The dependencies of some of the beans in the application context form a cycle: studentController ┌─────┐ | studentServiceImpl

The error message "The dependencies of some of the beans in the application context form a cycle" indicates that there is a circular dependency between the beans in the application context. This means that two or more beans are trying to inject each other, resulting in a dependency loop.

To resolve this issue, you can try the following solutions:

1. Update your application to remove the dependency cycle between beans. Identify the beans that are causing the circular dependency and refactor the code to remove the dependency. This can be done by reorganizing the dependencies or introducing an intermediary bean to break the cycle.

2. If you are using Spring Boot 2.6.0 or later, you can enable circular references by adding the following configuration in the application.yml file:

   spring:
     main:
       allow-circular-references: true

However, it is generally not recommended to allow circular dependencies, as they can lead to runtime errors and make the code harder to maintain.

3. Another approach is to use the @Lazy annotation. You can apply this annotation to one of the beans involved in the circular dependency to make it lazily-initialized. This way, the other bean will be initialized first, resolving the circular dependency issue.

Now, here are a few related questions you may have: