Not able join two nodes elastic search clustering

Elastic Stack Elasticsearch
1

I am not able to join two nodes while configuring cluster setup for elasticsearch 7.4.2 version.
I am getting below error

org.elasticsearch.transport.RemoteTransportException: [node-1][10.112.2.93:9300][internal:cluster/coordination/join]
Caused by: java.lang.IllegalStateException: failure when sending a validation request to node
	at org.elasticsearch.cluster.coordination.Coordinator$2.onFailure(Coordinator.java:513) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.action.ActionListenerResponseHandler.handleException(ActionListenerResponseHandler.java:59) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.transport.TransportService$ContextRestoreResponseHandler.handleException(TransportService.java:1120) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.transport.TransportService$ContextRestoreResponseHandler.handleException(TransportService.java:1120) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.transport.InboundHandler.lambda$handleException$2(InboundHandler.java:243) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:703) ~[elasticsearch-7.4.2.jar:7.4.2]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]
	at java.lang.Thread.run(Thread.java:830) [?:?]
Caused by: org.elasticsearch.transport.RemoteTransportException: [node-2][10.112.2.129:9300][internal:cluster/coordination/join/validate]
Caused by: org.elasticsearch.cluster.coordination.CoordinationStateRejectedException: join validation on cluster state with a different cluster uuid eLciY_QHRjOBkWo6Y94taw than local cluster uuid UCZP2y6pSpmp0jp7tZj-WA, rejecting
	at org.elasticsearch.cluster.coordination.JoinHelper.lambda$new$4(JoinHelper.java:148) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor$ProfileSecuredRequestHandler$1.doRun(SecurityServerTransportInterceptor.java:257) ~[?:?]
	at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor$ProfileSecuredRequestHandler.messageReceived(SecurityServerTransportInterceptor.java:315) ~[?:?]
	at org.elasticsearch.transport.RequestHandlerRegistry.processMessageReceived(RequestHandlerRegistry.java:63) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.transport.InboundHandler$RequestHandler.doRun(InboundHandler.java:264) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:773) ~[elasticsearch-7.4.2.jar:7.4.2]
	at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-7.4.2.jar:7.4.2]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]
	at java.lang.Thread.run(Thread.java:830) ~[?:?]

Could you please help me out

2

YML configured as below

cluster.name: TEST

node.name: node-1
node.master: true 
node.data: false

path.data: /var/lib/elasticsearch

path.logs: /var/log/elasticsearch

network.host: server1

discovery.seed_hosts: ["server1", "server2"]

xpack.ml.enabled: false
xpack.security.enabled: false
3

These nodes used to belong to different clusters so you cannot join them together.

Likely you need to read this note in the manual.

4

Hi,
Thanks for reply ..
But i have given same cluster name in both yml file .. is there anything need to change in yml.
In yml file i have given same cluster name for node1 and node 2

5 
I didnt mention cluster.initial_master_nodes in my yml file .
I have one master and one data node so in that case how can i configure cluster.initial_master_nodes.

For node1 i can give cluster.initial_master_nodes: node 1 then what about node2 .

Could you please clarify if i did some mistake in yml configuration.

6

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