# The instance rejected the connection

**URL:** <https://discuss.elastic.co/t/the-instance-rejected-the-connection/307722>\
**Category:** Elasticsearch\
**Created:** [June 21, 2022, 6:51am UTC](https://discuss.elastic.co/t/the-instance-rejected-the-connection/307722 "2022-06-21T06:51:54Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ventsislav\_Kyorovski](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ventsislav_kyorovski/32/107326_2.png) [@Ventsislav\_Kyorovski](https://discuss.elastic.co/u/Ventsislav_Kyorovski)\
**Post date:** [June 21, 2022, 6:51am UTC](https://discuss.elastic.co/t/the-instance-rejected-the-connection/307722/1 "2022-06-21T06:51:54Z")

</div>

Hello everyone,

We use Elastic Cloud hosted on GCP, our production cluster is `1.41 TB storage, 32 GB RAM, 8 vCPU` split in 2 zones.

We have a Java application which uses the ES as a database and yesterday, when we hit 20+ request per second, the cluster started rejecting our request to it with 502 Bad Gateway

```auto
org.elasticsearch.client.ResponseException: method [POST], host [https://<name>.es.us-central1.gcp.cloud.es.io:9243], URI [/<index>/_count], status line [HTTP/1.1 502 Bad Gateway]
{"ok":false,"message":"The instance rejected the connection."}

```

This happens for some of the requests, not all of them during that period and as far as I can see all other requests are going smootless, like 5-10ms response time.

I managed to reproduce it from my local machine as well and if I change my IP the 502 Bad Gateway is gone, so I think it may be some kind of IP throttling?

Does anyone has any suggestions on this?

Thank you 🙂

---

<div class="post-metadata">

**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 21, 2022, 6:58am UTC](https://discuss.elastic.co/t/the-instance-rejected-the-connection/307722/2 "2022-06-21T06:58:45Z")

</div>

Welcome to our community! 😃

Yes there is rate limiting, [Rate limiting | Elasticsearch Service Documentation | Elastic](https://www.elastic.co/guide/en/cloud/current/ec-api-rate-limiting.html) goes into that.

---

<div class="post-metadata">

**Author:** ![Ventsislav\_Kyorovski](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ventsislav_kyorovski/32/107326_2.png) [@Ventsislav\_Kyorovski](https://discuss.elastic.co/u/Ventsislav_Kyorovski)\
**Post date:** [June 21, 2022, 7:08am UTC](https://discuss.elastic.co/t/the-instance-rejected-the-connection/307722/3 "2022-06-21T07:08:54Z")

</div>

Thank you for the fast answer @warkolm, but isn't those limitations for the Elasticsearch Service API

> A RESTful API is available with Elasticsearch Service, allowing you to perform most of the operations available in the UI console through API calls

Currently, when I call the Elasticsearch API it doesn't return the headers shown on the rate limit section

```auto
curl --location --request GET 'https://<cluster>.es.us-central1.gcp.cloud.es.io:9243/_cat/indices?v' \
--header 'Authorization: Basic <auth>' \
--data-raw ''

```

and one example response if that helps

```auto
< HTTP/2 200 
< content-type: text/plain; charset=UTF-8
< x-cloud-request-id: OBeXZnfqQLSJPVZX7VYNBw
< x-elastic-product: Elasticsearch
< x-found-handling-cluster: f3a79221db9f446fa0f40e17af27a1f2
< x-found-handling-instance: instance-0000000005
< content-length: 1096
< date: Tue, 21 Jun 2022 07:07:42 GMT
< 
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
green open metrics-endpoint.metadata_current_default 2nHVKcRcQOSeEhtlHXBv5Q 1 1 0 0 450b 225b
green open companies 1_nnZb28TfCAMiQf2iZ8tw 1 1 30794 2 38.2mb 19.1mb
green open events okU4LOwGS0iYhqKfjiXMvg 1 0 1729497 0 10.1gb 10.1gb
green open postings 28iJCXAfRzqkP9jEaS9ewQ 1 1 9710 3431 19mb 10.7mb
green open verified-companies aCnpyLF9TWiDpEIEVNMMzg 1 1 7845 240 966.7kb 472.1kb
green open .lists-default-000001 ec7xvxk4StyObA4vkq-TWg 1 1 0 0 450b 225b
green open .items-default-000001 X8BpGLTzTGW_RMUrtKnUyA 1 1 0 0 450b 225b

```

---

<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:** [July 19, 2022, 7:09am UTC](https://discuss.elastic.co/t/the-instance-rejected-the-connection/307722/4 "2022-07-19T07:09:19Z")

</div>

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