[Rdo-list] no valid host was found: nova problem

hello guys , When I try to launch an instance, have this error, no valmid host was found. I found these errors in the file logs of nova and rabbitmq but don't know how to proceed: *grep error nova-scheduler.log* 2015-04-17 15:41:25.119 1976 TRACE oslo.messaging._drivers.impl_rabbit error: [Errno 110] Connection timed out 2015-04-17 16:34:37.163 1959 TRACE oslo.messaging._drivers.impl_rabbit error: [Errno 110] Connection timed out *grep error nova-api.log* 2015-04-20 01:13:52.005 4748 WARNING keystonemiddleware.auth_token [-] Identity response: {"error": {"message": "Could not find token: 868d85f2de3d49878af5b6f79d80e8de", "code": 404, "title": "Not Found"}} 2015-04-20 02:13:52.022 4741 WARNING keystonemiddleware.auth_token [-] Identity response: {"error": {"message": "Could not find token: b309783b561b44ef904b3c4a6ab474bd", "code": 404, "title": "Not Found"}} 2015-04-20 03:13:52.004 4737 WARNING keystonemiddleware.auth_token [-] Identity response: {"error": {"message": "Could not find token: 24eed0bb37b54445bd753359b234a0c4", "code": 404, "title": "Not Found"}} 2015-04-20 04:13:52.033 4741 ERROR nova.api.openstack [req-b521803c-e80c-4e86-a30b-16e5c57da918 None] Caught error: auth_url was not provided to the Neutron client 2015-04-20 04:23:52.044 4742 WARNING keystonemiddleware.auth_token [-] Identity response: {"error": {"message": "Could not find token: 6d3e77f2cf75495297c34133bc765bd8", "code": 404, "title": "Not Found"}} 2015-04-20 05:23:52.047 4736 ERROR nova.api.openstack [req-95702e17-0960-451a-b5c1-828172b27bc0 None] Caught error: auth_url was not provided to the Neutron client 2015-04-20 05:33:52.024 4731 WARNING keystonemiddleware.auth_token [-] Identity response: {"error": {"message": "Could not find token: ccaee1e396614df5a753a331345e3e24", "code": 404, "title": "Not Found"}} 2015-04-20 06:33:52.013 4740 ERROR nova.api.openstack [req-711d560d-e9c3-48f3-aabe-28e138ae06e1 None] Caught error: auth_url was not provided to the Neutron client 2015-04-20 06:43:51.887 4737 WARNING keystonemiddleware.auth_token [-] Identity response: {"error": {"message": "Could not find token: 6ad03759c8f446d09d4babde1aa7f63d", "code": 404, "title": "Not Found"}} 2015-04-20 07:43:52.178 4747 ERROR nova.api.openstack [req-d0caca70-b960-4612-b99f-ca42292cb6b4 None] Caught error: auth_url was not provided to the Neutron client 2015-04-20 07:53:52.037 4742 WARNING keystonemiddleware.auth_token [-] Identity response: {"error": {"message": "Could not find token: 0bcaad841985487bbfe4bce038b49c9e", "code": 404, "title": "Not Found"}} *grep error /var/log/rabbitmq/rabbit\(a)localhost.log* AMQP connection <0.865.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1312.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.499.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1657.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.9349.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.761.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.2801.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.4447.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1065.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.712.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.618.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.664.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.9428.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1222.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.9530.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.9496.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.6746.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.9479.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.9280.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.9295.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1203.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1420.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.9513.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1048.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.741.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1734.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1390.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1400.0> (running), channel 0 - error: {amqp_error,connection_forced, AMQP connection <0.1430.0> (running), channel 0 - error: {amqp_error,connection_forced,