Learn how to prevent this warning when starting the Symfony server from the CLI.

How to solve Symfony Server Warning: The local web server is already running

In the last days I've been working on a project that uses the Symfony built-in server when working locally. Curiously, the warning message "the local web server is already running" has been appearing sometimes when I tried to start the server, even when I haven't started by myself previously using the following command:

symfony serve

In this short article, I will explain to you how to easily prevent this problem from appearing in your local environment.


Even though you may have not started the server previously, forcing the server to stop will solve the problem. Run the following command:

symfony server:stop

If there was a process active, it should output the number of processed that were stopped (solving the issue):

Symfony Web Server Stop Process

You may now be able to start the server once again and it should work:

symfony serve

Happy coding ❤️!

Senior Software Engineer at Software Medico. Interested in programming since he was 14 years old, Carlos is a self-taught programmer and founder and author of most of the articles at Our Code World.