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Date: Thu, 6 Nov 2008 17:11:44 -0800 (PST)
From: "Edward J. Yoon (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Created: (HADOOP-4608) Examples -Driver does not check first
 argument.
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Examples -Driver does not check first argument.
-----------------------------------------------

                 Key: HADOOP-4608
                 URL: https://issues.apache.org/jira/browse/HADOOP-4608
             Project: Hadoop Core
          Issue Type: Bug
          Components: examples
    Affects Versions: 0.18.2
            Reporter: Edward J. Yoon
            Assignee: Edward J. Yoon
             Fix For: 0.18.3


hadoop@vldb ~/hadoop $ bin/hadoop jar hadoop-0.18.2-examples.jar 
An example program must be given as the first argument.
Valid program names are:
  aggregatewordcount: An Aggregate based map/reduce program that counts the words in the input files.
  aggregatewordhist: An Aggregate based map/reduce program that computes the histogram of the words in the input files.
  grep: A map/reduce program that counts the matches of a regex in the input.
  join: A job that effects a join over sorted, equally partitioned datasets
  multifilewc: A job that counts words from several files.
  pentomino: A map/reduce tile laying program to find solutions to pentomino problems.
  pi: A map/reduce program that estimates Pi using monte-carlo method.
  randomtextwriter: A map/reduce program that writes 10GB of random textual data per node.
  randomwriter: A map/reduce program that writes 10GB of random data per node.
  sleep: A job that sleeps at each map and reduce task.
  sort: A map/reduce program that sorts the data written by the random writer.
  sudoku: A sudoku solver.
  wordcount: A map/reduce program that counts the words in the input files.
java.lang.IllegalArgumentException: An example program must be given as the first argument.
        at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:123)
        at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:54)
        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.RunJar.main(RunJar.java:155)
        at org.apache.hadoop.mapred.JobShell.run(JobShell.java:54)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
        at org.apache.hadoop.mapred.JobShell.main(JobShell.java:68)


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