# Getting org.elasticsearch.discovery.MasterNotDiscoveredException, while I use only one node
**URL:** https://discuss.elastic.co/t/getting-org-elasticsearch-discovery-masternotdiscoveredexception-while-i-use-only-one-node/248662
**Category:** Elasticsearch
**Created:** [September 15, 2020, 11:04am UTC](https://discuss.elastic.co/t/getting-org-elasticsearch-discovery-masternotdiscoveredexception-while-i-use-only-one-node/248662 "2020-09-15T11:04:45Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@111320](https://discuss.elastic.co/u/111320)
#### Post date: [September 15, 2020, 11:04am UTC](https://discuss.elastic.co/t/getting-org-elasticsearch-discovery-masternotdiscoveredexception-while-i-use-only-one-node/248662/1 "2020-09-15T11:04:46Z")
I'm running elasticsearch (7.6.2) on RHEL 6.1 with only one node and I get:
```
org.elasticsearch.discovery.MasterNotDiscoveredException
```
org.elasticsearch.discovery.MasterNotDiscoveredException
This is my elasticsearch.yml:
```
> cluster.name: es-prod01
> node.name: node-1
>
> node.max_local_storage_nodes: 1
>
> path.data: /data/disk05,/data/disk06
>
> path.logs: /var/log/elasticsearch
>
> bootstrap.memory_lock: true
```
From all I read, it seems the configuration is good but I can't overcome this error.
Any ideas?
---
### Author:  [@111320](https://discuss.elastic.co/u/111320)
#### Post date: [September 16, 2020, 10:05am UTC](https://discuss.elastic.co/t/getting-org-elasticsearch-discovery-masternotdiscoveredexception-while-i-use-only-one-node/248662/2 "2020-09-16T10:05:15Z")
From elasticsearch [documentation](https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-node.html)
> "If you don’t configure this setting, then the node has the following roles by default: `master` , `data` , `ingest` , `ml`"
> Since I have only one node, and I didn't define node.roles I think the error "MasterNotDiscoveredException" should never raised.
How can it possible that elasticsearch instance don't find itself?
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [September 17, 2020, 12:09am UTC](https://discuss.elastic.co/t/getting-org-elasticsearch-discovery-masternotdiscoveredexception-while-i-use-only-one-node/248662/3 "2020-09-17T00:09:53Z")
Take a look at [https://www.elastic.co/guide/en/elasticsearch/reference/7.6/discovery-settings.html](https://www.elastic.co/guide/en/elasticsearch/reference/7.6/discovery-settings.html)
---
### Author:  [@111320](https://discuss.elastic.co/u/111320)
#### Post date: [September 17, 2020, 6:19am UTC](https://discuss.elastic.co/t/getting-org-elasticsearch-discovery-masternotdiscoveredexception-while-i-use-only-one-node/248662/4 "2020-09-17T06:19:26Z")
Thanks Mark.
I will describe what happen to my system maybe it will help others.
I has a system with 5 nodes. In some point I was asked to use only one node since this system wasn't in real use. So I moved all indices to one node and use it. All was good in the beginning but when I tried to save some visualizations and search I get errors. After investigation I found this discussion [Getting "master not discovered or elected yet" causing cluster not up in version 7.1.0](https://discuss.elastic.co/t/getting-master-not-discovered-or-elected-yet-causing-cluster-not-up-in-version-7-1-0/182489/20) and I saw David's answer about the problem that can be if some nodes were dropped from the system. I deleted all my data from `path.data` but I still had the same issue. After your answer I read [here](https://www.elastic.co/guide/en/elasticsearch/reference/7.6/modules-discovery-bootstrap-cluster.html) that in the first time we bootstrap a cluster we must define `cluster.initial_master_nodes` so I did it and now it looks good.
Thanks
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 15, 2020, 6:19am UTC](https://discuss.elastic.co/t/getting-org-elasticsearch-discovery-masternotdiscoveredexception-while-i-use-only-one-node/248662/5 "2020-10-15T06:19:39Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.