Only the integrated server crashed. I am unsure if this has anything to do with NetherEX, which is also installed but was unmentioned by the log.
https://gist.github.com/NotAVerb/fd7b8440c1f4a6aaab1904d4f83c188b
Some sort of nullpointer exception.

Archiving, please see ticket 513 for resolution information once available.

another occurence of #513