You're probably just running out of memory, though if you examine the stacktrace it may tell you if you're running out of heap or off-heap memory. If there's a call to Unsafe.something() in there, it's probably off-heap. Otherwise it's probably on-heap.
You do seem to be configuring only a 3 GB heap, and 16 GB off off-heap, so you're likely not utilizing all the available memory. I believe you have to explicitly enable off-heap metrics collection, which is probably why it's reporting zero usage. You can do that through code, config, or JMX. See https://apacheignite.readme.io/docs/memory-metrics. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
