Jetty’s Server in Spark Stack

Spark has a web accessible monitoring interface, as well as, several other mechanisms like remoting, and file-serving that use http protocols. Spark uses the Jetty web server, client and java servlet container for these functionalities.

The web UI is started from within the SparkContext class by instantiated a SparkUI class, which is sub-class of the WebUI class. WebUI uses Spark utility and Jetty utility functions to spin up the web server and attach handlers to server web content.

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