Error trying to use Native Tomcat 10.x for Coldfusion 10 enterprise

[lawrencen48280106]

Hello.

We want to improve our legacy CF10 with native Tomcat and I got it working with the latest Tomcat version 9 release a few days ago..

As a challenge, I want to try and make it work with Tomcat 10 but came up with this error

...

async.Stockticker@29962b2f')
17-Feb-2021 11:02:48.577 SEVERE [http-nio-8585-exec-1] org.apache.catalina.core.StandardContext.listenerStart Error configuring application listener of class [coldfusion.bootstrap.HttpFlexSessionBootstrap]
	java.lang.NoClassDefFoundError: javax/servlet/http/HttpSessionBindingListener
		at java.base/java.lang.ClassLoader.defineClass1(Native Method)
		at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)

....

where can I start troubleshooting this?

Thanks! 

[lawrencen48280106]

I got that part gone but now I get this error

17-Feb-2021 11:46:02.992 SEVERE [http-nio-8585-exec-10] org.apache.catalina.core.StandardContext.filterStart Exception starting filter [FlashRemotingControlFilter]
	java.lang.ClassCastException: class coldfusion.bootstrap.BootstrapFilter cannot be cast to class jakarta.servlet.Filter (coldfusion.bootstrap.BootstrapFilter is in unnamed module of loader org.apache.catalina.loader.ParallelWebappClassLoader @5db31444; jakarta.servlet.Filter is in unnamed module of loader java.net.URLClassLoader @722c41f4)
		at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:250)
		at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103)
		at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4515)

thoughts?

[BKBK]

Your attempt to improve CF10 with Tomcat 10 is a noble undertaking. However, even if it works, it will likely be unstable. CF10 was originally built on Tomcat 7. So it is too old to integrate properly with the newer Tomcat versions. 

To my mind, the best way to improve ColdFusion with Tomcat is to upgrade to the latest ColdFusion version, namely 2021.