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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6948) There's no way to remove a property from a Configuration
Date Sat, 19 Feb 2011 21:46:39 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12996883#comment-12996883
] 

Hadoop QA commented on HADOOP-6948:
-----------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12454518/HADOOP-6948.patch
  against trunk revision 1071364.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

    +1 system test framework.  The patch passed system test framework compile.

Test results: https://hudson.apache.org/hudson/job/PreCommit-HADOOP-Build/259//testReport/
Findbugs warnings: https://hudson.apache.org/hudson/job/PreCommit-HADOOP-Build/259//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://hudson.apache.org/hudson/job/PreCommit-HADOOP-Build/259//console

This message is automatically generated.

> 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
>            Assignee: Mike Baranczak
>            Priority: Minor
>         Attachments: HADOOP-6948.patch
>
>
> 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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