ElasticSearch node stopping with no visible error

Hi All,

I have the following setup:

-2 nodes running a elastisearch cluster (Linux 6.5) with elastic version 5.5.1
-1 of these nodes also running logstash 5.5.1

-I have also installed metricbeats in around 50 servers.

My issue is that one the elasticsearch nodes are shutting down without further notice. No visible error and plenty space for the collectors. The only message on the log file is:
[2017-08-25T18:12:35,007][INFO ][o.e.n.Node ] [sgxxp0013cld] stopping ...
[2017-08-25T18:12:36,347][INFO ][o.e.n.Node ] [sgxxp0013cld] stopped
[2017-08-25T18:12:36,348][INFO ][o.e.n.Node ] [sgxxp0013cld] closing ...
[2017-08-25T18:12:36,369][INFO ][o.e.n.Node ] [sgxxp0013cld] closed

Any idea what to do i do now? Is it possible that the issue is related to only having 2 elastic nodes running?

Thanks,
Daniel

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