Invalidate caches
IntelliJ IDEA caches a great number of files, therefore the system cache may become overloaded. Sometimes the caches will never be needed again, for example, if you work with frequent short-term projects.
When you invalidate the cache, IntelliJ IDEA rebuilds all projects ever run in the current version of the IDE.
Clear the system cache
From the main menu, select .
In the Invalidate Caches dialog, select an action. You can invalidate the caches and restart the IDE, invalidate the caches without restarting the IDE, or just restart the IDE.
Last modified: 15 April 2020