[jira] [Commented] (MAPREDUCE-5807) Print usage for TeraSort job.

["Harsh J (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14364607#comment-14364607 ] 

Harsh J commented on MAPREDUCE-5807:
------------------------------------

[~rohithsharma] - Would you be providing an updated patch on this? I'd also take it if it printed all optional config options in the regular -help itself, not to be too picky, as presently there's zero information.

The enum approach mentioned by Gera sounds nice to maintain and use.

> Print usage for TeraSort job.
> -----------------------------
>
>                 Key: MAPREDUCE-5807
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5807
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: examples
>            Reporter: Rohith
>            Assignee: Rohith
>            Priority: Trivial
>         Attachments: MAPREDUCE-5807.patch
>
>
> 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)



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