# Attempted to send a bulk request to elasticsearch' but Elasticsearch appears to be unreachable
**URL:** https://discuss.elastic.co/t/attempted-to-send-a-bulk-request-to-elasticsearch-but-elasticsearch-appears-to-be-unreachable/204029
**Category:** Elasticsearch
**Created:** [October 17, 2019, 10:47am UTC](https://discuss.elastic.co/t/attempted-to-send-a-bulk-request-to-elasticsearch-but-elasticsearch-appears-to-be-unreachable/204029 "2019-10-17T10:47:00Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@wangzf](https://discuss.elastic.co/u/wangzf)
#### Post date: [October 17, 2019, 10:47am UTC](https://discuss.elastic.co/t/attempted-to-send-a-bulk-request-to-elasticsearch-but-elasticsearch-appears-to-be-unreachable/204029/1 "2019-10-17T10:47:00Z")
hi,i hava a question ,my cluster is green ,but my logstasht hava this error
Oct 15 09:17:16 logstashmysql logstash[14839]: [2019-10-15T09:17:16,974][WARN][logstash.outputs.elasticsearch] Marking url as dead. Last error: [LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError] Elasticsearch Unreachable: ...url=\>[http://172.31.1](http://172.31.1)
Oct 15 09:17:16 logstashmysql logstash[14839]: [2019-10-15T09:17:16,975][ERROR][logstash.outputs.elasticsearch] Attempted to send a bulk request to elasticsearch' but Elasticsearch appears to be unreachable or down! {:error\_message=\>"Elasticsearch Unreachable: [http:...
Oct 15 09:17:19 logstashmysql logstash[14839]: [2019-10-15T09:17:19,339][WARN][logstash.outputs.elasticsearch] Restored connection to ES instance {:url=\>"[http://172.31.182.177:9200/](http://172.31.182.177:9200/)"}
my logstash and elasticsearch configure is
node.name: elk1
node.master: true
node.data: false
path.data: /data/elasticsearch
path.logs: /var/log/elasticsearch
bootstrap.memory\_lock: true
transport.tcp.compress: true
thread\_pool:
write:
queue\_size: 2000
network.host: 0.0.0.0
http.port: 9200
discovery.zen.ping.unicast.hosts: ["elk1", "elk2","elk3","elk4","elk5","elk6","elk7","elk8","elk9","elk10"]
gateway.recover\_after\_nodes: 4
input {
kafka {
bootstrap\_servers =\> "172.31.182.167:9092,172.31.182.168:9092,172.31.182.169:9092"
topics =\> ["demo1"]
decorate\_events =\> true
codec =\> json
}
}
filter {
grok {
match =\> {"message" =\> "%{TIMESTAMP\_ISO8601:timestamp}"}
}
date {
match =\> ["timestamp","yyyy-MM-dd HH:mm:ss.SSS","yyyy-MM-dd HH:mm:ss.SSSSSS","ISO8601"]
target =\> "@timestamp"
}
}
output {
if[fields][logtype] == "ceph01\_ceph" {
elasticsearch {
hosts =\> ["172.31.182.162:9200","172.31.182.163:9200","172.31.182.177:9200","172.31.182.203:9200","172.31.182.204:9200","172.31.182.205:9200","172.31.182.210:9200"]
index =\> "ceph-%{+YYYY.MM.dd}"
}
}
}
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 14, 2019, 10:47am UTC](https://discuss.elastic.co/t/attempted-to-send-a-bulk-request-to-elasticsearch-but-elasticsearch-appears-to-be-unreachable/204029/2 "2019-11-14T10:47:06Z")
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