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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12118) Validate xml configuration files with XML Schema
Date Wed, 24 Jun 2015 21:22:04 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14600173#comment-14600173

Allen Wittenauer commented on HADOOP-12118:

See also HADOOP-7947 .

> Validate xml configuration files with XML Schema
> ------------------------------------------------
>                 Key: HADOOP-12118
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12118
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Christopher Tubbs
> I spent an embarrassingly long time today trying to figure out why the following wouldn't
> {code}
> <property>
>   <key>fs.defaultFS</key>
>   <value>hdfs://localhost:9000</value>
> </property>
> {code}
> I just kept getting an error about no authority for {{fs.defaultFS}}, with a value of
{{file:///}}, which made no sense... because I knew it was there.
> The problem was that the {{core-site.xml}} was parsed entirely without any validation.
This seems incorrect. The very least that could be done is a simple XML Schema validation
against an XSD, before parsing. That way, users will get immediate failures on common typos
and other problems in the xml configuration files.

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