metricbeat collects data and sends data to logstash - elasticsearch. All of sudden there is no data in elasticsearch and don't see any errors or debug in elasticsearch and logstash logs. when I check the status of metricbeat in all servers its running and logs looks good. I restarted all metricbeat servers and can see the data in kibana, indices are created but after some time there is no data. Again I restarted then I see the data but later no data. its weird, unable to figure out why?