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https://issues.apache.org/jira/browse/HADOOP-9668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13708227#comment-13708227
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Kousuke Saruta commented on HADOOP-9668:
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OK. I agree.
> Configuration#iterator method should interpret variables in a property as
> well as Configuration#get method
> ----------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-9668
> URL: https://issues.apache.org/jira/browse/HADOOP-9668
> Project: Hadoop Common
> Issue Type: Bug
> Components: conf
> Affects Versions: 2.1.0-beta, 1.2.1
> Reporter: Kousuke Saruta
> Priority: Minor
> Labels: newbie
>
> o.a.h.conf.Configuration#get method interpret variables in a property in
> *-site.xml but Configuration#iterator method doesn't.
> For example, when a property "user.name" is set to "hadoop" and another
> property "hadoop.tmp.dir" is set to "/tmp/${user.name}", Configuration#get
> interpret "hadoop.tmp.dir" as "/tmp/hadoop" but Configuration#iterator
> doesn't interpret.
> I think Configuration#iterator should interpret variables or if there are
> some reasons, it should be documented that Configuration#iterator doesn't
> interpret variables.
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