# Elasticsearch will not properly boot without localhost settings

**URL:** <https://discuss.elastic.co/t/elasticsearch-will-not-properly-boot-without-localhost-settings/238881>\
**Category:** Elasticsearch\
**Created:** [June 26, 2020, 3:19pm UTC](https://discuss.elastic.co/t/elasticsearch-will-not-properly-boot-without-localhost-settings/238881 "2020-06-26T15:19:29Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [June 26, 2020, 3:41pm UTC](https://discuss.elastic.co/t/elasticsearch-will-not-properly-boot-without-localhost-settings/238881/2 "2020-06-26T15:41:07Z")

</div>

Welcome!

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Here I think this message says it all:

```auto
[2020-06-25T20:00:36,455][ERROR][o.e.b.Bootstrap] [wazuh-log-vizualizer] Exception
java.lang.IllegalArgumentException: unknown setting [cluster.initial master nodes] please check that any required plugins are installed, or check the breaking changes documentation for removed settings

```

`cluster.initial master nodes` is not a know setting. Did you set `cluster.initial_master_nodes` or `cluster.initial master nodes`?

Could you share your full and correctly formatted `elasticsearch.yml` file?

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_[View the full topic](https://discuss.elastic.co/t/elasticsearch-will-not-properly-boot-without-localhost-settings/238881)._