title: Hadoop: Error in configuring object
body: <p>I'm trying to run the Terasort benchmarks and i'm getting the following exception:</p>
  
  <pre><code>java.lang.RuntimeException: Error in configuring object
      at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
      at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
      at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
      at org.apache.hadoop.mapred.MapTask$OldOutputCollector.&lt;init&gt;(MapTask.java:573)
      at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:435)
      at org.apache.hadoop.mapred.MapTask.run(MapTask.java:371)
      at org.apache.hadoop.mapred.Child$4.run(Child.java:259)
      at java.security.AccessController.doPrivileged(Native Method)
      at javax.security.auth.Subject.doAs(Subject.java:396)
      at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
      at org.apache.hadoop.mapred.Child.main(Child.java:253)
  Caused by: java.lang.reflect.InvocationTargetException
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
      ... 10 more
  Caused by: java.lang.IllegalArgumentException: can't read paritions file
      at org.apache.hadoop.examples.terasort.TeraSort$TotalOrderPartitioner.configure(TeraSort.java:213)
      ... 15 more
  Caused by: java.io.FileNotFoundException: File _partition.lst does not exist.
      at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:371)
      at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:245)
      at org.apache.hadoop.fs.FileSystem.getLength(FileSystem.java:720)
      at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1417)
      at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1412)
      at org.apache.hadoop.examples.terasort.TeraSort$TotalOrderPartitioner.readPartitions(TeraSort.java:153)
      at org.apache.hadoop.examples.terasort.TeraSort$TotalOrderPartitioner.configure(TeraSort.java:210)
      ... 15 more
  </code></pre>
  
  <p>The TeraGen commands run fine and have created the input files for TeraSort. Here is the listing of my input directory:</p>
  
  <pre><code>bin/hadoop fs -ls /user/hadoop/terasort-input/Warning: Maximum heap size rounded up to 1024 MB
  Found 5 items
  -rw-r--r--   1 sqatest supergroup           0 2012-01-23 14:13 /user/hadoop/terasort-input/_SUCCESS
  drwxr-xr-x   - sqatest supergroup           0 2012-01-23 13:30 /user/hadoop/terasort-input/_logs
  -rw-r--r--   1 sqatest supergroup         129 2012-01-23 15:49 /user/hadoop/terasort-input/_partition.lst
  -rw-r--r--   1 sqatest supergroup 50000000000 2012-01-23 13:30 /user/hadoop/terasort-input/part-00000
  -rw-r--r--   1 sqatest supergroup 50000000000 2012-01-23 13:30 /user/hadoop/terasort-input/part-00001
  </code></pre>
  
  <p>Here is my command for running the terasort:</p>
  
  <pre><code>bin/hadoop jar hadoop-examples-0.20.203.0.jar terasort -libjars hadoop-examples-0.20.203.0.jar /user/hadoop/terasort-input /user/hadoop/terasort-output
  </code></pre>
  
  <p>I do see the file _partition.lst in my input directory, i dont understand why i am getting the FileNotFoundException. </p>
  
  <p>I followed the setup details provided at: <a href="http://www.michael-noll.com/blog/2011/04/09/benchmarking-and-stress-testing-an-hadoop-cluster-with-terasort-testdfsio-nnbench-mrbench/" rel="noreferrer">http://www.michael-noll.com/blog/2011/04/09/benchmarking-and-stress-testing-an-hadoop-cluster-with-terasort-testdfsio-nnbench-mrbench/</a></p>