Apache Tomcat's installation will require an Apache/PHP recompile on your server. Acenet strongly suggests processing an Apache/PHP recompile during your server's non peak hours. The reason being because an Apache/PHP recompile may cause sporadic performance issues on your server while it's processing and it takes about an hour for the recompile to complete.
[1] Log into your server's WHM as root.
[2] Click on 'EasyApache (Apache Update)' which is under the 'Software' section.
[3] Ensure 'Previously Saved Config (** DEFAULT **)' is selected.
[5] On the 'Apache Version' page, click the button.
[6] On the 'PHP Version' page, click the button.
[7] On the 'Short Options List' page, check the box next to 'Tomcat'.
[11] Wait for the recompile to complete. (usually takes about an hour)