Configuration should allow storage of null values.
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Key: HADOOP-6228
URL: https://issues.apache.org/jira/browse/HADOOP-6228
Project: Hadoop Common
Issue Type: Bug
Components: conf
Reporter: Hemanth Yamijala
Currently the configuration class does not allow null keys and values. Null
keys don't make sense, but null values may have semantic meaning for some
features. Not storing these values in configuration causes some arguable side
effects. For instance, if a value is defined in defaults, but wants to be
disabled in site configuration by setting it to null, there's no way to do this
currently. Also, no track of keys with null values is recorded. Hence, tools
like dump configuration (HADOOP-6184) would not display these properties.
Does this seem like a sensible use case ?
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