FTR, there were regular reports of JVM crashes, similar to what is described here, see e.g. this report.
Wrt performance on ARM CPUs, see here.
And the performance issues on ARM are very real (afaik, this is mainly due to a missing JIT compiler) - see e.g. this report, where the startup of openHAB takes 20 minutes (and I have seen a similar behavior on a RPi2).
The good news is that Azul System now provides optimized OpenJDK builds for ARM that include JIT and seem to work as well as the Oracle JVM. For ARM computers, this is now definitely our recommendation.