# Elastic Search Single Node Cluster not working **URL:** \ **Category:** Elasticsearch\ **Created:** [April 10, 2021, 7:37pm UTC](https://discuss.elastic.co/t/elastic-search-single-node-cluster-not-working/269785 "2021-04-10T19:37:25Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Selva\_kumar2](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/selva_kumar2/32/78663_2.png) [@Selva\_kumar2](https://discuss.elastic.co/u/Selva_kumar2)\ **Post date:** [April 10, 2021, 7:37pm UTC](https://discuss.elastic.co/t/elastic-search-single-node-cluster-not-working/269785/1 "2021-04-10T19:37:25Z")
I am trying to set up single node elastic search. But master node is not at all discovering. If I start with cluster.initial\_master\_nodes as one node. Master is elected but cluster formation is not happening and RemoteTransportException is occured. I tried too hard and multiple possibilites but no luck. Here is my configuration. I tried the same configuration with windows its working fine. But linux cent os I am facing the problem. Os Version: CentOS Linux release 7.9.2009 (Core) Elastic : 7.11.2 RPM Distribution Node1 cluster.name: escluster node.name: master-1 path.data: /var/lib/elasticsearch path.logs: /var/log/elasticsearch network.host: 0.0.0.0 http.port: 9200 discovery.seed\_hosts: ["127.0.0.1"] cluster.initial\_master\_nodes: ["master-1", "master-2","master-3"] node.max\_local\_storage\_nodes: 3 Node2 cluster.name: escluster node.name: master-2 path.data: /var/lib/elasticsearch path.logs: /var/log/elasticsearch network.host: 0.0.0.0 http.port: 9201 discovery.seed\_hosts: ["127.0.0.1"] cluster.initial\_master\_nodes: ["master-1", "master-2","master-3"] node.max\_local\_storage\_nodes: 3 Node3 cluster.name: escluster node.name: master-3 path.data: /var/lib/elasticsearch path.logs: /var/log/elasticsearch network.host: 0.0.0.0 http.port: 9202 discovery.seed\_hosts: ["127.0.0.1"] cluster.initial\_master\_nodes: ["master-1", "master-2","master-3"] node.max\_local\_storage\_nodes: 3 All the three nodes are starting successfully. But the cluster formation is not happening. [2021-04-10T15:04:22,868][INFO][o.e.t.TransportService] [master-1] publish\_address {x.x.x.x:9301}, bound\_addresses {[::]:9301} [2021-04-10T15:04:23,246][INFO][o.e.b.BootstrapChecks] [master-1] bound or publishing to a non-loopback address, enforcing bootstrap checks [2021-04-10T15:04:23,435][WARN][o.e.c.c.ClusterBootstrapService] [master-1] bootstrapping cancelled java.lang.IllegalStateException: requirement [master-1] matches multiple nodes: [{master-1}{yQiAG1tJS7uwgNiyJ3suWg}{k4haC3AdQXiSrceLevHHaA} {x.x.x.x}{x.x.x.x:9301}{cdhilmrstw}{ml.machine\_memory=8078663680, xpack.installed=true, transform.node=true, ml.max\_open\_jobs=20, ml.max\_jvm\_size=536870912}, {master-1}{H4T0B4AdTiWVYHW9Dzi0qw}{tQlVqLzYT3OJXtaug6K3cQ}{x.x.x.x}{x.x.x.x:9300}{cdhilmrstw}{ml.machine\_memory=8078663680, ml.max\_open\_jobs=20, xpack.installed=true, ml.max\_jvm\_size=536870912, transform.node=true}] curl -XGET [http://127.0.0.1:9200/\_cluster/health?pretty](http://127.0.0.1:9200/_cluster/health?pretty) { "error" : { "root\_cause" : [ { "type" : "master\_not\_discovered\_exception", "reason" : null } ], "type" : "master\_not\_discovered\_exception", "reason" : null }, "status" : 503 } [2021-04-10T15:24:20,990][WARN][o.e.c.c.ClusterFormationFailureHelper] [master-1] master not discovered yet, this node has not previously joined a bootstrapped (v7+) cluster, and this node must discover master-eligible nodes [master-1, master-2, master-3] to bootstrap a cluster: have discovered [{master-1}{RVGdv8o4R7mEZS8G3pF9IQ} {Ue\_VMHc\_RFqOjLeW9aJiUw}{x.x.x.x}{x.x.x.x:9302}{cdhilmrstw}{ml.machine\_memory=8078663680, xpack.installed=true, transform.node=true, ml.max\_open\_jobs=20, ml.max\_jvm\_size=536870912}, {master-1}{H4T0B4AdTiWVYHW9Dzi0qw}{tQlVqLzYT3OJXtaug6K3cQ}{x.x.x.x}{x.x.x.x:9300}{cdhilmrstw}{ml.machine\_memory=8078663680, ml.max\_open\_jobs=20, xpack.installed=true, ml.max\_jvm\_size=536870912, transform.node=true}, {master-1}{yQiAG1tJS7uwgNiyJ3suWg}{k4haC3AdQXiSrceLevHHaA}{x.x.x.x}{x.x.x.x:9301}{cdhilmrstw}{ml.machine\_memory=8078663680, ml.max\_open\_jobs=20, xpack.installed=true, ml.max\_jvm\_size=536870912, transform.node=true}]; discovery will continue using [127.0.0.1:9300] from hosts providers and [{master-1}{RVGdv8o4R7mEZS8G3pF9IQ}{Ue\_VMHc\_RFqOjLeW9aJiUw}{x.x.x.x}{x.x.x.x:9302}{cdhilmrstw}{ml.machine\_memory=8078663680, xpack.installed=true, transform.node=true, ml.max\_open\_jobs=20, ml.max\_jvm\_size=536870912}] from last-known cluster state; node term 0, last-accepted version 0 in term 0 Any help will be greatly appreciated!!! ---
**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\ **Post date:** [April 10, 2021, 7:44pm UTC](https://discuss.elastic.co/t/elastic-search-single-node-cluster-not-working/269785/2 "2021-04-10T19:44:06Z")
Your nodes are all called `master-1`. > [@Selva\_kumar2](#): > > ```auto > have discovered [ > {master-1}{RVGdv8o4R7mEZS8G3pF9IQ}{Ue_VMHc_RFqOjLeW9aJiUw}{x.x.x.x}{x.x.x.x:9302}{cdhilmrstw}{ml.machine_memory=8078663680, xpack.installed=true, transform.node=true, ml.max_open_jobs=20,ml.max_jvm_size=536870912}, > {master-1}{H4T0B4AdTiWVYHW9Dzi0qw}{tQlVqLzYT3OJXtaug6K3cQ}{x.x.x.x}{x.x.x.x:9300}{cdhilmrstw}{ml.machine_memory=8078663680,ml.max_open_jobs=20, xpack.installed=true, ml.max_jvm_size=536870912, transform.node=true}, > {master-1}{yQiAG1tJS7uwgNiyJ3suWg}{k4haC3AdQXiSrceLevHHaA}{x.x.x.x}{x.x.x.x:9301}{cdhilmrstw}{ml.machine_memory=8078663680, ml.max_open_jobs=20, xpack.installed=true, ml.max_jvm_size=536870912, transform.node=true}]... > > ``` Also this setting is deprecated as it's a little dangerous: > [@Selva\_kumar2](#): > > node.max\_local\_storage\_nodes: 3 ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 8, 2021, 7:44pm UTC](https://discuss.elastic.co/t/elastic-search-single-node-cluster-not-working/269785/3 "2021-05-08T19:44:24Z")
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