Holy sh*t, you must start java with Xmx option.

swap 102396k(3032k free) that means your raspi was swapping 100MB on its sdcard, that will not work and your sdcard will die very fast.

Use:
java -Xmx150m -jar start.jar

And tell me how it goes. This way it will never oom on any raspi version.

Greets,
eb