You can use Tomcat 10 if you like, you just need to add the GWT Jakarta
lib: https://mvnrepository.com/artifact/org.gwtproject/gwt-servlet-jakarta
On Wednesday, 9 April 2025 at 9:35:30 pm UTC+10 bryan wrote:
> Solved. Had to deploy on Tomcat 9 and not Tomcat 10.
>
> On Wednesday, April 9, 2025 at 8:54:23 PM UTC+10 bryan wrote:
>
>> 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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