I just wanted to say that this bug still exists in the code, based off my work today. Upon first time rebooting the server, it was unable to render any pages with anything more than a 503 error (or sometimes a mostly broken page, if I was lucky).
I fixed the issue with advice from this thread. To summarize it for any future googlers,
On the server, go to
Go to the bottom of the file (capital G if you don't use vi regularly, and press i to begin inserting code)
Comment out the line about "extension=apc.so"
Write in a line about "extension=xcache.so"
Save and quit by pressing Esc -> :wq (enter)
type in "sudo /opt/bitnami/ctlscript.sh restart"
You should be good now!