# Nodes discovery after upgrading from 1.7.1 to 2.2.0

**URL:** <https://discuss.elastic.co/t/nodes-discovery-after-upgrading-from-1-7-1-to-2-2-0/42061>\
**Category:** Elasticsearch\
**Created:** [February 17, 2016, 6:23pm UTC](https://discuss.elastic.co/t/nodes-discovery-after-upgrading-from-1-7-1-to-2-2-0/42061 "2016-02-17T18:23:40Z")\
**Posts on this page:** 1\
**Showing post:** 7

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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:** [February 17, 2016, 9:23pm UTC](https://discuss.elastic.co/t/nodes-discovery-after-upgrading-from-1-7-1-to-2-2-0/42061/7 "2016-02-17T21:23:01Z")

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This issue is why there is a stickied thread at the top 😉

> [@Connectivity issues with a new/upgraded 2.X cluster? Read here first slight\_smile](https://discuss.elastic.co/t/connectivity-issues-with-a-new-upgraded-2-x-cluster-read-here-first/35699/7):
>
> Well it's connecting to a valid interface. I'd suggest you create a separate thread and ask, I don't think this is a settings issue related to the original post.

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