Hello! We are migrating our pipeline from Flink 1.8 to 1.10 in Kubernetes. In the first try, we simply copied the old 'taskmanager.heap.size' over to 'taskmanager.memory.flink.size'. This caused the cluster to OOM. Eventually we had to allocate a small amount of memory to 'taskmanager.memory.task.off-heap.size' for it to stop failing. But we don't quite understand why this needs to be overriden.
I saw the default for 'taskmanager.memory.task.off-heap.size' is 0, does that mean in most cases task managers won't need off-heap memory? What are some examples that off-heap memory need to be non-zero? Thank you!
