Chris Li created HADOOP-10811:
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Summary: Allow classes to be reloaded at runtime
Key: HADOOP-10811
URL: https://issues.apache.org/jira/browse/HADOOP-10811
Project: Hadoop Common
Issue Type: New Feature
Components: conf
Affects Versions: 3.0.0
Reporter: Chris Li
Assignee: Chris Li
Priority: Minor
Currently hadoop loads its classes and caches them in the Configuration class.
Even if the user swaps a class's jar at runtime, hadoop will continue to use
the cached classes when using reflection to instantiate objects. This limits
the usefulness of things like HADOOP-10285, because the admin would need to
restart each time they wanted to change their queue class.
This patch is to add a way to refresh the class cache, by creating a new
refresh handler to do so (using HADOOP-10376)
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