[jira] [Created] (HADOOP-13399) deprecate the Configuration classloader

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

Sangjin Lee created HADOOP-13399:
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             Summary: deprecate the Configuration classloader
                 Key: HADOOP-13399
                 URL: https://issues.apache.org/jira/browse/HADOOP-13399
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: util
            Reporter: Sangjin Lee
            Assignee: Sangjin Lee
            Priority: Critical


Today, anyone can simply call {{Configuration.setClassLoader()}} to set the configuration classloader to any arbitrary classloader. This classloader is then used to get a class or a resource through {{Configuration}} ({{getClass()}} and {{getResource()}}).

In essence, the {{Configuration}} classloader is effectively a globally shared classloader without contract. This is one step worse than TCCL in that regard.

I propose to remove/deprecate {{setClassLoader()}} and {{getClassLoader()}} and simply use TCCL (and then the classloader that loaded the {{Configuration}} class) to load classes and resources.




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