[MAPREDUCE-5807] Print usage for TeraSort job.

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: examples
• Hadoop Flags: Reviewed
• Assignee: Rohith Sharma K S
• Reporter: Rohith Sharma K S
• Created: 24/Mar/14 10:30
• Updated: 30/Aug/16 01:20
• Resolved: 18/Mar/15 12:02

Description

For new to hadoop, try for getting help mesage for examples jobs provided in mapreduce. These Usage helps them in providing arguements.

terasort job execution does not print Usage message instead throw exception.

./yarn jar ../share/hadoop/mapreduce/hadoop-mapreduce-examples-*.jar terasort
14/03/24 15:34:55 INFO terasort.TeraSort: starting
java.lang.ArrayIndexOutOfBoundsException: 0
at org.apache.hadoop.examples.terasort.TeraSort.run(TeraSort.java:283)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.examples.terasort.TeraSort.main(TeraSort.java:325)
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.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)
at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)
at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
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:212)

Issue Links

• is duplicated by: MAPREDUCE-1557 MapReduce teragen example should print correct error message for invalid inputs. Currently throws ArrayIndexOutOfBoundsException .