# Elasticsearch cluster issue **URL:** \ **Category:** Elasticsearch\ **Created:** [March 5, 2022, 1:08am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882 "2022-03-05T01:08:17Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![RAM\_NATHAN](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ram_nathan/32/50393_2.png) [@RAM\_NATHAN](https://discuss.elastic.co/u/RAM_NATHAN)\ **Post date:** [March 5, 2022, 1:08am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/1 "2022-03-05T01:08:17Z")
I had one node. I didnt delete data in first node. Then I deleted data from second and third nodes, try to add to first node cluster. But it created two clusters. One with first node alone Another with second and third node Then again I deleted data folder from second node and restarted, it joined first node I tried to do same for third node, so that it will join first-second node cluster. But it failed with below [2022-03-05T06:31:15,463][WARN][o.e.c.c.ClusterFormationFailureHelper] [node-1] master not discovered or elected yet, an election requires 2 nodes with ids [P8UZyNN6QemAZx30yItePw, n33C65BCT8GZOftT3NJbPw], have discovered [{node-1}{n33C65BCT8GZOftT3NJbPw}{-IMxzqJjS5eob0cQ8TSwFQ}{ **.**. **.** }{ **.**. **.** :9300}{cdhilmrstw}{ml.machine\_memory=3973865472, xpack.installed=true, transform.node=true, ml.max\_open\_jobs=20}, {node-3}{P8UZyNN6QemAZx30yItePw}{hry-dnyWTwWd2pmstfPl-Q}{ **.**. **.** }{ **.**. **.** :9300}{cdhilmrstw}{ml.machine\_memory=3878227968, ml.max\_open\_jobs=20, xpack.installed=true, transform.node=true}] which is a quorum; discovery will continue using [**.**. **.** :9300, **.**. **.** :9300] from hosts providers and [{node-1}{n33C65BCT8GZOftT3NJbPw}{-IMxzqJjS5eob0cQ8TSwFQ}{ **.**. **.** }{ **.**. **.** :9300}{cdhilmrstw}{ml.machine\_memory=3973865472, xpack.installed=true, transform.node=true, ml.max\_open\_jobs=20}] from last-known cluster state; node term 0, last-accepted version 0 in term 0 I deleted data folder for third node, but its not coming up. Can someone please advice? Im on ELK 7.10.2 ---
**Author:** ![RAM\_NATHAN](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ram_nathan/32/50393_2.png) [@RAM\_NATHAN](https://discuss.elastic.co/u/RAM_NATHAN)\ **Post date:** [March 10, 2022, 8:36am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/2 "2022-03-10T08:36:25Z")
Can someone please reply? ---
**Author:** ![casterQ](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/casterq/32/93257_2.png) [@casterQ](https://discuss.elastic.co/u/casterQ)\ **Post date:** [March 10, 2022, 8:50am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/3 "2022-03-10T08:50:33Z")
Configure these two parameters `discovery.seed_hosts` and `cluster.initial_master_nodes` both contain your three node，delete your data path , then start one by one here is the doc： > **[Discovery and cluster formation settings | Elasticsearch Guide \[7.10\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/7.10/modules-discovery-settings.html)** ---
**Author:** ![RAM\_NATHAN](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ram_nathan/32/50393_2.png) [@RAM\_NATHAN](https://discuss.elastic.co/u/RAM_NATHAN)\ **Post date:** [March 10, 2022, 8:55am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/4 "2022-03-10T08:55:20Z")
I have these entries added already. Im trying to add a new node to existing cluster. Is that supported? Will that work? ---
**Author:** ![casterQ](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/casterq/32/93257_2.png) [@casterQ](https://discuss.elastic.co/u/casterQ)\ **Post date:** [March 10, 2022, 8:57am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/5 "2022-03-10T08:57:18Z")
a new node，you can set `cluster.initial_master_nodes` null ---
**Author:** ![RAM\_NATHAN](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ram_nathan/32/50393_2.png) [@RAM\_NATHAN](https://discuss.elastic.co/u/RAM_NATHAN)\ **Post date:** [March 10, 2022, 9:04am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/6 "2022-03-10T09:04:37Z")
Thank you. But that scenario is supported in 7.10 correct? Adding a new node to existing cluster ---
**Author:** ![casterQ](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/casterq/32/93257_2.png) [@casterQ](https://discuss.elastic.co/u/casterQ)\ **Post date:** [March 10, 2022, 9:08am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/7 "2022-03-10T09:08:05Z")
Any version supports adding new nodes ---
**Author:** ![RAM\_NATHAN](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ram_nathan/32/50393_2.png) [@RAM\_NATHAN](https://discuss.elastic.co/u/RAM_NATHAN)\ **Post date:** [March 10, 2022, 9:11am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/9 "2022-03-10T09:11:04Z")
> [@casterQ](#): > > `cluster.initial_master_nodes` So when ever adding new node, I should as `cluster.initial_master_nodes` set to null in all the new nodes. Then it will get added. Am I correct? ---
**Author:** ![casterQ](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/casterq/32/93257_2.png) [@casterQ](https://discuss.elastic.co/u/casterQ)\ **Post date:** [March 10, 2022, 9:20am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/10 "2022-03-10T09:20:31Z")
yes, and: - set `discovery.seed_hosts` to master-eligible nodes - `cluster.name` must be consistent - `node.name` must be different ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 7, 2022, 9:21am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-issue/298882/11 "2022-04-07T09:21:21Z")
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