Configuration XML bug: empty values
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                 Key: HADOOP-1347
                 URL: https://issues.apache.org/jira/browse/HADOOP-1347
             Project: Hadoop
          Issue Type: Bug
          Components: conf
    Affects Versions: 0.12.2
            Reporter: Eelco Lempsink
            Priority: Critical


The configuration parser doesn't handle empty values well:

if ("value".equals(field.getTagName()) && field.hasChildNodes())

This logic makes it impossible to 'unset' a field when loading multiple 
configurations.

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