Upgrading to Wildfly27.1 causes java.lang.NoClassDefFoundError

[yon lo]

Hey all,

I've been using Wildfly 26.1 when our java application was compiled with Java8.

To my understanding the pre-requisite for Wildfly 27.1 is Java11 so I install Java11 but when I ran Wildfly I get:

ervice Module Loader: java.lang.NoClassDefFoundError: Failed to link /.../ProxyServlet/ProxyServlet (Module "deployment.proxy.war" from Service Module Loader): javax/servlet/http/HttpServlet

is it becuase javax.servlet and jakarta.servlet? how can I make this work?

Thanks!

[James Perkins]

That is not correct. WildFly 27 is Jakarta EE 10 which means you'd need to migrate your application from Jakarta EE 8 (javax based) to Jakarta EE 10 (jakarta based).

[Brian Stansberry]

Hi yon lo,

Please have a look at https://groups.google.com/g/wildfly/c/hVbijKO7do8.

Best regards,

Brian