Spontaneous crash

Our Janus server, after running just fine for months crashed. Fortunately it restarted without incident, but we lost a number of connections during the event.
I’m running on AWS EC2 with apache front end, and I’m using the canyan docker image, Janus version 1.01.
As I said, it’s been chugging along in production for months and it just stopped. There’re no errors in the log, no Bye statement either, so I know it didn’t shut down correctly, there’s just the start up sequence in the log at the time of the crash.

The log doesn’t seem to have any info in it, is there any place else to look for what might have caused it?