I don't think there is an upper limit. I know 17 works for us, but your mileage may vary depending on your app libraries, etc.
On Tue, Nov 21, 2023, 15:49 Campbell, Lance <la...@illinois.edu> wrote: > Thanks so much. > One last question. If I want to use javax.serlet.* then what is the > highest version of Java I should use? > > Thanks, > > Lance > > -----Original Message----- > From: Robert Turner <rtur...@e-djuster.ca> > Sent: Tuesday, November 21, 2023 2:36 PM > To: Tomcat Users List <users@tomcat.apache.org> > Subject: Re: Issue Migrating servlets to 10.1 > > Tomcat 10.x and higher require Jakarta namespaces versions of the Servlet > specifications. > Tomcat 9.x is the last Tomcat support javax.servlet namespaces. > > Refer to the Which Version page for Tomcat for details: > > https://urldefense.com/v3/__https://tomcat.apache.org/whichversion.html__;!!DZ3fjg!4VB2wQDqugXc0S2euhB5gcgb0Cu6xk-8SLRK_GwqXTxu2U6M3PLo_zrv8d_LmTAOeY0pUCw2GMYHX0pcXv1cMQ$ > > On Tue, Nov 21, 2023 at 3:30 PM Campbell, Lance <la...@illinois.edu> > wrote: > > > I am migrating from Java 8 tomcat 9 to Java 11 tomcat 10.1 . > > > > I am getting a cast class exception when trying to access my login > > servlet. In my servlets I am using these packages: > > > > > > import javax.servlet.ServletException; > > > > import javax.servlet.http.HttpServlet; > > > > import javax.servlet.http.HttpServletRequest; > > > > import javax.servlet.http.HttpServletResponse; > > > > > > 1. Does either Java 11 or Tomcat 10.1 require that I use > > Jakarta.servlet.* packages instead of javax.servlet.*? > > 2. If that is the case, then what is specifically requiring this? > > Is it Java 11 or Tomcat 10.1 or both? > > > > My servlet is getting this error: > > > > 21-Nov-2023 14:14:52.768 INFO [main] > > org.apache.catalina.core.ApplicationContext.log Marking servlet > > [LoginServlet] as unavailable > > 21-Nov-2023 14:14:52.769 SEVERE [main] > > org.apache.catalina.core.StandardContext.loadOnStartup Servlet > > [LoginServlet] in web application [] threw load() exception > > java.lang.ClassCastException: class xyz.servlet.LoginServlet > > cannot be cast to class jakarta.servlet.Servlet > > (xyz.servlet.LoginServlet is in unnamed module of loader > > org.apache.catalina.loader.ParallelWebappClassLoader > > @2ccca26f; jakarta.servlet.Servlet is in unnamed module of loader > > java.net.URLClassLoader @63e2203c) > > > > Thanks, > > > > Lance > > >
