# Cluster intermittently goes down
**URL:** https://discuss.elastic.co/t/cluster-intermittently-goes-down/145106
**Category:** Elasticsearch
**Created:** [August 20, 2018, 7:34am UTC](https://discuss.elastic.co/t/cluster-intermittently-goes-down/145106 "2018-08-20T07:34:09Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@pradeep\_nair](https://discuss.elastic.co/u/pradeep_nair)
#### Post date: [August 20, 2018, 7:34am UTC](https://discuss.elastic.co/t/cluster-intermittently-goes-down/145106/1 "2018-08-20T07:34:09Z")
Hi ,
I have a cluster of 4 nodes. I see the nodes are unavailable intermittently.
I see the following error in the logs:
[2018-08-20T00:06:06,384][WARN][o.e.d.z.ZenDiscovery] [abc-node-1] master left (reason = transport disconnected), current nodes: nodes:
{abc-node-4}{XBPQiaQjRC6T4UfWp2KfBQ}{1k3msvKuQJKsEamzQ6WArA}{x.x.x.x}{x.x.x.x:9300}{ml.machine\_memory=16658407424, ml.max\_open\_jobs=20, xpack.installed=true, ml.enabled=true}
{anc-node-1}{1f7Z\_yOdSzq\_9oA3x2gbAw}{OzuEwx34TES9cyUjm31iwQ}{x.x.x.x}{x.x.x.x:9300}{ml.machine\_memory=16658407424, xpack.installed=true, ml.max\_open\_jobs=20, ml.enabled=true}, local
{abc-node-3}{Aj0XnCxZRqOc6UT-FlBmFQ}{i9lZu2tPSUaOMhUhmoKWJQ}{x.x.x.x}{x.x.x.x:9300}{ml.machine\_memory=16658407424, ml.max\_open\_jobs=20, xpack.installed=true, ml.enabled=true}, master
[2018-08-20T00:06:06,397][INFO][o.e.x.w.WatcherService] [abc-node-1] stopping watch service, reason [no master node]
[2018-08-20T00:06:10,141][WARN][o.e.d.z.UnicastZenPing] [abc-node-1] failed to send ping to [{abc-node-4}{XBPQiaQjRC6T4UfWp2KfBQ}{1k3msvKuQJKsEamzQ6WArA}{x.x.x.x}{x.x.x.x:9300}{ml.machine\_memory=16658407424, ml.max\_open\_jobs=20, xpack.installed=true, ml.enabled=true}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: [abc-node-4][x.x.x.x:9300][internal:discovery/zen/unicast] request\_id [78172] timed out after [3750ms]
at org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:979) [elasticsearch-6.3.0.jar:6.3.0]
at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:625) [elasticsearch-6.3.0.jar:6.3.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0\_171]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0\_171]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0\_171]
=========
elasticsearch.yml configuration:
cluster.name: dod-cluster
node.name: abc-node-1
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.bind\_host: 0.0.0.0
network.publish\_host: x.x.x.x
http.port: 9200
discovery.zen.ping.unicast.hosts: ["x.x.x.x", "x.x.x.x", "x.x.x.x", "x.x.x.x"]
transport.bind\_host: 0.0.0.0
transport.publish\_host: x.x.x.x
discovery.zen.fd.ping\_interval: 30s
discovery.zen.fd.ping\_retries: 3
Can some one please help me?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [September 17, 2018, 7:34am UTC](https://discuss.elastic.co/t/cluster-intermittently-goes-down/145106/2 "2018-09-17T07:34:10Z")
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