title: I have some problems when I test hadoop multi node cluster
body: <p><strong>Hi
  I'm using hadoop 0.23.9 with 2 node
  when I tried the singel node it works fine but
  when i try to test word count job I get the following result and I don't knew where the error</strong></p>
  
  <p>I use ubuntu 12.04 LTS in both PCs</p>
  
  <pre><code>        mapred-site.xml
  
  
          &lt;property&gt;
          &lt;name&gt;mapreduce.framework.name&lt;/name&gt;
          &lt;value&gt;yarn&lt;/value&gt;
          &lt;/property&gt;
  
          &lt;/configuration&gt;
  
           yarn-site.xml
  
  
  &lt;configuration&gt;
  &lt;property&gt;
    &lt;name&gt;yarn.nodemanager.aux-services&lt;/name&gt;
    &lt;value&gt;mapreduce.shuffle&lt;/value&gt;
    &lt;/property&gt;
  &lt;property&gt;
  &lt;name&gt;yarn.resourcemanager.resource-tracker.address&lt;/name&gt;
  &lt;value&gt;master:8031&lt;/value&gt;
  &lt;/property&gt;
  
  &lt;property&gt;
  &lt;name&gt;yarn.resourcemanager.address&lt;/name&gt;
  &lt;value&gt;master:8032&lt;/value&gt;
  &lt;/property&gt;
  
  
   &lt;property&gt;
    &lt;name&gt;mapreduce.framework.name&lt;/name&gt;
    &lt;value&gt;yarn&lt;/value&gt;
    &lt;/property&gt;
  
  &lt;property&gt;
   &lt;name&gt;mapreduce.job.tracker&lt;/name&gt;
    &lt;value&gt;master&lt;/value&gt;
   &lt;/property&gt;
  &lt;configuration&gt;
  
  &lt;property&gt;
    &lt;name&gt;yarn.nodemanager.aux-services&lt;/name&gt;
    &lt;value&gt;mapreduce.shuffle&lt;/value&gt;
    &lt;/property&gt;
  
  
  
  
  &lt;property&gt;
  &lt;name&gt;yarn.resourcemanager.scheduler.address&lt;/name&gt;
  &lt;value&gt;master:8030&lt;/value&gt;
  &lt;/property&gt;
  
  &lt;property&gt;
  &lt;name&gt;yarn.resourcemanager.address&lt;/name&gt;
  &lt;value&gt;master:8032&lt;/value&gt;
  &lt;/property&gt;
  
  &lt;property&gt;
  &lt;name&gt;yarn.nodemanager.address&lt;/name&gt;
  &lt;value&gt;0.0.0.0:8042&lt;/value&gt;
  &lt;/property&gt;
  
  &lt;/configuration&gt;
  </code></pre>
  
  <p>and here the hosts file of ubuntu </p>
  
  <pre><code>    127.0.0.1       localhost
      127.0.1.1       fatima1-HP-ProBook-4530s
  
  192.168.1.10    master
  192.168.1.11    slave
  
  #the following lines are desirable for IPv6 capable hosts
  ::1     ip6-localhost ip6-loopback
  fe00::0 ip6-localnet
  ff00::0 ip6-mcastprefix
  ff02::1 ip6-allnodes
  ff02::2 ip6-allrouters
  
  
  
  
  
  
  
  
  
          14/04/25 15:41:39 INFO input.FileInputFormat: Total input paths to process : 7
          14/04/25 15:41:39 WARN snappy.LoadSnappy: Snappy native library not loaded
          14/04/25 15:41:39 INFO mapreduce.JobSubmitter: number of splits:7
          14/04/25 15:41:39 WARN conf.Configuration: mapred.jar is deprecated. Instead, use mapreduce.job.jar
          14/04/25 15:41:39 WARN conf.Configuration: mapred.output.value.class is deprecated.    Instead, use mapreduce.job.output.value.class
          14/04/25 15:41:39 WARN conf.Configuration: mapreduce.combine.class is deprecated. Instead, use mapreduce.job.combine.class
          14/04/25 15:41:39 WARN conf.Configuration: mapreduce.map.class is deprecated. Instead, use mapreduce.job.map.class
          14/04/25 15:41:39 WARN conf.Configuration: mapred.job.name is deprecated. Instead, use mapreduce.job.name
          14/04/25 15:41:39 WARN conf.Configuration: mapreduce.reduce.class is deprecated. Instead, use mapreduce.job.reduce.class
          14/04/25 15:41:39 WARN conf.Configuration: mapred.input.dir is deprecated. Instead, use mapreduce.input.fileinputformat.inputdir
          14/04/25 15:41:39 WARN conf.Configuration: mapred.output.dir is deprecated. Instead, use mapreduce.output.fileoutputformat.outputdir
          14/04/25 15:41:39 WARN conf.Configuration: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps
          14/04/25 15:41:39 WARN conf.Configuration: mapred.output.key.class is deprecated. Instead, use mapreduce.job.output.key.class
          14/04/25 15:41:39 WARN conf.Configuration: mapred.working.dir is deprecated. Instead, use mapreduce.job.working.dir
          14/04/25 15:41:39 INFO mapred.ResourceMgrDelegate: Submitted application application_1398429615167_0001 to ResourceManager at master/192.168.1.10:8032
          14/04/25 15:41:39 INFO mapreduce.Job: The url to track the job: `http://master:8088/proxy/application_1398429615167_0001/`
          14/04/25 15:41:39 INFO mapreduce.Job: Running job: job_1398429615167_0001
          14/04/25 15:41:46 INFO mapreduce.Job: Job job_1398429615167_0001 running in uber mode : false
          14/04/25 15:41:46 INFO mapreduce.Job:  map 0% reduce 0%
          14/04/25 15:41:47 INFO mapreduce.Job: Task Id : attempt_1398429615167_0001_m_000006_0, Status : FAILED
      Container launch failed for container_1398429615167_0001_01_000008 : java.lang.reflect.UndeclaredThrowableException
          at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagerPBClientImpl.startContainer(ContainerManagerPBClientImpl.java:111)
          at org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$Container.launch(ContainerLauncherImpl.java:157)
          at org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$EventProcessor.run(ContainerLauncherImpl.java:396)
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
          at java.lang.Thread.run(Thread.java:724)
      Caused by: com.google.protobuf.ServiceException: java.net.UnknownHostException: Invalid host name: local host is: (unknown); destination host is: ""fatima-HP-ProBook-4520s":45527; java.net.UnknownHostException; For more details see:  `http://wiki.apache.org/hadoop/UnknownHost`
          at org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine$Invoker.invoke(ProtoOverHadoopRpcEngine.java:144)
          at com.sun.proxy.$Proxy28.startContainer(Unknown Source)
          at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagerPBClientImpl.startContainer(ContainerManagerPBClientImpl.java:104)
      ... 5 more
  Caused by: java.net.UnknownHostException: Invalid host name: local host is: (unknown); destination host is: ""fatima-HP-ProBook-4520s":45527; java.net.UnknownHostException; For more details see:  `http://wiki.apache.org/hadoop/UnknownHost`
      at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:713)
      at org.apache.hadoop.ipc.Client$Connection.&lt;init&gt;(Client.java:238)
      at org.apache.hadoop.ipc.Client.getConnection(Client.java:1194)
      at org.apache.hadoop.ipc.Client.call(Client.java:1074)
      at org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine$Invoker.invoke(ProtoOverHadoopRpcEngine.java:141)
      ... 7 more
  Caused by: java.net.UnknownHostException
      ... 11 more
  
  14/04/25 15:41:49 INFO mapreduce.Job: Task Id : attempt_1398429615167_0001_m_000006_1, Status : FAILED
  Container launch failed for container_1398429615167_0001_01_000009 : java.lang.reflect.UndeclaredThrowableException
      at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagerPBClientImpl.startContainer(ContainerManagerPBClientImpl.java:111)
      at org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$Container.launch(ContainerLauncherImpl.java:157)
      at org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$EventProcessor.run(ContainerLauncherImpl.java:396)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at java.lang.Thread.run(Thread.java:724)
  Caused by: com.google.protobuf.ServiceException: java.net.UnknownHostException: Invalid host name: local host is: (unknown); destination host is: ""fatima-HP-ProBook-4520s":45527; java.net.UnknownHostException; For more details see:  `http://wiki.apache.org/hadoop/UnknownHost`
      at org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine$Invoker.invoke(ProtoOverHadoopRpcEngine.java:144)
      at com.sun.proxy.$Proxy28.startContainer(Unknown Source)
      at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagerPBClientImpl.startContainer(ContainerManagerPBClientImpl.java:104)
      ... 5 more
  Caused by: java.net.UnknownHostException: Invalid host name: local host is: (unknown); destination host is: ""fatima-HP-ProBook-4520s":45527; java.net.UnknownHostException; For more details see:  http://wiki.apache.org/hadoop/UnknownHost
      at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:713)
      at org.apache.hadoop.ipc.Client$Connection.&lt;init&gt;(Client.java:238)
      at org.apache.hadoop.ipc.Client.getConnection(Client.java:1194)
      at org.apache.hadoop.ipc.Client.call(Client.java:1074)
      at org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine$Invoker.invoke(ProtoOverHadoopRpcEngine.java:141)
      ... 7 more
  Caused by: java.net.UnknownHostException
      ... 11 more
  
  14/04/25 15:41:51 INFO mapreduce.Job: Task Id : attempt_1398429615167_0001_m_000006_2, Status : FAILED
  Container launch failed for container_1398429615167_0001_01_000010 : java.lang.reflect.UndeclaredThrowableException
      at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagerPBClientImpl.startContainer(ContainerManagerPBClientImpl.java:111)
      at org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$Container.launch(ContainerLauncherImpl.java:157)
      at org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$EventProcessor.run(ContainerLauncherImpl.java:396)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at java.lang.Thread.run(Thread.java:724)
  Caused by: com.google.protobuf.ServiceException: java.net.UnknownHostException: Invalid host name: local host is: (unknown); destination host is: ""fatima-HP-ProBook-4520s":45527; java.net.UnknownHostException; For more details see:  `http://wiki.apache.org/hadoop/UnknownHost`
      at org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine$Invoker.invoke(ProtoOverHadoopRpcEngine.java:144)
      at com.sun.proxy.$Proxy28.startContainer(Unknown Source)
      at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagerPBClientImpl.startContainer(ContainerManagerPBClientImpl.java:104)
      ... 5 more
  Caused by: java.net.UnknownHostException: Invalid host name: local host is: (unknown); destination host is: ""fatima-HP-ProBook-4520s":45527; java.net.UnknownHostException; For more details see:  `http://wiki.apache.org/hadoop/UnknownHost`
      at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:713)
      at org.apache.hadoop.ipc.Client$Connection.&lt;init&gt;(Client.java:238)
      at org.apache.hadoop.ipc.Client.getConnection(Client.java:1194)
      at org.apache.hadoop.ipc.Client.call(Client.java:1074)
      at org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine$Invoker.invoke(ProtoOverHadoopRpcEngine.java:141)
      ... 7 more
  Caused by: java.net.UnknownHostException
      ... 11 more
  
  14/04/25 15:41:53 INFO mapreduce.Job:  map 14% reduce 0%
  14/04/25 15:41:53 INFO mapreduce.Job: Job job_1398429615167_0001 failed with state FAILED due to: Task failed task_1398429615167_0001_m_000006
  Job failed as tasks failed. failedMaps:1 failedReduces:0
  
  14/04/25 15:41:53 INFO mapreduce.Job: Counters: 5
      Job Counters 
          Launched map tasks=6
          Other local map tasks=3
          Data-local map tasks=7
          Total time spent by all maps in occupied slots (ms)=0
          Total time spent by all reduces in occupied slots (ms)=0
  </code></pre>