title: how to run terasort with flink?
body: <p>i just configure my flink cluster (1.0.3 version) and i whanted to run tersort with the flink framework, but its me returned the next erreor, i used this comamnde to run my programm:</p>
  
  <pre><code>/bin/flink run -c --class es.udc.gac.flinkbench.ScalaTeraSort flinkbench-assembly-1.0.jar hdfs://192.168.3.89:8020/teragen/10mo hdfs://192.168.3.89:8020/teragen/rstflink
  </code></pre>
  
  <p>and its me return this :</p>
  
  <pre><code>Cluster configuration: Standalone cluster with JobManager at localhost/127.0.0.1:6123
  Using address localhost:6123 to connect to JobManager.
  JobManager web interface address http://localhost:8081
  Starting execution of program
  2017-06-23 10:28:43,692 INFO  org.apache.hadoop.mapreduce.lib.input.FileInputFormat         - Total input paths to process : 2
  Spent 2278ms computing base-splits.
  Spent 2ms computing TeraScheduler splits.
  Computing input splits took 2281ms
  Sampling 2 splits of 2
  Making -1 from 100000 sampled records
  
  ------------------------------------------------------------
   The program finished with the following exception:
  
  org.apache.flink.client.program.ProgramInvocationException: The main method caused an error.
      at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:545)
      at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:419)
      at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:339)
      at org.apache.flink.client.CliFrontend.executeProgram(CliFrontend.java:831)
      at org.apache.flink.client.CliFrontend.run(CliFrontend.java:256)
      at org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1073)
      at org.apache.flink.client.CliFrontend$2.call(CliFrontend.java:1120)
      at org.apache.flink.client.CliFrontend$2.call(CliFrontend.java:1117)
      at org.apache.flink.runtime.security.HadoopSecurityContext$1.run(HadoopSecurityContext.java:43)
      at java.security.AccessController.doPrivileged(Native Method)
      at javax.security.auth.Subject.doAs(Subject.java:422)
      at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1656)
      at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:40)
      at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1116)
  Caused by: java.lang.NegativeArraySizeException
      at es.udc.gac.flinkbench.terasort.TeraInputFormat$TextSampler.createPartitions(TeraInputFormat.java:103)
      at es.udc.gac.flinkbench.terasort.TeraInputFormat.writePartitionFile(TeraInputFormat.java:183)
      at es.udc.gac.flinkbench.ScalaTeraSort$.main(ScalaTeraSort.scala:49)
      at es.udc.gac.flinkbench.ScalaTeraSort.main(ScalaTeraSort.scala)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:528)
      ... 13 more
  </code></pre>