# Node previously joined cluster. After esrally, master not discovered yet

**URL:** <https://discuss.elastic.co/t/node-previously-joined-cluster-after-esrally-master-not-discovered-yet/186650>\
**Category:** Elasticsearch\
**Created:** [June 20, 2019, 10:18am UTC](https://discuss.elastic.co/t/node-previously-joined-cluster-after-esrally-master-not-discovered-yet/186650 "2019-06-20T10:18:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![anon17386273](https://avatars.discourse-cdn.com/v4/letter/a/d2c977/32.png) [@anon17386273](https://discuss.elastic.co/u/anon17386273)\
**Post date:** [June 20, 2019, 10:18am UTC](https://discuss.elastic.co/t/node-previously-joined-cluster-after-esrally-master-not-discovered-yet/186650/1 "2019-06-20T10:18:09Z")

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I have 4 machines, each running 3 ES instances. (1 hot, 1 warm, 1 cold)  
Each instance is tied to a few data.path  
(Eg.  
Hot pointing to "/ssd1,/ssd2",  
warm pointing to "/hdd1, /hdd2",  
cold pointing to "/hdd3, /hdd4").  
The cluster was formed successfully

After running esrally several times to benchmark the performance, some of the instances started to disconnect from the cluster.  
In the logs, i see "master not discovered" and cluster\_uuid became "_na_".

I tried to restart the ES service but it still failed to join.  
Do i have to clean up the data and try again? Why is this behaviour happening?

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [June 20, 2019, 10:25am UTC](https://discuss.elastic.co/t/node-previously-joined-cluster-after-esrally-master-not-discovered-yet/186650/2 "2019-06-20T10:25:29Z")

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> [@anon17386273](#):
>
> In the logs, i see "master not discovered" and cluster\_uuid became " _na_ ".

Please show the entire log.  
Please make sure to format your code/logs/config using the `</>` button, or markdown style back ticks. It helps to make things easy to read which helps us help you 🙂

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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 18, 2019, 10:25am UTC](https://discuss.elastic.co/t/node-previously-joined-cluster-after-esrally-master-not-discovered-yet/186650/3 "2019-07-18T10:25:31Z")

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