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From André Kelpe <efeshundert...@googlemail.com>
Subject Re: Exceptions when establishing RPC
Date Tue, 03 Apr 2012 21:54:04 GMT
Hi Robert!

> Caused by: java.net.ConnectException: Connection refused
> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
> at
> org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
> at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:656)
> at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:434)
> at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:560)
> at org.apache.hadoop.ipc.Client$Connection.access$2000(Client.java:184)
> at org.apache.hadoop.ipc.Client.getConnection(Client.java:1202)
> at org.apache.hadoop.ipc.Client.call(Client.java:1046)
> ... 25 more

You are running on EC2. Did you make sure that your security group
allows all instances in the same group to connect to each other on any
port? It seems that the internal firewall of amazon is blocking things
for you.

André

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