Hi Lukas,
Below is from Kibana log.
{"type":"log","@timestamp":"2019-06-19T05:53:45Z","tags":["debug","server"],"pid":1844,"message":"starting server"}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","http","server"],"pid":1844,"message":"starting http server"}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","http","server"],"pid":1844,"message":"http server running at http://localhost:5601"}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","plugins-service"],"pid":1844,"message":"Starting plugins service"}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","config"],"pid":1844,"message":"Marking config path as handled: plugins"}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","plugins-discovery"],"pid":1844,"message":"Discovering plugins..."}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","plugins-discovery"],"pid":1844,"message":"Scanning "/src/plugins" for plugin sub-directories..."}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","plugins-discovery"],"pid":1844,"message":"Scanning "/plugins" for plugin sub-directories..."}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","plugins-discovery"],"pid":1844,"message":"Scanning "/kibana-extra" for plugin sub-directories..."}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","plugins-service"],"pid":1844,"message":"Discovered 0 plugins."}
{"type":"log","@timestamp":"2019-06-19T05:53:46Z","tags":["debug","legacy-service"],"pid":1844,"message":"starting legacy service"}
{"type":"log","@timestamp":"2019-06-19T05:53:47Z","tags":["debug","config"],"pid":1844,"message":"Marking config path as handled: server"}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["plugin","debug"],"pid":1844,"path":"/usr/share/kibana/node_modules/x-pack","message":"Found plugin at /usr/share/kibana/node_modules/x-pack"}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["debug","legacy-proxy"],"pid":1844,"message":""getConnections" has been called."}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["plugin","debug"],"pid":1844,"path":"/usr/share/kibana/src/legacy/core_plugins/apm_oss","message":"Found plugin at /usr/share/kibana/src/legacy/core_plugins/apm_oss"}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["plugin","debug"],"pid":1844,"path":"/usr/share/kibana/src/legacy/core_plugins/console","message":"Found plugin at /usr/share/kibana/src/legacy/core_plugins/console"}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["plugin","debug"],"pid":1844,"path":"/usr/share/kibana/src/legacy/core_plugins/elasticsearch","message":"Found plugin at /usr/share/kibana/src/legacy/core_plugins/elasticsearch"}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["plugin","debug"],"pid":1844,"path":"/usr/share/kibana/src/legacy/core_plugins/inspector_views","message":"Found plugin at /usr/share/kibana/src/legacy/core_plugins/inspector_views"}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["plugin","debug"],"pid":1844,"path":"/usr/share/kibana/src/legacy/core_plugins/interpreter","message":"Found plugin at /usr/share/kibana/src/legacy/core_plugins/interpreter"}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["plugin","debug"],"pid":1844,"path":"/usr/share/kibana/src/legacy/core_plugins/kbn_doc_views","message":"Found plugin at /usr/share/kibana/src/legacy/core_plugins/kbn_doc_views"}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["plugin","debug"],"pid":1844,"path":"/usr/share/kibana/src/legacy/core_plugins/input_control_vis","message":"Found plugin at /usr/share/kibana/src/legacy/core_plugins/input_control_vis"}
{"type":"log","@timestamp":"2019-06-19T05:54:04Z","tags":["plugin","debug"],"pid":1844,"path":"/usr/share/kibana/src/legacy/core_plugins/kbn_vislib_vis_types","message":"Found plugin at /usr/share/kibana/src/legacy/core_plugins/kbn_vislib_vis_types"}