# All nodes green, cluster yellow (or green?)

**URL:** <https://discuss.elastic.co/t/all-nodes-green-cluster-yellow-or-green/245485>\
**Category:** Elasticsearch\
**Created:** [August 18, 2020, 7:36pm UTC](https://discuss.elastic.co/t/all-nodes-green-cluster-yellow-or-green/245485 "2020-08-18T19:36:25Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![tarkhil](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tarkhil/32/74110_2.png) [@tarkhil](https://discuss.elastic.co/u/tarkhil)\
**Post date:** [August 18, 2020, 7:36pm UTC](https://discuss.elastic.co/t/all-nodes-green-cluster-yellow-or-green/245485/1 "2020-08-18T19:36:25Z")

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Hello

I'm running ElasticSearch 6.8.(mix of 8 and 10).

Kibana shows that all nodes are green, but cluster is yellow.

Graylog disagrees with Kibana - "Elasticsearch cluster is green".

What's happening, what should I fix and how do I prevent such a thing?

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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:** [August 18, 2020, 8:40pm UTC](https://discuss.elastic.co/t/all-nodes-green-cluster-yellow-or-green/245485/2 "2020-08-18T20:40:12Z")

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You should not run mixed version clusters as it can interfere with shard allocation. Upgrade all nodes to the same version.

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**Author:** ![tarkhil](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tarkhil/32/74110_2.png) [@tarkhil](https://discuss.elastic.co/u/tarkhil)\
**Post date:** [August 18, 2020, 8:51pm UTC](https://discuss.elastic.co/t/all-nodes-green-cluster-yellow-or-green/245485/3 "2020-08-18T20:51:30Z")

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Thank you. I thought about it, but was busy with lots of other tasks. Will try tomorrow, I was planning to upgrade anyway.

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**Author:** ![tarkhil](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tarkhil/32/74110_2.png) [@tarkhil](https://discuss.elastic.co/u/tarkhil)\
**Post date:** [August 19, 2020, 8:06am UTC](https://discuss.elastic.co/t/all-nodes-green-cluster-yellow-or-green/245485/4 "2020-08-19T08:06:47Z")

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Right after I've upgraded a master node to 6.8.11, cluster became Green. As far as I understand the result, master should not have older version than other nodes. Others can have different patchlevel.

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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:** [August 19, 2020, 8:09am UTC](https://discuss.elastic.co/t/all-nodes-green-cluster-yellow-or-green/245485/5 "2020-08-19T08:09:02Z")

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All data nodes need to have exactly the same version. It is therefore recommended to have ALL nodes on exactly the same version.

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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:** [September 16, 2020, 8:09am UTC](https://discuss.elastic.co/t/all-nodes-green-cluster-yellow-or-green/245485/6 "2020-09-16T08:09:13Z")

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