Starting an Apache Spark cluster
Starting the Server:
To start a standalone master server execute:
$ ./sbin/start-master.shTo start one or more workers and connect them to the master via:
$ ./sbin/start-slave.sh <master-spark-URL>Take a look at this article: Apache Spark Cluster Installation and Configuration Guide
look likes the /opt/spark folder does not have permission to writing into log file give the full permission :- sudo chmod -R 777 /opt/sparkand also check that /opt/spark folder user:group have same value for all the machine (master and slaves both) otherwise run this command sudo chown -R userName:groupName /opt/spark