Is it normal for Intelli J to take a lot of time (almost 12 hours) to update indices for a project? I just installed Intelli J on my machine and imported a rather large Mave
probably - old bug in caching system. it happens in ALL versions, especially if you upgrade your version of IntelliJ or JDK.
To fix it:
1) close the GUI.
2) go to %HOME_DIR%.IntelliJIdeaXXXX\system\caches and delete it
3) start the the GUI again.