[HADOOP-4608] Examples -Driver does not check first argument.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.18.2
• Fix Version/s: 0.20.0
• Hadoop Flags: Reviewed
• Assignee: Edward J. Yoon
• Reporter: Edward J. Yoon
• Created: 07/Nov/08 01:11
• Updated: 08/Jul/09 17:06
• Resolved: 13/Nov/08 22:39

Description

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)