Detecting File Leak in the Kotlin Daemon
File handle leaks are notoriously difficult to debug, so much so that most of the “fixes” for them are “increase the file descriptor limit”. However, this is not a fix. This is as close as you can get to covering your ears and closing your eyes, then screaming “I CAN’T HEAR YOU” to a bug. The file handle leak will still exist, but now it’s ignored.
In this case study, I decided to take the approach of finding out why the leak was occurring, and finding the best fix for it.