# Data inconsistency - document exists / doesn't exist on every second request

**URL:** <https://discuss.elastic.co/t/data-inconsistency-document-exists-doesnt-exist-on-every-second-request/1972>\
**Category:** Elasticsearch\
**Created:** [June 4, 2015, 11:10pm UTC](https://discuss.elastic.co/t/data-inconsistency-document-exists-doesnt-exist-on-every-second-request/1972 "2015-06-04T23:10:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![virtuman](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/virtuman/32/49955_2.png) [@virtuman](https://discuss.elastic.co/u/virtuman)\
**Post date:** [June 4, 2015, 11:10pm UTC](https://discuss.elastic.co/t/data-inconsistency-document-exists-doesnt-exist-on-every-second-request/1972/1 "2015-06-04T23:10:21Z")

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Trying to figure this out for a few hours and can't wrap my head around this.  
I have an index with type products where ID is pre-assigned for each document upon product getting added to the index.

I have a separate process that runs every minute and monitors whether there're still some products in the index that don't have sufficient data elements and does appropriate actions based on product status. I recently began to notice that this process fails every once in a while and i was finally able to pinpoint how to reproduce an issue:

We have 4 elastic nodes with 1 index, 5 shards and each shard has 1 replica.  
when i try to request product - every second time it will result found: true // found: false

ie:  
**GET my\_index/products/123456**  
**_found:true_** and return product data

running exact same request, through the same node will render result not found:  
**GET my\_index/products/123456**  
**_found: false_**

it doesn't matter which one of the servers I try to access this doc through, every node will result in exact same behavior, where 1 time it will find the doc and every 2nd time it will not find this doc.

I'm getting exact same results when I try to use search for same document /\_search?q=id:123456 and /\_search?q=\_id:123456 ( we have redundant property "id" in each document that represents same value as actual \_id of the document )

I checked with HEAD / bigdesk / kopf plugins - they all report that all shards are in good standing. All servers are properly configured where 3 out of 4 servers are expected for MASTER failover switch

How can I identify what is wrong and how is it possible that the doc doesn't exist on every 2nd request?

Thank you for any help in advance.

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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 6, 2017, 12:09am UTC](https://discuss.elastic.co/t/data-inconsistency-document-exists-doesnt-exist-on-every-second-request/1972/2 "2017-07-06T00:09:30Z")

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