# Auto rejoin after network failure?

**URL:** <https://discuss.elastic.co/t/auto-rejoin-after-network-failure/12159>\
**Category:** Elasticsearch\
**Created:** [May 28, 2013, 11:38pm UTC](https://discuss.elastic.co/t/auto-rejoin-after-network-failure/12159 "2013-05-28T23:38:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![otisg](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/otisg/32/492_2.png) [@otisg](https://discuss.elastic.co/u/otisg)\
**Post date:** [May 28, 2013, 11:38pm UTC](https://discuss.elastic.co/t/auto-rejoin-after-network-failure/12159/1 "2013-05-28T23:38:18Z")

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Hi,

One of Sematext's customers recently had a few nodes get separated from the  
rest of the cluster due to a network issue.  
We don't have all the info yet, but it looks like the separated nodes  
didn't join the original cluster on their own after the network has been  
fixed, even though they didn't end up electing a master amongst themselves  
(because there were too few of them).

So, a couple of questions:

1. Do you consider a set of masterless nodes a cluster? Would you call it  
"a cluster" in ES context? Just curious if there should be a distinction  
between a true cluster with the master and a set of masterless nodes.

2. If the network was fixed after a while, should the separated masterless  
nodes not have rejoined the cluster automatically? Even if the network was  
down for a long time?

3. When nodes leave the cluster and find themselves floating around without  
a master, do they _continuously_ scream "Can you hear me, major Tom?", or  
do they give up after a while and switch to the "Here am I sitting in a tin  
can far above the world, Planet Earth is blue and there's nothing I can do"  
mode?

## Thanks, Otis

ELASTICSEARCH Performance Monitoring - [http://sematext.com/spm/index.html](http://sematext.com/spm/index.html)  
Search Analytics - [http://sematext.com/search-analytics/index.html](http://sematext.com/search-analytics/index.html)

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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, 2:34am UTC](https://discuss.elastic.co/t/auto-rejoin-after-network-failure/12159/2 "2017-07-06T02:34:17Z")

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