An AbstractMethodError is a java exception thrown when a class attempts to call an abstract method of another class. This type of error doesn't occur often because attempts to call an abstract method are usually found by the compiler at runtime.
An AbstractMethodError is a java exception class extending IncompatibleClassChangeError. It's thrown when a method attempts to call an abstract method, and it goes unnoticed until runtime. Usually this is found at compile time, but when the definition of another class has changed since the last compilation, this may end up being thrown. For more information, see the official documentation for AbstractMethodError
