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Date: Mon, 13 Sep 2010 13:56:32 -0400 (EDT)
From: "Doug Cutting (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-6948) There's no way to remove a property
 from a Configuration
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    [ https://issues.apache.org/jira/browse/HADOOP-6948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12908883#action_12908883 ] 

Doug Cutting commented on HADOOP-6948:
--------------------------------------

Is there an important use-case for removing properties?

> There's no way to remove a property from a Configuration
> --------------------------------------------------------
>
>                 Key: HADOOP-6948
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6948
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf
>    Affects Versions: 0.20.2, 0.21.0
>         Environment: all
>            Reporter: Mike Baranczak
>            Priority: Minor
>
> The Configuration class has a lot of methods for setting properties, but it's impossible to remove a property once it's set. Trying to set it to null results in a NullPointerException, since java.util.Properties doesn't allow null values. When building a Configuration programmatically, this can be a problem. 

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