Framework Error

What This Error Means

This error occurs when Spring Framework is unable to find a constructor for one of its classes, typically a handler adapter or other internal component.

Why It Happens

This error usually happens when there's a mismatch between the expected constructor signature of a Spring class and the actual constructor available in the class. It can also occur when there are multiple constructors with different signatures, and Spring is unable to decide which one to use.

How to Fix It

1. 1To fix this error, ensure that the class being used by Spring has a valid constructor with the correct signature. You may need to add a no-arg constructor to the class, or modify an existing constructor to match the expected signature. If you're using a third-party library, check the library's documentation for any specific requirements or restrictions on constructor usage.

Example Code Solution

public class MyController { private MyService service; public MyController() { }

public class MyController { private MyService service; public MyController(MyService service) { this.service = service; } }