Error 404 Not Found when I am using Tomcat WAR file-CodePudding

I am working on a project in Tomcat , Java EE and added a WebSocket to a project and created a simple chat with it.

Locally everything worked fine but when I created the WAR file and launched the application with it, the WebSocket part of the project causes the following error:

I am using 9.0.38 Tomcat version.

Apart from this one problem, the whole app works fine.

Do you have an idea how to fix it?

CodePudding user response：

What's look like your Websocket dependency in your pom.xml file?

The scope of WebSocket dependency must be provided if already isn't:

<!-- https://mvnrepository.com/artifact/javax.websocket/javax.websocket-api -->
<dependency>
    <groupId>javax.websocket</groupId>
    <artifactId>javax.websocket-api</artifactId>
    <version>1.1</version>
    <scope>provided</scope>
</dependency>

CodePudding user response：

I used dependency javax.websocket, but it turned out that the problem was only with my Mozilla Firefox browser. If someone also had this problem, I recommend checking it on Chrome or Edge because it worked for me.

I still don't know what the problem with Firefox is, but in my case I don't have to solve it - it's important that it works on other browsers.

Thank you Mehdi Rahimi for your help.