on elk 7.5

Hi All,
My first post to ELK!

I am trying 7.5 with following config:
Host| Purpose | Status
elk01| elasticsearch | running with with default
kibana01 | kibana | running but complains...

log [19:26:10.867] [error][data][elasticsearch] Request error, retrying
GET http://elk01:9200/_xpack => connect ECONNREFUSED
log [19:26:11.010] [warning][legacy-plugins] Skipping non-plugin directory at /home/dpatel/kibana-7.5.1-linux-x86_64/src/legacy/core_plugins/visualizations
log [19:26:11.385] [warning][data][elasticsearch] Unable to revive connection: http://elk01:9200/
log [19:26:11.385] [warning][data][elasticsearch] No living connections
log [19:26:11.386] [warning][licensing][plugins] License information could not be obtained from Elasticsearch for the [data] cluster. Error: No Living connections
log [19:26:11.479] [info][plugins-system] Starting [8] plugins: [security,licensing,code,timelion,features,spaces,translations,data]
log [19:26:11.484] [error][admin][elasticsearch] Request error, retrying
GET http://elk01:9200/.kibana => connect ECONNREFUSED
log [19:26:11.486] [error][admin][elasticsearch] Request error, retrying
GET http://elk01:9200/.kibana_task_manager => connect ECONNREFUSED
log [19:26:11.487] [warning][admin][elasticsearch] Unable to revive connection: http://elk01:9200/
log [19:26:11.487] [warning][admin][elasticsearch] No living connections

Is it because it needs some kind of license?
How do I really setup multi node experimental ELK cluster without any license?



What are elasticsearch logs?

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Thanks for advise. I will keep in mind from now on-wards.


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