[jira] [Commented] (HADOOP-8167) Configuration deprecation logic breaks backwards compatibility

["Hudson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-8167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13425716#comment-13425716 ] 

Hudson commented on HADOOP-8167:
--------------------------------

Integrated in Hadoop-Hdfs-0.23-Build #330 (See [https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/330/])
    svn merge -c 1301551,1300642,1332821,1303884 FIXES:MAPREDUCE-4010,HADOOP-8167,HADOOP-8172,HADOOP-8197 Patches to fix OOZIE-761 (Revision 1367102)

     Result = SUCCESS
bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1367102
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
* /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestConfigurationDeprecation.java
* /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestDeprecatedKeys.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestWritableJobConf.java

                
> 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: 0.23.3, 0.24.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>            Priority: Blocker
>             Fix For: 0.23.3, 2.0.0-alpha
>
>         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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