error in mapreduce execution.

[Nada Saif]

Hi,
what this error means:
" Call From li417-43.members.linode.com/150.110.130.10 to
li417-43.members.linode.com:8020 failed on connection exception:
java.net.ConnectException: Connection refused; For more details see:
http://wiki.apache.org/hadoop/ConnectionRef";

Thanks