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The embedded ActiveMQ in ServiceMix is configured to use network multicasts to discover other broker instances on the network. Sometimes, multicasts are disabled by policy, causing this exception:

ERROR - BrokerService - Failed to start ActiveMQ JMS Message Broker. Reason: java.net.SocketException: error setting options

The solution is to disable the multicast feature for ActiveMQ. In conf/activemq.xml, change... 

    <transportConnectors>
      <transportConnector uri="tcp://localhost:61616" discoveryUri="multicast://default"/>
    </transportConnectors>
 
    <networkConnectors>
      <networkConnector uri="multicast://default"/>
    </networkConnectors>

... to ...

    <transportConnectors>
      <transportConnector uri="tcp://localhost:61616"/>
    </transportConnectors>
 
    <networkConnectors>
    </networkConnectors>
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