Elasticsearch throws 'not enough master nodes discovered during pinging' error

Elastic Stack Elasticsearch
1

Hi,

I am trying to setup Elasticsearch cluster(6.3.2) with 4 nodes(1 coordinating node and 3 Master Eligible and Data nodes). Elasticsearch is starting on all 4 nodes separately but it's not forming a cluster. Error I get is,

not enough master nodes discovered during pinging

Here are some setting in yml file,

node.master: true
node.data: true
bootstrap.memory_lock: true
network.host: 0.0.0.0
http.port: 9200
discovery.zen.ping.unicast.hosts: ["xxxxx", "xxxxx", "xxxxx"]
discovery.zen.minimum_master_nodes: 2

With exact same yml I've been running Production cluster(5.6.7) for long time
I tried changing network.host to the exact ip address of the machine with no luck.

Can someone please help me understand the issue?

2

Every time this happens to me it's because whatever I am putting in for "xxxxx" is either

  1. not matching up with the IP:port that other ES nodes are actually listening on (verify with netstat), or
  2. that IP:port is just not reachable (verify with curl)
3

Can you please explain how to check this?

I've tested it with curl http://xxxx:9200 and it gave me cluster information without any error (where xxxx is other machine's IP)

4

Hi,

Can someone please help me on this?

Thanks in advance