Spring Boot Errors
Common Spring Boot errors and how to fix them.
31 errors🍃 Spring Boot
Port 8080 was already in use
Another process is already bound to port 8080
🍃 Spring Boot
Field X required a bean of type Y that could not be found
Spring tried to inject a dependency but couldn't find a matching bean in the application context.
🍃 Spring Boot
Whitelabel Error Page
Spring Boot's default 404 error page indicating no mapping was found for the request.
🍃 Spring Boot
Failed to configure a DataSource: 'url' attribute is not specified
Spring Boot detected JPA but found no database connection details.
🍃 Spring Boot
Table/relation does not exist
Hibernate is trying to query a table that doesn't exist in your database.
🍃 Spring Boot
CORS error - blocked by CORS policy
Your frontend (Angular/React) is blocked from calling your Spring Boot API.