# Use index to judge data,but not found
**URL:** https://discuss.elastic.co/t/use-index-to-judge-data-but-not-found/350446
**Category:** Elasticsearch
**Created:** [January 5, 2024, 10:24am UTC](https://discuss.elastic.co/t/use-index-to-judge-data-but-not-found/350446 "2024-01-05T10:24:55Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@yunke\_yin](https://discuss.elastic.co/u/yunke_yin)
#### Post date: [January 5, 2024, 10:24am UTC](https://discuss.elastic.co/t/use-index-to-judge-data-but-not-found/350446/1 "2024-01-05T10:24:55Z")
please help me.
I got many data of the same type. In some cases, the known data must exist, but I need to further confirm which index the data is under. I chose to judge in the following way, but cannot found then throw exception.
This happens occasionally . elasticsearch version : 6.8.23，3 nodes
**example:**
```auto
( indexs is this type of elasticsearch indexs )
for (String index:indexs){
exists = client.prepareGet(index, model, id)
.setFetchSource(false)
.execute()
.actionGet().isExists();
if(exists){
return index;
}
}
throw new RuntimeException("cannot fount index");
```
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [January 5, 2024, 10:26am UTC](https://discuss.elastic.co/t/use-index-to-judge-data-but-not-found/350446/2 "2024-01-05T10:26:34Z")
> [@yunke\_yin](#):
>
> This happens occasionally . elasticsearch version : 6.8.23
This is a very old version, which has been EOL a long time. I would recommend you upgrade to a supported version.
What is the size, topology and configuration of your cluster?
---
### Author:  [@yunke\_yin](https://discuss.elastic.co/u/yunke_yin)
#### Post date: [January 5, 2024, 10:27am UTC](https://discuss.elastic.co/t/use-index-to-judge-data-but-not-found/350446/3 "2024-01-05T10:27:35Z")
3 nodes
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [January 5, 2024, 10:49am UTC](https://discuss.elastic.co/t/use-index-to-judge-data-but-not-found/350446/4 "2024-01-05T10:49:34Z")
How are they configured? If all your 3 nodes are master eligible, have you set `discovery.zen.minimum_master_nodes` in your config to `2` in order to avoid split brain scenarios?
---
### Author:  [@yunke\_yin](https://discuss.elastic.co/u/yunke_yin)
#### Post date: [January 8, 2024, 1:45am UTC](https://discuss.elastic.co/t/use-index-to-judge-data-but-not-found/350446/5 "2024-01-08T01:45:23Z")
yes, i do, and i checked the es log at that time and there was nothing abnormal.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 5, 2024, 1:46am UTC](https://discuss.elastic.co/t/use-index-to-judge-data-but-not-found/350446/6 "2024-02-05T01:46:19Z")
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