How to clear the IntelliJ project index?

Question

I've run into trouble that makes me suspect there is a bad index file that needs to be cleared. The symptoms are:

• Cmd+N will only find a subset of classes in the project
• Trying to run JUnit test on a package won't find the test classes in that package.

Before suspecting a bad index I reinstalled IntelliJ 8.1.3, then I removed and re-checked out the source code. It didn't help. Only after checking out the code into a different folder did IntelliJ start working correctly again, but only for the new project folder. The old project folder is still infected.

So where is that index and how do I clear it?

Answer 1

File | Invalidate Caches, restart. Or manually delete the following folders:

Linux/Windows:

• USER_HOME/.IntelliJIdeaXX/system

Mac:

• ~/Library/Caches/IntelliJIDEAXX

(where XX is your IDEA version).

See the FAQ for more details and folder locations of the other IntelliJ IDEA platform based products.