# Elasticsearch Unreachable error

**URL:** <https://discuss.elastic.co/t/elasticsearch-unreachable-error/205216>\
**Category:** Logstash\
**Created:** [October 25, 2019, 9:32am UTC](https://discuss.elastic.co/t/elasticsearch-unreachable-error/205216 "2019-10-25T09:32:49Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Leks](https://avatars.discourse-cdn.com/v4/letter/l/eb8c5e/32.png) [@Leks](https://discuss.elastic.co/u/Leks)\
**Post date:** [October 25, 2019, 9:32am UTC](https://discuss.elastic.co/t/elasticsearch-unreachable-error/205216/1 "2019-10-25T09:32:49Z")

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Hi all!  
I spent the whole night yesterday and the night before yesterday to solve this problem but I couldn't find any solution. What's important I configured all environment on the docker container. I want to send some raw data in .csv format to elasticsearch from logstash. When I try to do this after 20/30 minutes I got this warning:  
elasticsearch - Attempted to resurrect connection to dead ES instance, but got an error. {:url=\>"[http://localhost:9200/](http://localhost:9200/)", :error\_type=\>LogStash::Outputs::Elasticsearch::HttpClient::Pool::HostUnreachableError, :error=\>"Elasticsearch Unreachable: [[http://localhost:9200/](http://localhost:9200/)][Manticore::SocketException] Connection refused (Connection refused)"}  
I can connect with elasticsearch. **What's strange some data are uploaded to elasticsearch e.x I've got 1000000 rows and maybe half of them are loaded and suddenly we see this warning.** Any ideas what's wrong?  
I will be very grateful for your support because now I'm totally hopeless.

Below my\> data\_w.conf:

> input {  
> file {  
> path =\> "/etc/logstash/conf.d/data\_w.csv"  
> start\_position =\> "beginning"  
> sincedb\_path =\> "/dev/null"  
> }  
> }
> 
> filter {  
> csv {  
> separator =\> ","  
> columns =\> ['timestamp', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '50', '51', '52', '53', '54', '55', '56', '57', '58', '59', '60', '61', '62', '63', '64', '65', '66', '67', '68', '69', '70', '71', '72', '73', '74', '75', '76', '77', '78', '79', '80', '81', '82', '83', '84', '85', '86', '87', '88', '89', '90', '91', '92', '93', '94', '95', '96', '97', '98', '99', '100', '101', '102', '103', '104', '105', '106', '107', '108', '109', '110', '111', '112', '113', '114', '115', '116', '117', '118', '119', '120', '121', '122', '123', '124', '125', '126', '127', '128', '129', '130', '131', '132', '133', '134', '135', '136', '137', '138', '139', '140', '141', '142', '143', '144', '145', '146', '147', '148', '149', '150', '151', '152', '153', '154', '155', '156', '157', '158', '159', '160', '161', '162', '163', '164', '165', '166', '167', '168', '169', '170', '171', '172', '173', '174', '175', '176', '177', '178', '179', '180', '181', '182', '183', '184', '185', '186', '187', '188', '189', '190', '191', '192', '193', '194', '195', '196', '197', '198', '199', '200', '201']  
> }  
> }
> 
> output {  
> stdout {}  
> elasticsearch {  
> action =\> "index"  
> hosts =\> ["localhost:9200"]  
> index =\> "data\_w"  
> document\_type =\> "data"  
> }  
> }

I try to change hosts field to ["id\_container:9200"] but it doesn't help. I can create index and make visualization from website so elasticsearch, kibana and logstash should be configured correctly I suppose.

Waiting for your response!

---

<div class="post-metadata">

**Author:** ![Leks](https://avatars.discourse-cdn.com/v4/letter/l/eb8c5e/32.png) [@Leks](https://discuss.elastic.co/u/Leks)\
**Post date:** [November 15, 2019, 7:54am UTC](https://discuss.elastic.co/t/elasticsearch-unreachable-error/205216/2 "2019-11-15T07:54:41Z")

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I solved this problem and now everything works perfectly!!!! It turned out that my nginx blocked uploading user file if it's size is more than 1MB (it's default configuration). I set client\_max\_body\_size in nginx.conf file -\> [https://stackoverflow.com/questions/26717013/how-to-edit-nginx-conf-to-increase-file-size-upload](https://stackoverflow.com/questions/26717013/how-to-edit-nginx-conf-to-increase-file-size-upload)

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<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:** [December 13, 2019, 7:54am UTC](https://discuss.elastic.co/t/elasticsearch-unreachable-error/205216/3 "2019-12-13T07:54:41Z")

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