[HADOOP-7287] Configuration deprecation mechanism doesn't work properly for GenericOptionsParser/Tools

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.22.0, 0.23.0
• Fix Version/s: 0.22.0, 0.23.0
• Component/s: conf
• Hadoop Flags: Reviewed
• Assignee: Aaron Myers
• Reporter: Todd Lipcon
• Created: 13/May/11 00:29
• Updated: 15/Nov/11 00:51
• Resolved: 23/May/11 20:32

Description

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

Issue Links

• relates to: HDFS-1932 Ensure that HDFS configuration deprecations are set up in every spot that HDFS configurations are loaded.