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Are you facing issues with your `Maven Spring Boot App` failing to start in Visual Studio Code? Discover effective solutions to resolve the `ServletWebServerFactory` error with our comprehensive guide!
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This video is based on the question https://stackoverflow.com/q/75246554/ asked by the user 'user21086690' ( https://stackoverflow.com/u/21086690/ ) and on the answer https://stackoverflow.com/a/75247543/ provided by the user 'life888888' ( https://stackoverflow.com/u/20306007/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting Maven Spring Boot App Failing to Start from VS Code

Have you ever run into the frustrating error of having your Maven Spring Boot Application fail to start while working in Visual Studio Code? This common situation can be particularly daunting, especially if you're concentrating on writing a Java RESTful API. Let's dive into the problem, what causes it, and how to fix it effectively.

The Problem at Hand

When you attempt to run your Spring Boot application using the command:

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You receive a runtime error message like this:

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This indicates an issue with starting the web server embedded in your application. The root cause often lies in the way your application is configured or how you are invoking the SpringApplication.run() method.

Solution Overview

Let's break down the solution into clear, actionable steps to get your Spring Boot application up and running.

Step 1: Fix the Main Application Class

The main method in your Main.java file is crucial for the Spring Boot application to start correctly. Currently, you are calling:

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Instead, you should call the Main class itself. Update your main method to look like this:

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Step 2: Update Your pom.xml File

Next, let’s take a look at the pom.xml file. Your configuration may include unnecessary dependencies that could lead to issues. In this case, you can make the following adjustments:

Remove the spring-boot-starter-tomcat dependency. If your project is configured as a web application, Spring Boot already includes the necessary components for running an embedded Tomcat server with the spring-boot-starter-web.

Here’s the updated version of your pom.xml:

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Step 3: Build and Run Your Application

Once the changes are made, it’s time to build and run your application. Use the following command:

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Step 4: Test Your Application

To verify that your application is working correctly, you can perform a simple test using curl. For example, you can check the endpoint for an employee with the following command:

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Additional Considerations

If you still encounter issues after implementing the above changes, consider the following:

Review your service class and ensure that all dependencies are correctly wired and initialized.

Debug extensively if you’re implementing features such as custom services that may not have been included in your question.

Conclusion

By following these steps, you can resolve the critical errors preventing your Maven Spring Boot application from starting in Visual Studio Code. Remember that incorrect references or unnecessary dependencies in your configuration can lead to significant hurdles. Keep experimenting and testing until you find a configuration that works best for your project. Happy coding!