[jira] [Created] (YARN-8763) Add WebSocket logic to the Node Manager web server to establish servlet

["Zian Chen (JIRA)" <ji...@apache.org>]

Zian Chen created YARN-8763:
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             Summary: Add WebSocket logic to the Node Manager web server to establish servlet
                 Key: YARN-8763
                 URL: https://issues.apache.org/jira/browse/YARN-8763
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Zian Chen
            Assignee: Zian Chen


The reason we want to use WebSocket servlet to serve the backend instead of establishing the connection through HTTP is that WebSocket solves a few issues with HTTP which needed for our scenario,
 # In HTTP, the request is always initiated by the client and the response is processed by the server — making HTTP a unidirectional protocol, while web socket provides the Bi-directional protocol which means either client/server can send a message to the other party.
 # Full-duplex communication — client and server can talk to each other independently at the same time
 # Single TCP connection — After upgrading the HTTP connection in the beginning, client and server communicate over that same TCP connection throughout the lifecycle of WebSocket connection



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