Changing the Default Port

By default, H2O on Spark starts on the IP of the client node and the first free port starting at 54321. You can specify to use a custom port for H2O using the spark.ext.h2o.client.web.port, as in below. Refer to Sparkling Water Configuration Properties for a complete list of configuration properties.

./bin/sparkling-shell --conf "spark.ext.h2o.client.web.port=443"