Master not discovered exception

Elastic Stack Elasticsearch
1

Hi there,

We had 4 nodes and added fifth one yesterday. We were expecting to find master automatically but got master_not_discovered_exception. Furthermore other 4 nodes act like there is no fifth node. All of nodes have same configuration.

     discovery: {
    zen: {
    ping: {
    unicast: {
    hosts: [
    "x.x.x.1",
    "x.x.x.2",
    "x.x.x.3",
    "x.x.x.4",
    "x.x.x.5"
    ]
    }
    }
    }
    },
    client: {
    type: "node"
    },
    http: {
    type: {
    default: "netty4"
    },
    port: "9200"
    },
    transport: {
    type: {
    default: "netty4"
    }
    }
2

What's the error?
What version?

3

Version 5.2.2
telnet to master ok. ping ok. But got the error below when i try to search on index

And when i check for the node information on master here i got

By the way all 4 nodes have this configuration

4

Please don't post pictures of text, they are difficult to read and some people may not be even able to see them.

5

Ok. Sorry about that Mark, Here is the answer without pictures.
Version 5.2.2
telnet to master ok. ping ok. But got the error below when i try to search on index

{
  error: {
    root_cause: [
      {
        type: "master_not_discovered_exception",
        reason: null
      }
    ],
    type: "master_not_discovered_exception",
    reason: null
  },
  status: 503
}

And when i check for the node information on master here i got

  {
    _nodes: {
      total: 4,
      successful: 4,
      failed: 0
    }
  }

By the way all 4 nodes have this configuration

 roles: [
    "master",
    "data",
   "ingest"
 ],

And the exception in the log

[2017-04-12T12:05:14,155][INFO][o.e.d.z.ZenDiscovery] [node-5] failed to send join request to master [{node-1}{rzzzzzzzzzzzzzzzzzzzzzzzzzz}{3aaaaaaaaaaaaaaaaaaaaa}{y.y.y.y}{y.y.y.y:9300}], reason [RemoteTransportException[[node-1][y.y.y.y:9300][internal:discovery/zen/join]]; nested: ConnectTransportException[[node-5][x.x.x.x:9300] connect_timeout[30s]]; nested: IOException[Connectiontimed out: no further information: x.x.x.x/x.x.x.x:9300];]

7

Hi if you found an answer I will be happy to hear :slight_smile:

8

Hey Tomer,

It was because of Windows firewall. I added 9300 port to firewall on fifth node and its gone live.

9

Hi

My case is similar but no issues with firewall. Here are details...

-Regards, dp