I build environment according to the video, but when performing wordcount encounter this problem:
[root @ 127 hadoop - 1.2.1] # bin/hadoop jar hadoop - examples - 1.2.1. Jar wordcount in out
14/08/17 21:23:19 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried 0 time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:20 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried 1 time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:21 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried 2 time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:22 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried 3 time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:23 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried 4 time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:24 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried 5 time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:25 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried 6 time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:26 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried 7 time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:27 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried eight time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:28 INFO ipc. Client: Retrying the connect to server: 192.168.30.131/192.168.30.131:9001. Already tried nine time (s); Retry the policy is RetryUpToMaximumCountWithFixedSleep (maxRetries=10, sleepTime=1 SECONDS)
14/08/17 21:23:28 ERROR security. UserGroupInformation: PriviledgedActionException as: root cause:java.net.ConnectException: Call to 192.168.30.131/192.168.30.131:9001 failed on connection exception: java.net.ConnectException: connection refused
Java.net.ConnectException: Call to 192.168.30.131/192.168.30.131:9001 failed on connection exception: java.net.ConnectException: connection refused
At org, apache hadoop. Ipc. Client. WrapException (1142). The Client Java:
At org, apache hadoop. Ipc. Client. Call (1118). The Client Java:
At org, apache hadoop. Ipc. RPC $Invoker. Invoke (RPC) Java: 229)
At org, apache hadoop. Mapred. $Proxy2. GetProtocolVersion (Unknown Source)
At sun. Reflect. NativeMethodAccessorImpl. Invoke0 (Native Method)
At sun. Reflect. NativeMethodAccessorImpl. Invoke (NativeMethodAccessorImpl. Java: 62)
At sun. Reflect. DelegatingMethodAccessorImpl. Invoke (43) DelegatingMethodAccessorImpl. Java:
The at Java. Lang. Reflect. Method. Invoke (483) Method. The Java:
At org, apache hadoop. IO. Retry. RetryInvocationHandler. InvokeMethod (RetryInvocationHandler. Java: 85)
At org, apache hadoop. IO. Retry. RetryInvocationHandler. Invoke (RetryInvocationHandler. Java: 62)
At org, apache hadoop. Mapred. $Proxy2. GetProtocolVersion (Unknown Source)
At org, apache hadoop. Ipc. RPC. CheckVersion (RPC) Java: 422)
At org, apache hadoop. Mapred. JobClient. CreateProxy (JobClient. Java: 559)
At org, apache hadoop. Mapred. JobClient. Init (JobClient. Java: 498)
At org, apache hadoop. Mapred. JobClient. & lt; init> (JobClient. Java: 479)
At org, apache hadoop. Graphs. The Job at $1. The run (563) Job. Java:
The at Java. Security. The AccessController. DoPrivileged (Native Method)
At javax.mail. Security. Auth. Subject. The doAs (422) Subject. Java:
At org, apache hadoop. Security. UserGroupInformation. DoAs (UserGroupInformation. Java: 1190)
At org, apache hadoop. Graphs. Job. Connect (561) Job. Java:
At org, apache hadoop. Graphs. Job. Submit (549) Job. Java:
At org, apache hadoop. Graphs. Job. WaitForCompletion (580) Job. Java:
At org, apache hadoop. Examples. WordCount. Main (WordCount. Java: 82)
At sun. Reflect. NativeMethodAccessorImpl. Invoke0 (Native Method)
At sun. Reflect. NativeMethodAccessorImpl. Invoke (NativeMethodAccessorImpl. Java: 62)
At sun. Reflect. DelegatingMethodAccessorImpl. Invoke (43) DelegatingMethodAccessorImpl. Java:
The at Java. Lang. Reflect. Method. Invoke (483) Method. The Java:
At org, apache hadoop. Util. ProgramDriver $ProgramDescription. Invoke (ProgramDriver. Java: 68)
At org, apache hadoop. Util. ProgramDriver. Driver (139) ProgramDriver. Java:
At org, apache hadoop. Examples. ExampleDriver. Main (64) ExampleDriver. Java:
At sun. Reflect. NativeMethodAccessorImpl. Invoke0 (Native Method)
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