Hi, I filed this issue a few months ago and haven't had any response yet: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=883862
In short, if you rebuild the maven family of packages on Debian Stretch, the resulting packages are subtly broken and will then cause eclipse (and other packages?) to fail to build. (The packages in the current debian binary archive are OK though, as they were built a long time ago, so this only affects those who rebuild from source and then use those rebuilt binaries) I'm not experienced with Java/maven and that means that trying to step forward diagnosing this takes me a long time. I'd really appreciate any well-informed suggestions that will help me generate useful diagnostic info that would lead to solving the bug. Thanks, Daniel