Eclipse always Building workspace
I have seen this effect with an ant-based build before.
You probably have something in your maven build that outputs to one of the source folders or one of it subdirectories. Eclipse detects that a file has changed and starts a new build.
I just disabled my project to build automatically. Really annoying to be in that endless loop.
Goto:
Project->Build automatically
In Eclipse, I had to disable Preferences -> Workspace -> Refresh on access
thanks to Rudy Vissers comment that put me on the right way.