Connection refused to host: 10.15.66.164; nested exception is: java.net.ConnectException: Connection refused

Stack trace

java.rmi.ConnectException: Connection refused to host: 10.15.66.164; nested exception is: 
 java.net.ConnectException: Connection refused
	at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
	at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:210)
	at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:196)
	at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:122)
	at com.ibm.ccd.scheduler.common.Scheduler_Stub.getRunningInfo(Scheduler_Stub.java:236)
	at com.ibm.ccd.scheduler.common.JobStatus._updateStatus(JobStatus.java:71)
	at com.ibm.ccd.scheduler.common.JobStatus.getCached(JobStatus.java:147)
	at com.ibm.ccd.scheduler.common.JobStatus.getRunningByJobId(JobStatus.java:158)
	at com.ibm.ccd.scheduler.threads.MasterThread.checkJobNotCurrentlyRunningOnAnyJVM(MasterThread.java:266)
	at com.ibm.ccd.scheduler.threads.MasterThread.fuzaoRun(MasterThread.java:418)
	at com.ibm.ccd.common.util.FuzaoRunnableAdapter.run(FuzaoRunnableAdapter.java:54)
	at com.ibm.ccd.common.util.FuzaoThread.run(FuzaoThread.java:123)
Caused by: java.net.ConnectException: Connection refused
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:381)
	at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:243)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:230)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:377)
	at java.net.Socket.connect(Socket.java:539)
	at java.net.Socket.connect(Socket.java:488)
	at java.net.Socket.<init>(Socket.java:385)
	at java.net.Socket.<init>(Socket.java:199)
	at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:34)
	at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:140)
	at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:607)
	... 11 more