Error LogStash::Inputs::Elasticsearch

Hello everyone,

I have a .conf file which I will execute (logstash -f file.conf -w 1) to extract data from ES to a csv file.
I can do it perfectly on my dev machine.

The problem is when we try to execute it on machine, it'll return an error.

"/logstash-6.3.0/bin/logstash" -f "/file.conf" -w 1

Sending Logstash's logs to /products/duas_data/LR_RE7/nodefiles/logstash-6.3.0/logs which is now configured via log4j2.properties
[2018-07-09T12:11:18,588][WARN ][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified
[2018-07-09T12:11:19,175][INFO ][logstash.runner          ] Starting Logstash {"logstash.version"=>"6.3.0"}
[2018-07-09T12:11:21,588][INFO ][logstash.pipeline        ] Starting pipeline {:pipeline_id=>"main", "pipeline.workers"=>1, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>50}
[2018-07-09T12:11:22,148][INFO ][logstash.pipeline        ] Pipeline started successfully {:pipeline_id=>"main", :thread=>"#<Thread:0x112db412 run>"}
[2018-07-09T12:11:22,287][INFO ][logstash.agent           ] Pipelines running {:count=>1, :running_pipelines=>[:main], :non_running_pipelines=>[]}
[2018-07-09T12:11:22,946][INFO ][logstash.agent           ] Successfully started Logstash API endpoint {:port=>9600}
[2018-07-09T12:11:23,311][ERROR][logstash.pipeline        ] A plugin had an unrecoverable error. Will restart this plugin.
  Pipeline_id:main
  Plugin: <LogStash::Inputs::Elasticsearch hosts=>["xxx"], index=>"xxx", scroll=>"1m", query=>"{\"query\": {\"match_all\":{}},\"sort\": [\"xxx\"]}", id=>"fecdd943a2e091f4f31552dc9ad7facf609d1134aa80144bfb872551c455a193", enable_metric=>true, codec=><LogStash::Codecs::JSON id=>"json_2e7bb0a1-898b-4f9d-9a2c-31cde42037cf", enable_metric=>true, charset=>"UTF-8">, size=>1000, docinfo=>false, docinfo_target=>"@metadata", docinfo_fields=>["_index", "_type", "_id"], ssl=>false>
  Error: [411] 
<html><head>
<meta type="copyright" content="Copyright (C) 1996-2016 The Squid Software Foundation and contributors">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>ERREUR : l'URL demandée n'a pas pu être chargée</title>
<style type="text/css"><!-- 
 ...

I've found this similar github issue:

But no one replied.

Does anyone know how we can solve this issue?

Thanks in advance

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