Tomcat - Failed to start component when versions don't conflict

Question

I'm trying to work with servlets, so I created a Java EE project on a Tomcat server. As you can see below, I have an environment variable JAVA_HOME, which holds the path to JDK 10. The Java version also defaults to 10, however when I start my Tomcat server, I get the highlighted error.

The problem arose after I created a servlet and tried to map it like in the screenshot below.

In my project I also use the 10th version of Java. I don't quite get what the problem is here, so any hint would help.

P.S.: similar questions like this one did not solve my problem

Which version of Tomcat are you using? It looks like you are using IntelliJ. Did you follow https://www.jetbrains.com/help/idea/creating-and-running-your-first-java-ee-application.html? — Arvind Kumar Avinash, Jul 09 '20 at 14:25
@ArvindKumarAvinash yes, I am using Intellij. The Tomcat version is 8.5.57 — Hidayat Rzayev, Jul 09 '20 at 14:27
@ArvindKumarAvinash please take a look at the edits I've made to the question — Hidayat Rzayev, Jul 09 '20 at 14:31

score 1 · Accepted Answer · answered Jul 09 '20 at 14:36

1

The URL pattern must start with a /.

Replace

<url-pattern>add</url-pattern>

with

<url-pattern>/add</url-pattern>

answered Jul 09 '20 at 14:36

Arvind Kumar Avinash

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Tomcat - Failed to start component when versions don't conflict

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