"Unrecongized VM option MaxMetaspaceSize" will be in a Tomcat JVMs catalina.out log when the JVM is using the MaxMetaspaceSize argument and version 7 of Java.

JAVA_HOME=/opt/java7
MaxMetaspaceSize=128M

This occurs because the MaxMetaspaceSize argument was introduced in version 8 of Java. If your Tomcat JVM must use version 7 of Java, then you will want to use the -XX:MaxPermSize argument instead of the MaxMetaspaceSize argument.

-XX:MaxPermSize=128M

If your Tomcat JVM can use version 8 of Java, then you'll want to configure your Tomcat JVM to use version 8 of Java.

JAVA_HOME=/opt/java8