JSP changes need to restart the application server to take effect?

The version of PLM has been upgraded from 2013 to 2016, and the war package deployed to the application server Tomee has been updated, and today, when hot fix a JSP page on a Linux server, the change did not take effect, to restart Tomee to take effect, I wondered about it. The configuration of the servlet in Web. XML has a parameter that solves this problem:

    <servlet>        <servlet-name>jsp</servlet-name>        <servlet-class> org.apache.jasper.servlet.jspservlet</servlet-class>        <init-param>            <param-name> Development</param-name>            <param-value>true</param-value>        </init-param >    </servlet>

Change the above value from false to True, restart Tomee, sure enough.

JSP changes need to restart the application server to take effect?