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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1912) [Rumen] Add a driver for Rumen tool
Date Tue, 07 Sep 2010 05:14:33 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12906674#action_12906674
] 

Amar Kamat commented on MAPREDUCE-1912:
---------------------------------------

I suggest that we introduce a new exception (something like {{InvalidArgumentException}})
for handling wrongly passed arguments. This will separate out illegal arguments (like passing
string when float is expected) as compared to 
# insufficient number of arguments i.e compulsory arguments missing
# extra unknown arguments

We can now print usage only for invalid exceptions with a custom message describing what went
wrong. This can be used by TraceBuilder, Folder and also MAPREDUCE-2045. Thoughts?

> [Rumen] Add a driver for Rumen tool 
> ------------------------------------
>
>                 Key: MAPREDUCE-1912
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1912
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: tools/rumen
>    Affects Versions: 0.22.0
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>             Fix For: 0.22.0
>
>         Attachments: mapreduce-1912-v1.1.patch, mapreduce-1912-v1.7.4.patch
>
>
> Rumen, as a tool, has 2 entry points :
> - Trace builder
> - Folder
> It would be nice to have a single driver program and have 'trace-builder' and 'folder'
as its options. 

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