# Setting number\_of\_replicas value to 0 makes the cluster unavailable
**URL:** https://discuss.elastic.co/t/setting-number-of-replicas-value-to-0-makes-the-cluster-unavailable/155083
**Category:** Elasticsearch
**Created:** [November 1, 2018, 9:17pm UTC](https://discuss.elastic.co/t/setting-number-of-replicas-value-to-0-makes-the-cluster-unavailable/155083 "2018-11-01T21:17:14Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@vnallamothu](https://discuss.elastic.co/u/vnallamothu)
#### Post date: [November 1, 2018, 9:17pm UTC](https://discuss.elastic.co/t/setting-number-of-replicas-value-to-0-makes-the-cluster-unavailable/155083/1 "2018-11-01T21:17:14Z")
I've installed elasticsearch 5.4 and kibana 5.4 on a single node cluster. after creating index, my shard status went to yellow. So, I thought to edit the number\_of\_replicas value in elasticsearch.yml to "0". Then I am getting following error:
```
[2018-11-01T17:01:10,966][WARN][o.e.b.ElasticsearchUncaughtExceptionHandler] [es-node01] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalArgumentException: unknown setting [number_of_replicas] please check that any required plugins are installed, or check the breaking changes documentation for removed settings
```
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [November 1, 2018, 9:17pm UTC](https://discuss.elastic.co/t/setting-number-of-replicas-value-to-0-makes-the-cluster-unavailable/155083/2 "2018-11-01T21:17:58Z")
> [@vnallamothu](#):
>
> unknown setting [number\_of\_replicas]
You need to do that via the API, it is no longer a setting in the config file.
---
### Author:  [@vnallamothu](https://discuss.elastic.co/u/vnallamothu)
#### Post date: [November 1, 2018, 9:22pm UTC](https://discuss.elastic.co/t/setting-number-of-replicas-value-to-0-makes-the-cluster-unavailable/155083/3 "2018-11-01T21:22:13Z")
> [@warkolm](#):
>
> number\_of\_replicas]
Can you please provide me with the required API call?
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [November 1, 2018, 9:29pm UTC](https://discuss.elastic.co/t/setting-number-of-replicas-value-to-0-makes-the-cluster-unavailable/155083/4 "2018-11-01T21:29:05Z")
`curl -H "Content-Type: application/json" -XPUT localhost:9200/*/_settings -d '{ "index" : { "number_of_replicas" : 0 } }'`
You can also update your templates to use no replicas.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 29, 2018, 9:29pm UTC](https://discuss.elastic.co/t/setting-number-of-replicas-value-to-0-makes-the-cluster-unavailable/155083/5 "2018-11-29T21:29:09Z")
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