I think the problem might be Tomcat expecting jakarta namespace not javax
namespace.
09-Apr-2025 20:36:56.025 FINE [main]
org.apache.catalina.util.Introspection.loadClass Failed to load class
[com.webbtide.test.server.GreetingServiceImpl]
java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet
In Tomcat lib directory:
/opt/java/bin/jar -tvf servlet-api.jar | grep HttpServlet
223 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServlet$1.class
1235 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServlet$NoBodyAsyncContextListener.class
3491 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServlet$NoBodyOutputStream.class
4233 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServlet$NoBodyPrintWriter.class
4058 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServlet$NoBodyResponse.class
1860 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServlet$TomcatHack.class
9778 Fri Feb 01 00:00:00 AEST 1980 jakarta/servlet/http/HttpServlet.class
297 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServletMapping.class
1052 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServletRequest$1.class
3086 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServletRequest.class
5783 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServletRequestWrapper.class
3708 Fri Feb 01 00:00:00 AEST 1980
jakarta/servlet/http/HttpServletResponse.class
Not sure what to do ?
On Wednesday, April 9, 2025 at 7:12:16 PM UTC+10 bryan wrote:
> Using Eclipse 2025-03 (4.35.0)
> OpenJDK 21.0.2
>
> I created a GWT Web Application and deployed it on Tomcat 10.0.22,
> listening on port 8081.
>
> Tomcat is deployed behind nginx. The relevant lines of the conf are:
> location / {
> expires -1;
>
> add_header Cache-Control "no-store, no-cache, must-revalidate";
>
> proxy_pass http://127.0.0.1:8081;
> proxy_set_header Upgrade $http_upgrade;
> proxy_set_header Connection "upgrade";
> proxy_set_header X-Real-IP $remote_addr;
>
> proxy_set_header Host $host;
> proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
> }
>
> When I point myself are https:[my weburl]/ the GWT Web Application Starter
> Project loads. When I click on the "Send" button the browser debug console
> says:
> POST https://[my web url]/gwttest/greet 500 (Internal Server Error)
>
> Any help greatly appreciated.
>
>
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