# Node unable to join elasticsearch cluster

**URL:** <https://discuss.elastic.co/t/node-unable-to-join-elasticsearch-cluster/134157>\
**Category:** Elasticsearch\
**Created:** [June 1, 2018, 7:24am UTC](https://discuss.elastic.co/t/node-unable-to-join-elasticsearch-cluster/134157 "2018-06-01T07:24:08Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Bleyc](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bleyc/32/31831_2.png) [@Bleyc](https://discuss.elastic.co/u/Bleyc)\
**Post date:** [June 1, 2018, 7:24am UTC](https://discuss.elastic.co/t/node-unable-to-join-elasticsearch-cluster/134157/1 "2018-06-01T07:24:08Z")

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Hello Folks!  
am kinda new to elastic to forgive me if i have asked something that is obvious,  
i am trying to set up a cluster on windows, i tried with two nodes of elastic version elasticsearch-6.2.3, all was well and it worked.  
then i removed one node from the cluster and added another node running elasticsearch 5.4.0 (which i configured as the master) and it just does not work.  
my question is, is it possible to set up a cluster with two different version of elasticsearch?

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [June 1, 2018, 7:25am UTC](https://discuss.elastic.co/t/node-unable-to-join-elasticsearch-cluster/134157/2 "2018-06-01T07:25:15Z")

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You cannot mix versions like that sorry to say.

What are you trying to do?

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<div class="post-metadata">

**Author:** ![Bleyc](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bleyc/32/31831_2.png) [@Bleyc](https://discuss.elastic.co/u/Bleyc)\
**Post date:** [June 1, 2018, 7:27am UTC](https://discuss.elastic.co/t/node-unable-to-join-elasticsearch-cluster/134157/3 "2018-06-01T07:27:16Z")

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the reason is that we have an older elastic 5.4.0 in production, but we want to add another node, prefferably the latest release. hence mixed the versions.

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [June 1, 2018, 7:28am UTC](https://discuss.elastic.co/t/node-unable-to-join-elasticsearch-cluster/134157/4 "2018-06-01T07:28:33Z")

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You can mix 5.6.X and 6.X, but the expectation there is that you are doing this to upgrade to 6.X and not run a mixed version cluster.

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<div class="post-metadata">

**Author:** ![Bleyc](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bleyc/32/31831_2.png) [@Bleyc](https://discuss.elastic.co/u/Bleyc)\
**Post date:** [June 1, 2018, 7:30am UTC](https://discuss.elastic.co/t/node-unable-to-join-elasticsearch-cluster/134157/5 "2018-06-01T07:30:39Z")

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oh okay alright warkolm. i am enlightened, will do that then.  
thanks for the speedy assistance!

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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:** [June 29, 2018, 7:30am UTC](https://discuss.elastic.co/t/node-unable-to-join-elasticsearch-cluster/134157/6 "2018-06-29T07:30:42Z")

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