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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7287) Configuration deprecation mechanism doesn't work properly for GenericOptionsParser/Tools
Date Sat, 21 May 2011 00:21:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13037193#comment-13037193
] 

Todd Lipcon commented on HADOOP-7287:
-------------------------------------

With HDFS-1932 committed the above manual test now passes.

But, one more issue I think before we can commit this: in this test case it doesn't print
any warning about use of the deprecated flag. Would that be easy to address or is it better
to do in another jira?

> Configuration deprecation mechanism doesn't work properly for GenericOptionsParser/Tools
> ----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-7287
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7287
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: conf
>    Affects Versions: 0.22.0, 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Aaron T. Myers
>            Priority: Blocker
>             Fix For: 0.22.0, 0.23.0
>
>         Attachments: hadoop-7287-still-broken.txt, hadoop-7287-testcase.txt, hadoop-7287-trunk.0.patch,
hadoop-7287-trunk.1.patch
>
>
> For example, you can't use -D options on the "hadoop fs" command line in order to specify
the deprecated names of configuration options. The issue is that the ordering is:
> - JVM starts
> - GenericOptionsParser creates a Configuration object and calls set() for each of the
options specified on command line
> - DistributedFileSystem or other class eventually instantiates HdfsConfiguration which
adds the deprecations
> - Some class calls conf.get("new key") and sees the default instead of the version set
on the command line

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