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Unable to connect to AMQP server

Hi all,

I have installed openstack using RDO on fedora 19. Now, the system was unused for a few days. When i opened it today, the setup is not working. I mean I can access nova, glance, keystone etc. but I cant launch the instance. Whenever I tried to boot a VM, it gets stuck at build stage. So, I decided to restart nova-compute and scheduler processes (Have worked for me in past) and here is the output I am getting:

2014-03-27 14:48:44.355 ERROR nova.openstack.common.rpc.impl_qpid [req-2d415e36-dd79-4971-838d-5f1b4e32e64c None None] Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Sleeping 1 seconds 2014-03-27 14:48:45.372 ERROR nova.openstack.common.rpc.impl_qpid [req-2d415e36-dd79-4971-838d-5f1b4e32e64c None None] Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Sleeping 2 seconds 2014-03-27 14:48:47.376 ERROR nova.openstack.common.rpc.impl_qpid [req-2d415e36-dd79-4971-838d-5f1b4e32e64c None None] Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Sleeping 4 seconds

Both the processes are giving the same error. Can you please help me solve the error? Plus, the machine might have been rebooted, if that info is useful.