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  1. POSuccessful Hadoop job with errors
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    <p>I have set up my first simple Hadoop multi-node cluster(I am a newbie) consisting of two nodes, a master-node(also acting as slave-node) and a dedicated slave-node. I am running a Hadoop "word count" example job, which finishes successfully. Although when i look in the logs i can see an error, this is from TaskTracker log on slave-node:</p> <pre><code> 2013-04-12 00:30:16,436 WARN org.apache.hadoop.mapred.TaskTracker: Failed validating JVM java.io.IOException: JvmValidate Failed. Ignoring request from task: attempt_201304112309_0006_m_000003_0, with JvmId: jvm_201304112309_0006_m_1485441759 at org.apache.hadoop.mapred.TaskTracker.validateJVM(TaskTracker.java:3434) at org.apache.hadoop.mapred.TaskTracker.statusUpdate(TaskTracker.java:3504) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:578) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1393) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1389) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1387) 2013-04-12 00:30:16,515 WARN org.apache.hadoop.mapred.DefaultTaskController: Exit code from task is : 143 2013-04-12 00:30:16,515 INFO org.apache.hadoop.mapred.DefaultTaskController: Output from DefaultTaskController's launchTask follows: 2013-04-12 00:30:16,515 INFO org.apache.hadoop.mapred.TaskController: 2013-04-12 00:30:16,516 INFO org.apache.hadoop.mapred.JvmManager: JVM : jvm_201304112309_0006_m_1485441759 exited with exit code 143. Number of tasks it ran: 1 </code></pre> <p>Do anyone know what happens here? Sorry about the ugly code indentation, i couldn´t figure out how to do it properly, this is my first post.</p>
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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