# Nodes not joing cluster **URL:** \ **Category:** Elasticsearch\ **Created:** [March 17, 2018, 2:13pm UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403 "2018-03-17T14:13:28Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![igormages](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igormages/32/28897_2.png) [@igormages](https://discuss.elastic.co/u/igormages)\ **Post date:** [March 17, 2018, 2:13pm UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/1 "2018-03-17T14:13:28Z")
Hello ! I can't make my nodes join the cluster. I get an cluster uuid like _na_... I don't know if this is because i upgraded to 6.2.2 from 5.X (5.3 or 5.6 i don't remember) ``` { "name" : "md2es", "cluster_name" : "md2es", "cluster_uuid" : "FMIiKfV1RoGhkd-jBiAe4g", "version" : { "number" : "6.2.2", "build_hash" : "10b1edd", "build_date" : "2018-02-16T19:01:30.685723Z", "build_snapshot" : false, "lucene_version" : "7.2.1", "minimum_wire_compatibility_version" : "5.6.0", "minimum_index_compatibility_version" : "5.0.0" }, "tagline" : "You Know, for Search" } ``` And in the other node i got that ``` { "name" : "md2puteaux", "cluster_name" : "md2es", "cluster_uuid" : "_na_", "version" : { "number" : "6.2.2", "build_hash" : "10b1edd", "build_date" : "2018-02-16T19:01:30.685723Z", "build_snapshot" : false, "lucene_version" : "7.2.1", "minimum_wire_compatibility_version" : "5.6.0", "minimum_index_compatibility_version" : "5.0.0" }, "tagline" : "You Know, for Search" } ``` Here is my yml : cluster.name: "md2es" node.name: "md2puteaux" path.data: /var/lib/elasticsearch path.logs: /var/log/elasticsearch #network.bind\_host: 0 network.host: 0.0.0.0 discovery.zen.ping.unicast.hosts: ["ip:9300"] bootstrap.memory\_lock: true Thanks for help ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [March 17, 2018, 3:30pm UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/2 "2018-03-17T15:30:57Z")
> [@igormages](#): > > discovery.zen.ping.unicast.hosts: ["ip:9300"] This need to contain the IP of the other node? Is that what you have in your config? If you have 2 master eligible nodes you should also set `minimum_master_nodes` to 2. ---
**Author:** ![igormages](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igormages/32/28897_2.png) [@igormages](https://discuss.elastic.co/u/igormages)\ **Post date:** [March 18, 2018, 11:24pm UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/3 "2018-03-18T23:24:02Z")
I just masked my ip for confidentiality... ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [March 19, 2018, 6:58am UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/4 "2018-03-19T06:58:24Z")
Yes, but which IP is that? ---
**Author:** ![igormages](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igormages/32/28897_2.png) [@igormages](https://discuss.elastic.co/u/igormages)\ **Post date:** [March 19, 2018, 8:18am UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/5 "2018-03-19T08:18:03Z")
It's the ip of my other server. And in my other server I put the ip of the first server. ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [March 19, 2018, 9:04am UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/6 "2018-03-19T09:04:56Z")
Any firewall blocking access to port 9300? Are you able to telnet from one host to port 9300 on the other? ---
**Author:** ![igormages](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igormages/32/28897_2.png) [@igormages](https://discuss.elastic.co/u/igormages)\ **Post date:** [March 19, 2018, 10:54am UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/7 "2018-03-19T10:54:09Z")
Yeah, all ports are open. Everything is fine. I have 2 elastics servers, they work fine in the cluster. I need to disable one and put a new one. But the new server (same config) don't join the cluster... ---
**Author:** ![igormages](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igormages/32/28897_2.png) [@igormages](https://discuss.elastic.co/u/igormages)\ **Post date:** [March 21, 2018, 11:17am UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/9 "2018-03-21T11:17:38Z")
Up ? I'm still trying everything and I don't found a solution... Now sometimes I get the same cluster uuid instead of _na_..... but shards are not joining... I don't have logs for that. I tried to increase the number of replicas... ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [March 21, 2018, 11:21am UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/10 "2018-03-21T11:21:56Z")
Can you telnet to from one node to the other on port 9300? Is there anything in the Elasticsearch logs? Can you add both IP addresses to `discovery.zen.ping.unicast.hosts` just to make sure it is symmetrical? Do you have any other non-default configuration settings? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 18, 2018, 11:22am UTC](https://discuss.elastic.co/t/nodes-not-joing-cluster/124403/11 "2018-04-18T11:22:03Z")
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