Accessing the Web UI of a Running Spark Application
You can access the web UI of a running Spark application from a web browser.
To access the web application UI of a running Spark application, open
http://spark_driver_host:4040 in a web
browser. If multiple applications are running on the same host, the web application binds to
successive ports beginning with 4040 (4041, 4042, and so on). The web application is available
only for the duration of the application.