Hi all,<br><br>In our organization, as part of one product we are building a multinode openstack setup. The setup contains once controller node(api, scheduler, cert services are installed in it) and more than one compute nodes(Compute and Network services are installed in it). In this setup, sometimes the rabbitmq service is getting continuously hanged, with the command <span style="background-color: rgb(255, 255, 0);"><b>rabbitmqctl list_queues</b></span>, not all the compute nodes are listing. <br><br>In the scheduler logs, we are continuously getting the following error.<br><span style="color: rgb(153, 0, 255);"><font size="1"><br><span style="color: rgb(19, 79, 92);">2013-01-18 07:29:02 INFO nova.rpc.common [-] Reconnecting to AMQP server on ---------------<br>2013-01-18 07:29:02 ERROR nova.rpc.common [-] AMQP server on -------------- is unreachable: [Errno 111] ECONNREFUSED. Trying again in 3 seconds.<br>2013-01-18 07:29:02 TRACE nova.rpc.common Traceback (most recent call last):<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/local/lib/python2.7/dist-packages/nova-2012.1.1-py2.7.egg/nova/rpc/impl_kombu.py", line 446, in reconnect<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; self._connect()<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/local/lib/python2.7/dist-packages/nova-2012.1.1-py2.7.egg/nova/rpc/impl_kombu.py", line 423, in _connect<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; self.connection.connect()<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/lib/python2.7/dist-packages/kombu/connection.py", line 95, in connect<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; return self.connection<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/lib/python2.7/dist-packages/kombu/connection.py", line 396, in connection<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; self._connection = self._establish_connection()<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/lib/python2.7/dist-packages/kombu/connection.py", line 364, in _establish_connection<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; return self.transport.establish_connection()<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/lib/python2.7/dist-packages/kombu/transport/pyamqplib.py", line 219, in establish_connection<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; connect_timeout=conninfo.connect_timeout)<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/lib/python2.7/dist-packages/kombu/transport/pyamqplib.py", line 45, in __init__<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; super(Connection, self).__init__(*args, **kwargs)<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/lib/python2.7/dist-packages/amqplib/client_0_8/connection.py", line 129, in __init__<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; self.transport = create_transport(host, connect_timeout, ssl)<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/lib/python2.7/dist-packages/amqplib/client_0_8/transport.py", line 281, in create_transport<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; return TCPTransport(host, connect_timeout)<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp; File "/usr/lib/python2.7/dist-packages/amqplib/client_0_8/transport.py", line 85, in __init__<br>2013-01-18 07:29:02 TRACE nova.rpc.common&nbsp;&nbsp;&nbsp;&nbsp; raise socket.error, msg<br>2013-01-18 07:29:02 TRACE nova.rpc.common error: [Errno 111] ECONNREFUSED</span></font></span><br><br><br>Can any one please suggest the solution, how can i make the rabbitmq server service available all the time.<br><br>Thanks in advance,<br>D Anil Kumar.<br>