# Missing data in cluster

**URL:** <https://discuss.elastic.co/t/missing-data-in-cluster/199757>\
**Category:** Elasticsearch\
**Created:** [September 17, 2019, 5:32am UTC](https://discuss.elastic.co/t/missing-data-in-cluster/199757 "2019-09-17T05:32:52Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![theaxe](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/theaxe/32/53573_2.png) [@theaxe](https://discuss.elastic.co/u/theaxe)\
**Post date:** [September 17, 2019, 5:32am UTC](https://discuss.elastic.co/t/missing-data-in-cluster/199757/1 "2019-09-17T05:32:52Z")

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Hi everyone

In a cluster of 3 running es 2.4, from time to time randomly I have missing data, data appears at first, but then disappears.

Server load seems alright.

The environment is redis, mysql es and php

attached is servers load

 ![Capture](https://us1.discourse-cdn.com/elastic/original/3X/6/2/624264e04f8aa7b6ba1bba5d96ac1159ba45029d.jpeg)

Any advice or idea as to what could be the reason?

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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:** [September 17, 2019, 5:57am UTC](https://discuss.elastic.co/t/missing-data-in-cluster/199757/2 "2019-09-17T05:57:05Z")

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How are you identifying that data is missing? How are your nodes configured? Are all nodes master-eligible? If so, have you set `minimum_master_nodes` to `2` as described [here](https://www.elastic.co/guide/en/elasticsearch/reference/2.4/modules-node.html#split-brain)?

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**Author:** ![theaxe](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/theaxe/32/53573_2.png) [@theaxe](https://discuss.elastic.co/u/theaxe)\
**Post date:** [September 17, 2019, 6:22am UTC](https://discuss.elastic.co/t/missing-data-in-cluster/199757/3 "2019-09-17T06:22:23Z")

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I did not experience this issue until now, the system was running like a clock for the past 1 year, suddenly from 2 weeks ago we experience inconsistencies in the data.

I believe the cluster settings are correct

All nodes master eligible and minimum master is set to 2

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/5/9/590eabd687eb3b3061bf6814113da7957ea340e2.png)  
 ![image](https://us1.discourse-cdn.com/elastic/original/3X/a/c/ac2ad9f05b44395a43d9e9991fd410a9bcab5ab5.png)  
 ![image](https://us1.discourse-cdn.com/elastic/original/3X/c/a/ca94b398cb73d862db95605e32725343568fe897.png)

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<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:** [September 17, 2019, 7:07am UTC](https://discuss.elastic.co/t/missing-data-in-cluster/199757/4 "2019-09-17T07:07:18Z")

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How did you identify that data is missing?

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<div class="post-metadata">

**Author:** ![theaxe](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/theaxe/32/53573_2.png) [@theaxe](https://discuss.elastic.co/u/theaxe)\
**Post date:** [September 17, 2019, 7:17am UTC](https://discuss.elastic.co/t/missing-data-in-cluster/199757/5 "2019-09-17T07:17:37Z")

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despite http 200, sometimes the saved data does not exist when loading the updated page, and sometimes (almost always it exists) it does exist.

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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:** [October 15, 2019, 7:31am UTC](https://discuss.elastic.co/t/missing-data-in-cluster/199757/6 "2019-10-15T07:31:26Z")

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Closed on October 15, 2019, 7:31am UTC

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