56f1136b_Hadoop_Troubleshooting__Possible_Problem
[Symptom] You get a NoRouteToHostException in your logs or in stderr output from a command. [Possible Solution] The only workaround is to pick a new node to replace the unreachable one. Currently, I think that creusa is unreachable, but all other Linux boxes should be okay. None of the Macs will currently work in a cluster. [Possible Problem] 
One of your nodes cannot be reached correctly. This may be a firewall issue, so you should report it to me.
Hadoop Troubleshooting
Possible Problem