A connection error occurs during tajo starts up

[Jihoon Son]

Hi, guys.

By the recent update, a Tajo cluster has a master process and several
worker processes.
For workers, I added the following configurations to tajo-site.xml.

<property>
  <name>tajo.master.manager.addr</name>
  <value>*addr:port*</value>
</property>

However, a connection error occurs during tajo workers are started.
Error log is as follows.

java.net.ConnectException: Connection refused: *addr:port*
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:597)
        at
org.jboss.netty.channel.socket.nio.NioClientBoss.connect(NioClientBoss.java:150)
        at
org.jboss.netty.channel.socket.nio.NioClientBoss.processSelectedKeys(NioClientBoss.java:105)
        at
org.jboss.netty.channel.socket.nio.NioClientBoss.process(NioClientBoss.java:79)
        at
org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312)
        at
org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)
        at
org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
        at
org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:679)
2013-08-29 13:52:45,678 ERROR worker.TajoWorker
(TajoWorker.java:connectToTajoMaster(276)) - Can't connect to TajoMaster[*
addr:port*], java.net.ConnectException: Connection refused: *addr:port*
*
*
Do you have any solutions?

Thanks,
Jihoon