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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