# Cannot join nodes to master 2

**URL:** <https://discuss.elastic.co/t/cannot-join-nodes-to-master-2/221793>\
**Category:** Elasticsearch\
**Created:** [March 3, 2020, 1:12am UTC](https://discuss.elastic.co/t/cannot-join-nodes-to-master-2/221793 "2020-03-03T01:12:15Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Julio\_Edel\_Salas\_Dia](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/julio_edel_salas_dia/32/60836_2.png) [@Julio\_Edel\_Salas\_Dia](https://discuss.elastic.co/u/Julio_Edel_Salas_Dia)\
**Post date:** [March 3, 2020, 1:12am UTC](https://discuss.elastic.co/t/cannot-join-nodes-to-master-2/221793/1 "2020-03-03T01:12:15Z")

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Hi, it is normal this error for to comunicate 2 nodes in an elasticsearch cluster?  
This is network traffic between two master nodes, to join each other.

> 10.28.11.7.9300 \> 10.28.11.8.48610: Flags [.], cksum 0xa1d5 (correct), ack 744, win 501, options [nop,nop,TS val 2850708992 ecr 727518300], length 0  
> 10.28.11.8.48608 \> 10.28.11.7.9300: Flags [P.], cksum 0x2be9 (incorrect -\> 0x766a), seq 622632872:622633240, ack 1689967306, win 502, options [nop,nop,TS val 727518614 ecr 2850655996,nop,nop,sack 1 {1449:1709}], length 368

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**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 3, 2020, 6:14am UTC](https://discuss.elastic.co/t/cannot-join-nodes-to-master-2/221793/2 "2020-03-03T06:14:25Z")

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Which version are you using? What is the configuration of the nodes?

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<div class="post-metadata">

**Author:** ![Julio\_Edel\_Salas\_Dia](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/julio_edel_salas_dia/32/60836_2.png) [@Julio\_Edel\_Salas\_Dia](https://discuss.elastic.co/u/Julio_Edel_Salas_Dia)\
**Post date:** [March 3, 2020, 1:46pm UTC](https://discuss.elastic.co/t/cannot-join-nodes-to-master-2/221793/3 "2020-03-03T13:46:26Z")

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I am using elasticsearch 7.6 and master node configuration is:

> ```
> cluster.name: emc-cluster-01
> node.name: emc-master-01
> node.master: true
> node.data: false
> node.ingest: false
> cluster.remote.connect: false
> path.data: /var/lib/elasticsearch
> path.logs: /var/log/elasticsearch
> network.host: 0.0.0.0
> discovery.seed_hosts: ["10.28.11.6", "10.28.11.7", "10.28.11.8"]
> cluster.initial_master_nodes: ["emc-master-01", "emc-master-02", "emc-master-03"]
> 
> ```

I can to say nodes are in two physical servers. If they are to gether, it work

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 31, 2020, 1:46pm UTC](https://discuss.elastic.co/t/cannot-join-nodes-to-master-2/221793/4 "2020-03-31T13:46:27Z")

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