[Dev Tools NG] Possible race condition in code rating generator
When updating a rating while a build of the plugin is ongoing, the following error can be observed:
The project was not built due to "Could not delete '***\workspace\org.fortiss.af3.scheduling\build\org\fortiss\af3\scheduling\utils\.ratings'.". Fix the problem, then try refreshing this project and building it since it may be inconsistent
A probably related problem occurs when trying to delete a .rating file (in this case: an empty rating file, see #3194). In that case, the file could not be deleted, probably because the code rating generator was holding a reference to the file.
(from redmine: issue id 3199, created on 2017-11-28, closed on 2019-02-19)