Elasticsearch: ConnectionError

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sudo systemctl status elasticsearch
curl -X GET "localhost:9200"

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# /etc/elasticsearch/jvm.options
-Xms1g
-Xmx1g

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from elasticsearch import Elasticsearch

es = Elasticsearch(
    ['http://localhost:9200'],
    retry_on_timeout=True,
    max_retries=3
)

if es.ping():
    print("Connected")

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const { Client } = require('@elastic/elasticsearch');

const client = new Client({
  node: 'http://localhost:9200',
  maxRetries: 5,
  requestTimeout: 60000
});