Eclipse does a clean build instead of incremental

Question

I have a problem that drives me crazy .: D

I have been working with eclipse (Juno version) for about a year. Suddenly, without me, realizing that if I changed something, every time eclipse builds it, it sees it as a clean build: it removes everything from my output folder, compiles all my class files and then copies the resources.

This is a LOONG time. Before this strange behavior, the collection always took much less time (3 seconds compared to the 4 minutes that it takes now).

• I tried to download the new version of eclipse.
• I tried to copy my project in a new workspace.

• Auto build is NOT selected.

• This is not the case when the assembly performs a clean assembly every time. But it looks like he is trying to make a clean build in 5 minutes or so when I try to build.

Reading the eclipse documentation, it should do an incremental build, detecting only the changes I made, not a clean build. Do you guys know why this is happening?

I GREAT UNDERSTAND ANY help!

Thanks!!!