[Troubleshooting] Elasticsearch - Client did not trust this server’s certificate, closing connection Netty4TcpChannel
Situation:
While adding nodes to an existing elasticsearch cluster, new nodes can’t be discovered and the master node log shows Elasticsearch — Client did not trust this server’s certificate, closing connection Netty4TcpChannel
Possible Reasons:
- elastic-certificate.p12 is different on elasticsearch hosts.
- Master nodes not started
- Connections between nodes are blocked behind a firewall
Reference: