On Thu, Jun 15, 2023 at 5:17 PM Joel Griffith <jgrif...@nd.edu.invalid> wrote: > > I'm setting up a JSP webapp on an Ubuntu 22.04 system. The webapp uses > Tomcat 9 proxied through Apache 2, just as described here > <https://tomcat.apache.org/tomcat-9.0-doc/proxy-howto.html> . I'm > recreating a setup that works on an Ubuntu 20.04/Tomcat 9 system, and has > worked in the past for earlier versions of both Ubuntu and Tomcat. > > When I access the page https://localhost/app/foo, I get a 500 Internal > Server Error. The error message is > > java.lang.UnsupportedClassVersionError: > org/eclipse/jdt/internal/compiler/env/INameEnvironment has been compiled by > a more recent version of the Java Runtime (class file version 55.0), this > version of the Java Runtime only recognizes class file versions up to 52.0 > > The exception is > > javax.servlet.ServletException: java.lang.UnsupportedClassVersionError: > org/eclipse/jdt/internal/compiler/env/INameEnvironment has been compiled by > a more recent version of the Java Runtime (class file version 55.0), this > version of the Java Runtime only recognizes class file versions up to 52.0 > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:332) > javax.servlet.http.HttpServlet.service(HttpServlet.java:764) > org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) > > There is no file by any variation of the name `INameEnvironment` in my > webapp code, and that string does not appear in any file. I recognize > Eclipse as a popular IDE, but I don't use it. The full stack trace (which > I can provide if anyone thinks it would be useful) doesn't refer to any > other file I recognize. > > Searching through the Tomcat source code on GitHub, I found the file ` > java/org/apache/jasper/compiler/JDTCompiler.java` that appears to be the > source of the error. This link takes you to the code snippet in question: > > https://github.com/search?q=repo%3Aapache%2Ftomcat%20INameEnvironment&type=code > > Is this a bug? It seems strange that it affects only one system when I've > set up Tomcat 9 on many systems. Is there something on the Ubuntu 22.04 > system that might cause the bug to be thrown that I can fix? > > The Java version on the Ubuntu 22.04 system (localhost) is > ``` > $ java -version > openjdk version "1.8.0_362" > OpenJDK Runtime Environment (build 1.8.0_362-8u362-ga-0ubuntu1~22.04-b09) > OpenJDK 64-Bit Server VM (build 25.362-b09, mixed mode) > ``` > > and the Tomcat version is > ``` > $ java -cp catalina.jar org.apache.catalina.util.ServerInfo > Server version: Apache Tomcat/9.0.58 (Ubuntu) > Server built: Jan 6 1970 15:09:28 UTC > Server number: 9.0.58.0 > OS Name: Linux > OS Version: 5.19.0-38-generic > Architecture: amd64 > JVM Version: 1.8.0_362-8u362-ga-0ubuntu1~22.04-b09 > JVM Vendor: Private Build > ``` > > The Java version on the Ubuntu 20.04 server for which the webapp works is > effectively identical: > ``` > $ java -version > openjdk version "1.8.0_362" > OpenJDK Runtime Environment (build > 1.8.0_362-8u372-ga~us1-0ubuntu1~20.04-b09) > OpenJDK 64-Bit Server VM (build 25.362-b09, mixed mode) > ``` > > and its Tomcat version is > ``` > $ java -cp catalina.jar org.apache.catalina.util.ServerInfo > Server version: Apache Tomcat/9.0.31 (Ubuntu) > Server built: Nov 18 2022 19:07:15 UTC > Server number: 9.0.31.0 > OS Name: Linux > OS Version: 5.4.0-150-generic > Architecture: amd64 > JVM Version: 1.8.0_362-8u372-ga~us1-0ubuntu1~20.04-b09 > JVM Vendor: Private Build > ``` > > Thanks for any help you can give me.
JDT 4.20 (used for compiling generated code from your JSP) would be the last version which supports Java 8. You seem to be using a newer version through your distribution, which now requires Java 11. Rémy > > Joel --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
