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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-7287) Configuration deprecation mechanism doesn't work properly for GenericOptionsParser/Tools
Date Fri, 13 May 2011 00:30:47 GMT
Configuration deprecation mechanism doesn't work properly for GenericOptionsParser/Tools
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                 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
            Reporter: Todd Lipcon
            Priority: Blocker
             Fix For: 0.22.0
         Attachments: hadoop-7287-testcase.txt

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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