[Solved]-Elasticsearch exceptions ConnectionError


Connection refused means just that, that the TCP connection to the Elasticsearch HTTP service was refused. The reason can be a number of things, for instance that you are using the wrong host or port for the HTTP endpoint, or that the elasticsearch node is not running for some reason.

Before you try to use Haystack, test that elasticsearch works by issuing a direct HTTP request with something like:

curl -X GET

Where is the IP address of your elasticsearch node, and 9200 is the TCP port. When that succeeds, check and double check that you have the same URL configuration in you Haystack config.

    'default': {
        'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine',
        'URL': '',
        'INDEX_NAME': 'haystack',


I had the same problem. Just got it resolved by actually running the Elasticsearch on port 9200. If you are on windows, goto the bin directory of Elasticsearch installation and run the batch file of whichever Elasticsearch version you are using.



anton comment saved me!

I arrived here because I was trying to run elasticsearch-curator and I was getting the following error (even without Firewall or other connections blockers):

user@host:/opt/elasticsearch-curator$ curator_cli show-indices | more
2021-11-20 16:33:11,396 INFO      Instantiating client object
2021-11-20 16:33:11,397 INFO      Testing client connectivity
2021-11-20 16:33:11,403 ERROR     HTTP N/A error: HTTPConnectionPool(host='', port=9200): Max retries exceeded with url: / (Cause
d by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f5ca8ba7d60>: Failed to establish a new connection: [Errno 111] C
onnection refused'))
2021-11-20 16:33:11,403 CRITICAL  Curator cannot proceed. Exiting.

Due a lot of other particularities in my lab, I have the line network.hosts: in my /etc/elasticsearch/elasticsearch.yml, it means the private IP for that VM is fixed in the configuration, so my elasticsearch was not binding to all addresses as it should be in most cases.
The solution was to include an additional line network.bind_host: in the file /etc/elasticsearch/elasticsearch.yml.
This way, the network session of my /etc/elasticsearch/elasticsearch.yml is the following:

# ---------------------------------- Network -----------------------------------
# By default Elasticsearch is only accessible on localhost. Set a different
# address here to expose this node on the network:
# By default Elasticsearch listens for HTTP traffic on the first free port it
# finds starting at 9200. Set a specific HTTP port here:
http.port: 9200
# For more information, consult the network module documentation.

Now my elasticsearch-curator works great:

shaka@virgo:/opt/elasticsearch-curator$ sudo curator_cli show-indices | more
2021-11-20 17:30:02,294 INFO      Instantiating client object
2021-11-20 17:30:02,295 INFO      Testing client connectivity
/opt/python/3.9.4/lib/python3.9/site-packages/elasticsearch/connection/base.py:200: ElasticsearchWarning: Elasticsearch built-in security features are not enabled. Without authentication, your cluster could be accessible to anyone. See https://www.elastic.co/guide/en/elasticsearch/reference/7.15/security-minimal-setup.html to enable security.
2021-11-20 17:30:02,301 INFO      Successfully created Elasticsearch client object with provided settings
/opt/python/3.9.4/lib/python3.9/site-packages/elasticsearch/connection/base.py:200: ElasticsearchWarning: this request accesses system indices: [.apm-agent-configuration, .apm-custom-link, .async-search, .kibana_7.14.0_001, .kibana_7.14.1_001, .kibana_7.15.0_001, .kibana_7.15.1_001, .kibana_7.15.2_001, .kibana_task_manager_7.14.0_001, .kibana_task_manager_7.14.1_001, .kibana_task_manager_7.15.0_001, .kibana_task_manager_7.15.1_001, .kibana_task_manager_7.15.2_001, .tasks], but in a future major version, direct access to system indices will be prevented by default

I hope it helps someone facing the same problem.


I make it  sudo nano /etc/elasticsearch/elasticsearch.yml
network.host: 45.#.#.#
transport.host: localhost

It works for me

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