Changing the Default Port

By default, H2O on Spark starts on the IP of the client node and on 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"