Emeka created YARN-5177:
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Summary: Make Node-Manager Download-Resource Component extensible.
Key: YARN-5177
URL: https://issues.apache.org/jira/browse/YARN-5177
Project: Hadoop YARN
Issue Type: Improvement
Components: nodemanager
Affects Versions: 2.7.0
Reporter: Emeka
Priority: Minor
Problem:
- Downloading files to a local machine/node is called "resource-localization".
- There are two components that perform resource-location (PublicLocalizer and
ComponetLocalizers)
- Both components utilizes FSDownload.class to perform their downloads.
- We need a custom implementation of FSDownload.
Solution:
- With this change, we make FSDownload.class extensible by wrapping it in a new
ResourceDownloader.interface
- We also update the PublicLocalizer and ComponetLocalizers to load
ResourceDownloader rather than FSDownload.
- NOTE: We use reflection to load the right implementation during runtime.
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