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

I don't understand why, but the solution from tucuxi's answer doesn't work in my case. In my project there are thousands of files generated by special tool and its recompilation may waste really a lot of time.

I've tried the following plugin configuration (with java level 1.5):

    maven-compiler-plugin
    3.1
    
        1.5
        1.5
        true
    

On a second run, there are no stale files was detected but the plugin recompiled all the project again. It seems that incremental compilation actually disabled by default, and still not working even if useIncrementalCompilation=true specified.

After some googling, I've simply changed useIncrementalCompilation parameter value from "true" to "yes" and this do the trick for me.

@see also stackoverflow.com/a/19653164/1848640