[TEZ-1498] Usage info is not printed when wrong number of arguments is provided for JoinExample

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.5.0
• Assignee: Jeff Zhang
• Reporter: Jeff Zhang
• Created: 26/Aug/14 04:38
• Updated: 06/Sep/14 01:36
• Resolved: 26/Aug/14 17:57

Description

If no arguments is provided, it should print the usage info rather than throw exception as following

14/08/26 12:36:23 INFO examples.JoinExample: Running JoinExample
java.lang.ArrayIndexOutOfBoundsException: 0
	at org.apache.tez.examples.JoinExample.execute(JoinExample.java:165)
	at org.apache.tez.examples.JoinExample.execute(JoinExample.java:138)
	at org.apache.tez.examples.JoinExample.run(JoinExample.java:112)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
	at org.apache.tez.examples.JoinExample.main(JoinExample.java:94)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)
	at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:145)
	at org.apache.tez.examples.ExampleDriver.main(ExampleDriver.java:59)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:212)