Maven compiler plugin always detecting a set of sources as “stale”

Question

FIXED: this is a known bug in maven-compiler-plugin 3.1

I am converting an ant-based build of a 1000+ java-sources project to maven. So far so good, but every time l

Answer 1

Maven may show a message like:

[INFO] Changes detected - recompiling the module!

Because you have an empty java file (or all commented out) in the project that never compiles into a class file.

You can identify the reason why maven rebuilds by running maven with -X. Look near the above message.