# Assistance required to recover an Elasticsearch cluster

**URL:** <https://discuss.elastic.co/t/assistance-required-to-recover-an-elasticsearch-cluster/151533>\
**Category:** Elasticsearch\
**Created:** [October 8, 2018, 10:59pm UTC](https://discuss.elastic.co/t/assistance-required-to-recover-an-elasticsearch-cluster/151533 "2018-10-08T22:59:43Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![tarpanpathak](https://avatars.discourse-cdn.com/v4/letter/t/0ea827/32.png) [@tarpanpathak](https://discuss.elastic.co/u/tarpanpathak)\
**Post date:** [October 8, 2018, 10:59pm UTC](https://discuss.elastic.co/t/assistance-required-to-recover-an-elasticsearch-cluster/151533/1 "2018-10-08T22:59:43Z")

</div>

I need some assistance in recovering an Elasticsearch cluster. Here are the environment details:

Elasticsearch version: 5.5.2  
Master nodes: 3  
Data nodes: 3  
Client nodes: 2

(Most recent) master nodes logs:  
_Note_: Each master node shows the same logs.

```auto
MasterNotDiscoveredException[null]
	at org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$5.onTimeout(TransportMasterNodeAction.java:234)
	at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:236)
	at org.elasticsearch.cluster.service.InternalClusterService$NotifyTimeout.run(InternalClusterService.java:804)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

```

(Most recent) data node logs:

```auto
MasterNotDiscoveredException[null]
	at org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$5.onTimeout(TransportMasterNodeAction.java:234)
	at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:236)
	at org.elasticsearch.cluster.service.InternalClusterService$NotifyTimeout.run(InternalClusterService.java:804)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

```

(Most recent) client node logs:

```auto
MasterNotDiscoveredException[null]
	at org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$5.onTimeout(TransportMasterNodeAction.java:234)
	at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:236)
	at org.elasticsearch.cluster.service.InternalClusterService$NotifyTimeout.run(InternalClusterService.java:804)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

```

I've tried re-creating the Master and Client nodes but it appears that the Masters do NOT join the cluster. Any help would be greatly appreciated.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [November 5, 2018, 10:59pm UTC](https://discuss.elastic.co/t/assistance-required-to-recover-an-elasticsearch-cluster/151533/2 "2018-11-05T22:59:46Z")

</div>

Closed on November 5, 2018, 10:59pm UTC

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