When i try to start the Scala REPL shell i get the following error
bash: scala: command not found
Also when try to open Spark shell , I am getting the below error, please fix asap,
17/11/22 11:54:27 ERROR SparkUI: Failed to bind SparkUI
java.net.BindException: Address already in use: Service ‘SparkUI’ failed after 16 retries! Consider explicitly setting the appropriate port for the service ‘SparkUI’ (for example spark.ui.port for SparkUI) to an available port or increasing spark.port.maxRetries.