I have installed X-Pack to Kibana, LogStash and Elasticsearch and generally it working fine (all version 6.0). However, i do have some issues in elasticseach.
When looking in the logs i get a lot of these errors:
[2017-11-22T09:59:49,403][ERROR][o.e.x.m.c.i.IndexStatsCollector] [COOPMSV2001] collector [index-stats] timed out when collecting data [2017-11-22T09:59:59,418][ERROR][o.e.x.m.c.n.NodeStatsCollector] [COOPMSV2001] collector [node_stats] timed out when collecting data [2017-11-22T10:00:09,434][ERROR][o.e.x.m.c.c.ClusterStatsCollector] [COOPMSV2001] collector [cluster_stats] timed out when collecting data
Also, when looking at CPU utilization, elasticsearch has a contant high CPU load of 25-50%. This occurs with LogStash and Kibana stopped and no other activity on the server; basically idling.
I have a single node running both elasticsearch and logstash and another node running kibana.