We have heard some comments from the community regarding the need to configure AJP Connector in GlassFish. I have gone ahead and expose the AJP Connector parameters in GlassFish so it's easy to configure the connector using a properties file.
Quick blog on how to configure AJP Connector in GlassFish
(1) First, install mod_jk - see Jeanfrancois's blog for more details
(2) Copy three necessary jars from tomcat and jakarta-commons