mapreduce - Hadoop error -"connection refused"? -

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i got following error in hadoop cluster . ran job ,and long , couldn't finish . whenever try access hdfs ,i get:

"call li417-43.members.linode.com/174.79.191.40 li417-43.members.linode.com:8020 failed on connection exception: java.net.connectexception: connection refused; more details see: http://wiki.apache.org/hadoop/connectionrefused"

any way solve this!

thanks

from comments: no java processes running , neither namenode nor jobtracker running. particular error 8020 refers namenode: hdfs not up.

depending on version of hadoop may able 

start-dfs.sh start-mapred.sh

or

start-all.sh

after need examine hdfs logs see issues. may post log entries here further assistance.


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