Tomcat: One or more listeners failed to start

Question

I have an application which is not starting up after I added/upgraded some dependencies. It logs an error saying

SEVERE: One or more listeners failed to start.

Answer 1

Found a simple way to identify the problem.

1. In your WEB-INF/classes directory of the application, make a new file: logging.properties.

2. Add the following in that file:

org.apache.catalina.core.ContainerBase.[Catalina].level=INFO
org.apache.catalina.core.ContainerBase.[Catalina].handlers=java.util.logging.ConsoleHandler

3. Restart tomcat.

Now you'll have the complete stacktrace and debug the problem from there on.