# Orphan Data Node

**URL:** <https://discuss.elastic.co/t/orphan-data-node/197463>\
**Category:** Elasticsearch\
**Created:** [August 30, 2019, 7:53am UTC](https://discuss.elastic.co/t/orphan-data-node/197463 "2019-08-30T07:53:41Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Erik\_Jonsson\_Thoren](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/erik_jonsson_thoren/32/53348_2.png) [@Erik\_Jonsson\_Thoren](https://discuss.elastic.co/u/Erik_Jonsson_Thoren)\
**Post date:** [August 30, 2019, 7:53am UTC](https://discuss.elastic.co/t/orphan-data-node/197463/1 "2019-08-30T07:53:41Z")

</div>

Hi,

We lost our master-nodes in our cluster due to a faulty deployment process, and now our data-nodes cant join the new master nodes due to cluster id mismatch.

If we want no data-loss, what are our options?

---

<div class="post-metadata">

**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 30, 2019, 4:58pm UTC](https://discuss.elastic.co/t/orphan-data-node/197463/2 "2019-08-30T16:58:24Z")

</div>

Which version of Elasticsearch are you on?

---

<div class="post-metadata">

**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [August 31, 2019, 6:06am UTC](https://discuss.elastic.co/t/orphan-data-node/197463/3 "2019-08-31T06:06:10Z")

</div>

Unfortunately if you lost your master nodes then you have already lost data. The master nodes hold information that isn't held elsewhere. Your best bet is to restore from a snapshot.

(It'll be version 7.x, Christian, since earlier versions would erroneously ignore the lost data)

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 28, 2019, 6:06am UTC](https://discuss.elastic.co/t/orphan-data-node/197463/4 "2019-09-28T06:06:19Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.