Jboss fuse AMQ is not seen in JON

We have seen below error in agent.log on client server.JON is not able to discover the fuse applications:

2017-11-09 10:36:26,117 ERROR [RHQ Agent Registration Thread] (org.rhq.enterprise.agent.AgentMain)- {AgentMain.failover-list-unknown-host}Failover list has an unknown host [spapnltcbapp02]
2017-11-09 10:36:56,161 ERROR [RHQ Agent Registration Thread] (org.rhq.enterprise.agent.AgentMain)- {AgentMain.failover-list-unknown-host}Failover list has an unknown host [spapnltcbapp02]

Kindly help on this