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java.net.UnknownHostException: unknown host: local at org.apache.hadoop.ipc.Client$Connection.<init>(Client.java:195) at org.apache.hadoop.ipc.Client.getConnection(Client.java:850) at org.apache.hadoop.ipc.Client.call(Client.java:720) at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220) at $Proxy4.getProtocolVersion(Unknown Source) at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:359) at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:346) at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:383) at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:314) at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:291) at org.apache.hama.bsp.GroomServer.initialize(GroomServer.java:279) at org.apache.hama.bsp.GroomServer.run(GroomServer.java:600) at java.lang.Thread.run(Thread.java:680)