i have a 2 node ES cluster with identical hosts.. the only difference is
that they are in different AZs in aws and one is using ebs instead of
ephemeral store. i have a replica setting of 1 (so 2 copies). the problem
im seeing is that the ebs based node is pegging the cpu.. there is nothing
else running on that host. bigdesk indicates that there are 137k file
descriptors on this one vs 3k on the ephemeral one. number of threads in
hot host is more than twice of the cold one. used heap is also higher in
hot host. they both are started with same max heap of 8gb.
any ideas on what could be going on?