# Upgrading of Elasticsearch 1.7.3 to 2.3.5

**URL:** <https://discuss.elastic.co/t/upgrading-of-elasticsearch-1-7-3-to-2-3-5/57442>\
**Category:** Elasticsearch\
**Created:** [August 8, 2016, 5:17am UTC](https://discuss.elastic.co/t/upgrading-of-elasticsearch-1-7-3-to-2-3-5/57442 "2016-08-08T05:17:50Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![gringo](https://avatars.discourse-cdn.com/v4/letter/g/f19dbf/32.png) [@gringo](https://discuss.elastic.co/u/gringo)\
**Post date:** [August 8, 2016, 5:17am UTC](https://discuss.elastic.co/t/upgrading-of-elasticsearch-1-7-3-to-2-3-5/57442/1 "2016-08-08T05:17:50Z")

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Anyone knows the steps to upgrade elasticsearch from 1.7.3 to 2.5.3?

The link below is useless. They either lead to long list of exceptions or the indices will be not appear anymore.

[https://www.elastic.co/guide/en/elasticsearch/reference/current/rolling-upgrades.html#upgrade-node](https://www.elastic.co/guide/en/elasticsearch/reference/current/rolling-upgrades.html#upgrade-node)

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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 8, 2016, 5:21am UTC](https://discuss.elastic.co/t/upgrading-of-elasticsearch-1-7-3-to-2-3-5/57442/2 "2016-08-08T05:21:42Z")

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Have you read [this blog post](https://www.elastic.co/blog/key-point-to-be-aware-of-when-upgrading-from-elasticsearch-1-to-2) and run the migration plugin described therein to identify any potential issues that would cause problems in an upgrade?

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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:** [August 8, 2016, 7:53am UTC](https://discuss.elastic.co/t/upgrading-of-elasticsearch-1-7-3-to-2-3-5/57442/3 "2016-08-08T07:53:30Z")

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2.5.3 doesn't exist, maybe you mean 2.3.5?

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**Author:** ![gringo](https://avatars.discourse-cdn.com/v4/letter/g/f19dbf/32.png) [@gringo](https://discuss.elastic.co/u/gringo)\
**Post date:** [August 11, 2016, 7:58am UTC](https://discuss.elastic.co/t/upgrading-of-elasticsearch-1-7-3-to-2-3-5/57442/4 "2016-08-11T07:58:16Z")

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Sorry. Wrote the wrong version number. The correct version should be 2.3.5

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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:** [July 5, 2017, 10:28pm UTC](https://discuss.elastic.co/t/upgrading-of-elasticsearch-1-7-3-to-2-3-5/57442/5 "2017-07-05T22:28:35Z")

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