Unrecognized VM option 'MaxPermSize=512m' when running Zeppelin

When I try to run Zeppelin by either

bin/zeppelin.sh

or

bin/zeppelin-deamon.sh start

I was getting the following error message.

Unrecognized VM option 'MaxPermSize=512m'Error: Could not create the Java Virtual Machine.Error: A fatal exception has occurred. Program will exit.

Java 9 is installed on my system (Ubuntu 16.04).

$ java -version                         openjdk version "9-internal"OpenJDK Runtime Environment (build 9-internal+0-2016-04-14-195246.buildd.src)OpenJDK 64-Bit Server VM (build 9-internal+0-2016-04-14-195246.buildd.src, mixed mode)