# Can ES node rejoin the cluster after network failure?

**URL:** https://discuss.elastic.co/t/can-es-node-rejoin-the-cluster-after-network-failure/4652
**Category:** Elasticsearch
**Created:** [June 18, 2011, 8:42am UTC](https://discuss.elastic.co/t/can-es-node-rejoin-the-cluster-after-network-failure/4652 "2011-06-18T08:42:40Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Weiwei\_Wang](https://avatars.discourse-cdn.com/v4/letter/w/b19c9b/32.png) [@Weiwei\_Wang](https://discuss.elastic.co/u/Weiwei_Wang)
#### Post date: [June 18, 2011, 8:42am UTC](https://discuss.elastic.co/t/can-es-node-rejoin-the-cluster-after-network-failure/4652/1 "2011-06-18T08:42:40Z")

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I found that if the network failure happens, the es nodes who lost the  
master become master itself and then never come back.

I want the lost nodes can come back, otherwise i will lost some index  
data and have to restart the lost nodes.

?

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### Author: ![Lukas\_Vlcek1](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lukas_vlcek1/32/819_2.png) [@Lukas\_Vlcek1](https://discuss.elastic.co/u/Lukas_Vlcek1)
#### Post date: [June 19, 2011, 7:46am UTC](https://discuss.elastic.co/t/can-es-node-rejoin-the-cluster-after-network-failure/4652/2 "2011-06-19T07:46:36Z")

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Hi,

This is quite broad topic (and I am not expert in it). May be you  
should consider using shared gateway or increase number of index shard  
replicas. By the way this topic has been discussed on ML many times,  
usually they refer to network partitioning or brain split problems.  
For example check the following thread:  
[http://elasticsearch-users.115913.n3.nabble.com/CAP-theorem-td891925.html](http://elasticsearch-users.115913.n3.nabble.com/CAP-theorem-td891925.html)

Regards,  
Lukas

Dne sobota, 18. června 2011, Weiwei Wang [ww.wang.cs@gmail.com](mailto:ww.wang.cs@gmail.com) napsal(a):

> I found that if the network failure happens, the es nodes who lost the  
> master become master itself and then never come back.
> 
> I want the lost nodes can come back, otherwise i will lost some index  
> data and have to restart the lost nodes.
> 
> ?

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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, 4:03am UTC](https://discuss.elastic.co/t/can-es-node-rejoin-the-cluster-after-network-failure/4652/3 "2017-07-06T04:03:10Z")

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