What is the default annotation processors discovery process?

Question

The documentation of Maven Compiler plugin mentions the following:

annotationProcessors:

Names of annotation processors t

Answer 1

The default way to make an annotation processor available to the compiler is to register it in a file in META-INF/services/javax.annotation.processing.Processor. The file can contain a number of processors: each the fully-qualified class name on its own line, with a newline at the end. The compiler will default to using processors found in this way if none are specified.