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From "Mike Baranczak (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6948) There's no way to remove a property from a Configuration
Date Mon, 13 Sep 2010 18:34:36 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12908907#action_12908907

Mike Baranczak commented on HADOOP-6948:

Well, "important" is a matter of opinion. 

If you're configuring everything in static XML files (which is the standard way to do it),
then this is irrelevant. If you want to run jobs with configurations created on the fly (which
is what I'm doing) then the inability to remove properties is kind of annoying. And it seems
that this feature should be pretty easy to add, since Configuration is basically a wrapper
around 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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