Openhab crashes: sometimes multiple times a day, sometimes once a week

Looks correct. My Java on RPi2:

$ java -version
java version "1.8.0"
Java(TM) SE Runtime Environment (build 1.8.0-b132)
Java HotSpot(TM) Client VM (build 25.0-b70, mixed mode)

Odd things can happen if you’re not at the standard clock settings. Possibly other causes for crashing, too. FTR, I never see JVM crashes on my RPi2 setups with openHAB.