I am trying to set up Elastic Search cluster with two nodes but I keep getting this error.
[o.e.d.z.ZenDiscovery ] [master-node] not enough master nodes discovered ?during pinging (found [[Candidate{node={master-node}{EzeNCWZBR0aAKUP6Va9ZwA}{ZFq4O019Q2WVEWiISBQi2g}{ip-172-31-6-165}{172.31.6.165:9300}{ml.machine_memory=8369979392, xpack.installed=true, ml.max_open_jobs=20,
ml.enabled=true}, clusterStateVersion=-1}]], but needed [2]), pinging again
Here are my node configuration
1. Master Node
cluster.name: prod-analytic-stats
node.name: master-node
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.host: ip-172-31-6-165
discovery.zen.ping.unicast.hosts: ["ip-172-31-21-37", "ip-172-31-6-165"]
discovery.zen.minimum_master_nodes: 2
2. data node
cluster.name: prod-analytic-stats
node.name: replica-node
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.host: ip-172-31-21-37
discovery.zen.ping.unicast.hosts: ["ip-172-31-21-37", "ip-172-31-6-165"]
discovery.zen.minimum_master_nodes: 1
However I am able to ping data node from master node
root@ip-172-31-6-165:/etc/elasticsearch# ping 172.31.21.37
PING 172.31.21.37 (172.31.21.37) 56(84) bytes of data.
64 bytes from 172.31.21.37: icmp_seq=1 ttl=255 time=1.18 ms
64 bytes from 172.31.21.37: icmp_seq=2 ttl=255 time=1.07 ms
64 bytes from 172.31.21.37: icmp_seq=3 ttl=255 time=1.14 ms
64 bytes from 172.31.21.37: icmp_seq=4 ttl=255 time=1.08 ms
64 bytes from 172.31.21.37: icmp_seq=5 ttl=255 time=1.16 ms
64 bytes from 172.31.21.37: icmp_seq=6 ttl=255 time=1.12 ms
64 bytes from 172.31.21.37: icmp_seq=7 ttl=255 time=1.21 ms
64 bytes from 172.31.21.37: icmp_seq=8 ttl=255 time=1.05 ms
--- 172.31.21.37 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7008ms
rtt min/avg/max/mdev = 1.051/1.131/1.219/0.068 ms
I am using Elastic Search 6.3.1 for both the nodes