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From "Alejandro Abdelnur (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-8167) Configuration deprecation logic breaks backwards compatibility
Date Wed, 14 Mar 2012 17:08:41 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-8167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alejandro Abdelnur updated HADOOP-8167:
---------------------------------------

      Resolution: Fixed
    Hadoop Flags: Reviewed
          Status: Resolved  (was: Patch Available)

Committed to trunk and branch-0.23
                
> Configuration deprecation logic breaks backwards compatibility
> --------------------------------------------------------------
>
>                 Key: HADOOP-8167
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8167
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: conf
>    Affects Versions: 0.24.0, 0.23.3
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>            Priority: Blocker
>             Fix For: 0.23.3
>
>         Attachments: HADOOP-8167.patch
>
>
> The deprecated Configuration logic works as follows:
> For a dK deprecated key in favor of nK:
> * on set(dK, V), it stores (nK,V)
> * on get(dK) it does a reverseLookup of dK to nK and looks for get(nK)
> While this works fine for single set/get operations, the iterator() method that returns
an iterator of all config key/values, returns only the new keys.
> This breaks applications that did a set(dK, V) and expect, when iterating over the configuration
to find (dK, V).

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