# The confusion of configuring cluster.initial\_master\_nodes

**URL:** <https://discuss.elastic.co/t/the-confusion-of-configuring-cluster-initial-master-nodes/229213>\
**Category:** Elasticsearch\
**Created:** [April 22, 2020, 9:09am UTC](https://discuss.elastic.co/t/the-confusion-of-configuring-cluster-initial-master-nodes/229213 "2020-04-22T09:09:03Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![yc1024](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yc1024/32/42644_2.png) [@yc1024](https://discuss.elastic.co/u/yc1024)\
**Post date:** [April 23, 2020, 9:17am UTC](https://discuss.elastic.co/t/the-confusion-of-configuring-cluster-initial-master-nodes/229213/9 "2020-04-23T09:17:19Z")

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Unfortunately，i haven't modified it since I configured cluster.initial\_master\_nodes and discovery.seed\_hosts, and this is the first time I started the newly installed cluster.  
This is the second time I have encountered this problem.

I once asked such a question：

> [@Why node uuid replace by {bootstrap-placeholder}-{NodeName}](https://discuss.elastic.co/t/why-node-uuid-replace-by-bootstrap-placeholder-nodename/225869/2):
>
> At the time the cluster bootstrapped, it did not know the ID of master 3 so it uses a placeholder that will be replaced with master 3's ID later. This is quite a low-level implementation detail that almost certainly isn't relevant to your problem You did not set cluster.initial\_master\_nodes to the same value on all three nodes, or you have changed it after the first time you started these nodes. Not obviously, but if you changed cluster.initial\_master\_nodes then that was wrong.

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