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https://issues.apache.org/jira/browse/HADOOP-7036?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ari Rabkin updated HADOOP-7036:
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Attachment: hadoopSpellcheck.patch
Includes dictionary files for (and was tested with) 0.20.2 and 0.21.0
> 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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