hadoop Connection refused no further information

When using eclipse on window to connect to remote hadoop server in Linux.
But when add a new location: Cannot connect to the Map/Reduce location:

Call to 172.18.3.198/172.18.3.198:9001 failed on connection exception: 
java.net.ConnectException: Connection refused: no further information.

Solution

Modify the core-site.xml, mapred-site.xml files for their localhost into the server IP ! Everything is good bless.