# Elasticsearch output connection pool error, with Linux VIP, but still indexing

**URL:** <https://discuss.elastic.co/t/elasticsearch-output-connection-pool-error-with-linux-vip-but-still-indexing/139427>\
**Category:** Logstash\
**Created:** [July 10, 2018, 8:40pm UTC](https://discuss.elastic.co/t/elasticsearch-output-connection-pool-error-with-linux-vip-but-still-indexing/139427 "2018-07-10T20:40:47Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![javadevmtl](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/javadevmtl/32/45613_2.png) [@javadevmtl](https://discuss.elastic.co/u/javadevmtl)\
**Post date:** [July 10, 2018, 8:40pm UTC](https://discuss.elastic.co/t/elasticsearch-output-connection-pool-error-with-linux-vip-but-still-indexing/139427/1 "2018-07-10T20:40:47Z")

</div>

Hi running 6.2.4

I have the following config...

```
elasticsearch {
  hosts => ["data6dev.marathon.l4lb.thisdcos.directory:9200"]
  user => "elastic"
  password => "xxxxxx"
  index => "dcos-%{+YYYY.MM.dd}"
}

```

data6dev.marathon.l4lb.thisdcos.directory:9200 is a Linux VIP which load balances to 3 data nodes.

Logs are being indexed to Elasticsearch, but I keep seeing this error...

> [2018-07-10T20:35:54,492][INFO][logstash.outputs.elasticsearch] Running health check to see if an Elasticsearch connection is working {:healthcheck\_url=\>[http://elastic:xxxxxx@data6dev.marathon.l4lb.thisdcos.directory:9200/](http://elastic:xxxxxx@data6dev.marathon.l4lb.thisdcos.directory:9200/), :path=\>"/"}  
> [2018-07-10T20:35:54,502][WARN][logstash.outputs.elasticsearch] UNEXPECTED POOL ERROR {:e=\>#\<LogStash::Outputs::Elasticsearch::HttpClient::Pool::NoConnectionAvailableError: No Available connections\>}  
> [2018-07-10T20:35:54,502][ERROR][logstash.outputs.elasticsearch] Attempted to send a bulk request to elasticsearch, but no there are no living connections in the connection pool. Perhaps Elasticsearch is unreachable or down? {:error\_message=\>"No Available connections", :class=\>"LogStash::Outputs::Elasticsearch::HttpClient::Pool::NoConnectionAvailableError", :will\_retry\_in\_seconds=\>4}  
> [2018-07-10T20:35:54,506][WARN][logstash.outputs.elasticsearch] Restored connection to ES instance {:url=\>"[http://elastic:xxxxxx@data6dev.marathon.l4lb.thisdcos.directory:9200/](http://elastic:xxxxxx@data6dev.marathon.l4lb.thisdcos.directory:9200/)"}

---

<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:** [August 7, 2018, 8:40pm UTC](https://discuss.elastic.co/t/elasticsearch-output-connection-pool-error-with-linux-vip-but-still-indexing/139427/2 "2018-08-07T20:40:59Z")

</div>

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