14164 INFO neutron.openstack.common.rpc.impl_qpid [-] NT-1A047FB Connected to AMQP server on localhost:5672
  2013-10-11 21:22:06.735 14164 INFO neutron.agent.dhcp_agent [-] NT-F659682 DHCP agent started
  2013-10-11 21:22:06.805 14164 INFO neutron.agent.dhcp_agent [-] NT-637ECE3 Synchronizing state

  The error should be logged to help operators locate the bug.

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