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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-1619) Provide a way to override parent configuration with a delete
Date Mon, 29 Jul 2013 16:17:49 GMT
Christopher Tubbs created ACCUMULO-1619:
-------------------------------------------

             Summary: Provide a way to override parent configuration with a delete
                 Key: ACCUMULO-1619
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1619
             Project: Accumulo
          Issue Type: Bug
            Reporter: Christopher Tubbs
             Fix For: 1.6.0


Per-table configuration options are inherited from a hierarchy of configuration scopes. In
some cases, it would be useful to denote a key as "do not inherit from the parent" (treat
it as though it doesn't exist, possibly falling back on the default if the property is defined
in the default configuration).

In such cases, a property key could be prefixed with a "!" character (as in "NOT") to "unset"
a key that is set with a value in a parent scope.

This ticket removes the previously undocumented restriction that empty string is the same
as a property not being set at all.

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