IssueTracker

Indexing also runs indefinitely here with Android studio 3.3 and a project that contains a NDK library (native engine + game). Previous versions, for instance 3.2.1, worked fine. Still occurs after clearing the caches and deleting the .idea folder. On a desktop with 32 GB of RAM it's not running out of memory but it indexes forever, pegging an entire CPU and disk access to 100%, and it never stops. The same thing occurs with gradle 4.6 or 4.10. If I enable the experimental scan active configuration only setting, everything is basically broken - no syntax highlighting, cpp files don't show. Waiting to see if there's a workaround before reverting to 3.2.1 and being much more cautious about updating in the future ..

When I let it run for hours, the scanning eventually did complete, then the indexing took more hours, I let it run as well, and eventually it switched to 'building symbols' which also started taking a long time without progress, but that, eventually, crashed Android Studio with an out of memory error, telling me to increase the heap size. I did, and upon restarting Android Studio, it started over at scanning .. so I gave up for now. This is with a mid-size NDK project.

Even after a dirty downgrade to AS 3.2 from 3.3 my project was stuck on scanning files to index and building symbols. I ended up having to fully remove all Android Studio files/folders. After relaunching AS 3.2 and setting heap size to 8GB the scanning, indexing and building symbols took just a couple minutes.

These were the folders I deleted:
rm -rfv ~/Library/Application\ Support/AndroidStudio*
rm -rfv ~/Library/Preferences/AndroidStudio*
rm -rfv ~/Library/Caches/AndroidStudio*
rm -rfv ~/Library/Logs/AndroidStudio*
rm -rfv ~/.AndroidStudio*