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From "Konstantin Boudnik (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-7036) spellcheck for configuration
Date Thu, 16 Dec 2010 05:11:02 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12971963#action_12971963
] 

Konstantin Boudnik commented on HADOOP-7036:
--------------------------------------------

I'd rather agree with you about the overhead. Unfortunately, this is how things have became
after 3-way split we have experienced a couple of years ago. Perhaps, Eli point make sense
and it would be a good idea to put it as a separate project under Apache license with its
own artifact to github?

> 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, hadoopSpellcheck.patch
>
>
> 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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