I've a ES cluster 6.6.2 composed of 3 master, 4 datanodes, 2 coordinating nodes.
2 kibana instances connecting to 2 coordinating nodes.
2 coordinating nodes are 16GB of RAM, and 7GB of Heap (min=max heap).
On coordinating nodes only I face "out of memory exception" and O.S kill jvm process for elastichsearch.
I've enabled the bootstrap memory lock, and followed documentations.
Any idea what to do to prevent out-of-memory and keep service is up?