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From "Ari Rabkin (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-7036) spellcheck for configuration
Date Mon, 15 Nov 2010 22:26:15 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7036?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ari Rabkin updated HADOOP-7036:
-------------------------------

    Attachment: confspellcheck.jar

Jar for spellcheck. Should go in contrib/spellcheck directory.
Source code available from http://code.google.com/p/jchord/source/browse/#svn/trunk/conf_spellchecker/

Available under BSD license 

> spellcheck for configuration
> ----------------------------
>
>                 Key: HADOOP-7036
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7036
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: conf
>            Reporter: Ari Rabkin
>            Assignee: Ari Rabkin
>         Attachments: confspellcheck.jar
>
>
> Hadoop does fairly limited correctness checks of its configuration. I propose a "configuration
spellcheck" that can automatically catch errors, and particularly can catch cases where users
mis-type the name of an option.
> The system works as follows:
> - Use program analysis to extract the set of options supported by each Hadoop version,
annotated when possible with their types into a 'dictionary file'.
> - Distribute these extracted sets, per version.
> - A script that reads a dictionary file, reads the Hadoop config from a specified directory,
and reports deviations. In particular, the system can report when an option is set that Hadoop
will never read or when an invalid value is specified.

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