# Error while Configuring Cluster

**URL:** <https://discuss.elastic.co/t/error-while-configuring-cluster/3298>\
**Category:** Elasticsearch\
**Created:** [September 3, 2010, 8:24am UTC](https://discuss.elastic.co/t/error-while-configuring-cluster/3298 "2010-09-03T08:24:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![raindeepak4u](https://avatars.discourse-cdn.com/v4/letter/r/bc79bd/32.png) [@raindeepak4u](https://discuss.elastic.co/u/raindeepak4u)\
**Post date:** [September 3, 2010, 8:24am UTC](https://discuss.elastic.co/t/error-while-configuring-cluster/3298/1 "2010-09-03T08:24:27Z")

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Getting Error elasticsearch.MasterNotDiscovered Exception after configuring Cluster in elasticsearch.yml

Whats the easiest way to configure a Cluster . I am having three servers in LAN. do i need to restart all the servers, once Cluster configured i am not able to do a bulk indexing .

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 4:19am UTC](https://discuss.elastic.co/t/error-while-configuring-cluster/3298/2 "2017-07-06T04:19:47Z")

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Closed on July 6, 2017, 4:19am UTC