** Description changed: Versions: root@juju-xh-machine-5:~# dpkg -l|grep openvswitch ii openvswitch-common 2.0.2-0ubuntu0.14.04.1 amd64 Open vSwitch common components ii openvswitch-switch 2.0.2-0ubuntu0.14.04.1 amd64 Open vSwitch switch implementations root@juju-xh-machine-5:~# uname -a Linux juju-precise-machine-5 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux root@juju-xh-machine-5:~# cat /etc/issue Ubuntu 14.04.1 LTS \n \l + + root@juju-precise-machine-5:/var/log/neutron# dpkg -l|grep neutron + ii neutron-common 1:2014.1.3-0ubuntu1.1 all Neutron is a virtual network service for Openstack - common + ii neutron-plugin-ml2 1:2014.1.3-0ubuntu1.1 all Neutron is a virtual network service for Openstack - ML2 plugin + ii neutron-plugin-openvswitch-agent 1:2014.1.3-0ubuntu1.1 all Neutron is a virtual network service for Openstack - Open vSwitch plugin agent + ii python-neutron 1:2014.1.3-0ubuntu1.1 all Neutron is a virutal network service for Openstack - Python Erros: root@juju-xh-machine-5:~# ovs-vsctl show 2014-12-25T09:26:56Z|00001|reconnect|WARN|unix:/var/run/openvswitch/db.sock: connection attempt failed (Protocol error) ovs-vsctl: unix:/var/run/openvswitch/db.sock: database connection failed (Protocol error) root@juju-precise-machine-5:~# tail -f /var/log/neutron/openvswitch-agent.log 2014-12-25 09:37:03.990 20991 ERROR neutron.agent.linux.ovsdb_monitor [-] Error received from ovsdb monitor: ovsdb-client: unix:/var/run/openvswitch/db.sock: receive failed (End of file) 2014-12-25 09:44:53.796 20991 ERROR neutron.agent.linux.ovsdb_monitor [-] Error received from ovsdb monitor: 2014-12-25T09:44:53Z|00001|fatal_signal|WARN|terminating with signal 15 (Terminated) Workaround: restart openvswitch-switch But ovs-vsctl will get this error every several minutes, this caused neutron-plugin-openvswitch-agent keep reporting errors since ovs-vsctl is wrong. + + The root cause is : + Neutron agent will call ovs monitor to get interfaces info, but ovs monitor process will be respawned every 'respawn_interval' minutes due to get error output 'sudo: unable to resolve host juju-precise-machine-5' when running command 'sudo neutron-rootwrap /etc/neutron/rootwrap.conf ovsdb-client monitor Interface name,ofport --format=json', after several times the ovs db socket is reconnected for multiple times, however, some of them are not released well, and it goes to the maxim limit of socket number, which leads to connect to ovsdb server failed. + + Currently, one possible fix in code is to add hostname to /etc/hosts + followed by 127.0.0.1 or localhost to avoid the error 'sudo: unable to + resolve host juju-precise-machine-5' in openvswitch charm.
-- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openvswitch in Ubuntu. https://bugs.launchpad.net/bugs/1405588 Title: database connection failed (Protocol error) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openvswitch/+bug/1405588/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs