Elasticsearch connection error

[laifuchicago]

To whom it may concern:
I have tried to convert to Elasticsearch, but there occured some problems just like this:
02/10/2020 13:58:04 - WARNING - elasticsearch - HEAD http://172.21.37.55:9200:9200/document [status:N/A request:0.027s]
Traceback (most recent call last):
File "/home/sung/anaconda3/lib/python3.7/site-packages/urllib3/connection.py", line 159, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "/home/sung/anaconda3/lib/python3.7/site-packages/urllib3/util/connection.py", line 57, in create_connection
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
File "/home/sung/anaconda3/lib/python3.7/socket.py", line 748, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known

Do you have any idea? Thank you.
                                                            Jonathan

[tholor]

Hey @laifuchicago,

Thanks for reporting. Could you please provide a bit more information on your case so that we can try to replicate it:

• How are you running Elasticsearch? Are you using a local docker as described in the README (docker run -d -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.5.1)?
• How do you initialize the ElasticsearchDocumentStore?
• What Retriever are you using?

Thanks!

[laifuchicago]

To Tholor:
This is my code, and I have run the docker run
from haystack import Finder
#from haystack.database.sql import SQLDocumentStore
from haystack.database.elasticsearch import ElasticsearchDocumentStore
from haystack.indexing.cleaning import clean_wiki_text
from haystack.indexing.io import write_documents_to_db, fetch_archive_from_http
from haystack.reader.farm import FARMReader
from haystack.reader.transformers import TransformersReader
from haystack.utils import print_answers
from elasticsearch import Elasticsearch

document_store = ElasticsearchDocumentStore(host="localhost:9200",username="", password="", index="squad500")

[laifuchicago]

I guess it's the elasticsearch_dsl error, we can not import that, my elasticsearch_dsl version is 7.1.0 and elasticsearch is 7.5.1

[tholor]

The versions should be fine.
However, you initialize the DocumentStore slightly wrong. Can you please try the following:

document_store = ElasticsearchDocumentStore(host="localhost", username="", password="", index="document")

host doesn't expect a port number.

I also just saw that the index name is currently bound to "document". We will add a PR to allow flexible naming here ...
@tanaysoni can you please implement this? I think the issue is that we don't initialize the index correctly:

haystack/haystack/database/elasticsearch.py

Lines 6 to 12 in d33ef9c

	class Document(ESDoc):
	name = Text()
	text = Text()
	tags = Text()
	class Index:
	name = "document"

[jyotikhetan]

hi, @tholor Can't we use Elasticsearch directly from the source..??
I tried using it, I am getting errors saying the connection is refused...& elastic search is getting killed itself..!!

f"Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance at {hosts} and that it has finished the initial ramp up (can take > 30s).")
ConnectionError: Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance at [{'host': 'localhost', 'port': 9200}] and that it has finished the initial ramp up (can take > 30s).

[tholor]

Hey @jyotikhetan , What do you mean by "directly from the source"?
If you mean running elasticsearch via a daemon like this, it is definitely possible:

import os
from subprocess import Popen, PIPE, STDOUT
es_server = Popen(['elasticsearch-7.9.2/bin/elasticsearch'],
                   stdout=PIPE, stderr=STDOUT,
                   preexec_fn=lambda: os.setuid(1)  # as daemon
                  )

In the end you can run elasticsearch as you wish (docker, daemon, remote cloud service ...). I'd suspect some network issues or elasticsearch has not fully started yet. Maybe try a simple curl to elasticsearch (outside of Haystack) to verify that it is up and running correctly.

[jaehyeongAN]

Hi, I have the same issue!

from haystack.document_store import ElasticsearchDocumentStore

ES_HOST = 'host ip' # my host ip
document_store = ElasticsearchDocumentStore(ES_HOST)

The above code works normally when connecting to 'localhost' after docker runs on a local PC, but an error occurs when accessing an external Elasticsearch IP!

and below is the error log.

Traceback (most recent call last):
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/elasticsearch/connection/http_urllib3.py", line 246, in perform_request
    method, url, body, retries=Retry(False), headers=request_headers, **kw
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connectionpool.py", line 756, in urlopen
    method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/util/retry.py", line 507, in increment
    raise six.reraise(type(error), error, _stacktrace)
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/packages/six.py", line 770, in reraise
    raise value
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connectionpool.py", line 706, in urlopen
    chunked=chunked,
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connectionpool.py", line 394, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connection.py", line 239, in request
    super(HTTPConnection, self).request(method, url, body=body, headers=headers)
  File "/usr/local/lib/python3.7/http/client.py", line 1277, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/local/lib/python3.7/http/client.py", line 1323, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/local/lib/python3.7/http/client.py", line 1272, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/local/lib/python3.7/http/client.py", line 1032, in _send_output
    self.send(msg)
  File "/usr/local/lib/python3.7/http/client.py", line 972, in send
    self.connect()
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connection.py", line 205, in connect
    conn = self._new_conn()
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connection.py", line 187, in _new_conn
    self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7fec5925d510>: Failed to establish a new connection: [Errno -2] Name or service not known
11/17/2021 18:53:50 - WARNING - elasticsearch -   HEAD http://http://bb8-elasticsearch-prod.okc1.opsnow.com/:9300/ [status:N/A request:0.000s]
Traceback (most recent call last):
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connection.py", line 175, in _new_conn
    (self._dns_host, self.port), self.timeout, **extra_kw
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/util/connection.py", line 73, in create_connection
    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
  File "/usr/local/lib/python3.7/socket.py", line 752, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/elasticsearch/connection/http_urllib3.py", line 246, in perform_request
    method, url, body, retries=Retry(False), headers=request_headers, **kw
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connectionpool.py", line 756, in urlopen
    method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/util/retry.py", line 507, in increment
    raise six.reraise(type(error), error, _stacktrace)
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/packages/six.py", line 770, in reraise
    raise value
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connectionpool.py", line 706, in urlopen
    chunked=chunked,
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connectionpool.py", line 394, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connection.py", line 239, in request
    super(HTTPConnection, self).request(method, url, body=body, headers=headers)
  File "/usr/local/lib/python3.7/http/client.py", line 1277, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/local/lib/python3.7/http/client.py", line 1323, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/local/lib/python3.7/http/client.py", line 1272, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/local/lib/python3.7/http/client.py", line 1032, in _send_output
    self.send(msg)
  File "/usr/local/lib/python3.7/http/client.py", line 972, in send
    self.connect()
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connection.py", line 205, in connect
    conn = self._new_conn()
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/urllib3/connection.py", line 187, in _new_conn
    self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7fec59268650>: Failed to establish a new connection: [Errno -2] Name or service not known
Traceback (most recent call last):
  File "/home/jaehyeong/venv_py37/lib/python3.7/site-packages/haystack/document_store/elasticsearch.py", line 202, in _init_elastic_client
    f"Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance "
ConnectionError: Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance at `[{'host': 'http://bb8-elasticsearch-prod.okc1.opsnow.com/', 'port': 9300}]` and that it has finished the initial ramp up (can take > 30s).

But, as shown in the code below, when connected directly to Elasticsearch, it worked fine.

from elasticsearch import Elasticsearch

ES_HOST = 'host ip' # my host ip
es = Elasticsearch(ES_HOST)
es.info() 

# {'name': 'bb8-elasticsearch-0', 'cluster_name': 'elasticsearch', 'cluster_uuid': 'CgeTCo1QT96Hy0cDOy15pw', 'version': {'number': '7.15.0', 'build_flavor': 'default', 'build_type': 'docker', 'build_hash': '79d65f6e357953a5b3cbcc5e2c7c21073d89aa29', 'build_date': '2021-09-16T03:05:29.143308416Z', 'build_snapshot': False, 'lucene_version': '8.9.0', 'minimum_wire_compatibility_version': '6.8.0', 'minimum_index_compatibility_version': '6.0.0-beta1'}, 'tagline': 'You Know, for Search'}

[chicuong209]

@jaehyeongAN Did you resolve this issue? If yes, could you please share your solution?

[jaehyeongAN]

@chicuong209 My exteral Elasticsearch IP was cloud service. So, access was only available by https. I added parameter of 'sheme'

document_store = ElasticsearchDocumentStore(
    host=es_host,
    port=es_port,
    scheme='https',
           :
)

I am using ElasticSearch version 8.5.1 and the latest python library of ElasticSearch concurrent with version 8.5.1.

I am also having trouble with ElasticsearchDocumentStore. After following the ElasticSearch instructions [here] for deploying an instance of a single node in a container using a docker image (https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html), I was able to run the following 2 code blocks successfully:

import requests
from datetime import datetime
from elasticsearch import Elasticsearch
from elasticsearch import RequestsHttpConnection

client = Elasticsearch( [{ 'host': '127.0.0.1', 'port': 9200,'scheme': 'https'}], ca_certs="../http_ca.crt", http_auth=('username', 'password'))
resp = client.info()
resp  # this executed correctly

and this:

r = requests.get('https://localhost:9200/_cluster/health', verify="../http_ca.crt", headers={"Authorization": 'Basic ' + TOKEN})
r.json()

Then I tried

from haystack.document_stores.elasticsearch import ElasticsearchDocumentStore

doc_store = ElasticsearchDocumentStore(
    host="localhost",
    port=9200,
    scheme="https",
    username = "username",
    password = "password",
    index = "doc1",

)

and no matter what I try above, I get this error:

Output exceeds the size limit. Open the full output data in a text editor
WARNING:elasticsearch:GET https://localhost:9200/ [status:N/A request:0.029s]
Traceback (most recent call last):
File "c:\Users\k.mufti\Desktop\QA_system.venv\lib\site-packages\urllib3\connectionpool.py", line 703, in urlopen
httplib_response = self._make_request(
File "c:\Users\k.mufti\Desktop\QA_system.venv\lib\site-packages\urllib3\connectionpool.py", line 386, in _make_request
self._validate_conn(conn)
File "c:\Users\k.mufti\Desktop\QA_system.venv\lib\site-packages\urllib3\connectionpool.py", line 1042, in validate_conn
conn.connect()
File "c:\Users\k.mufti\Desktop\QA_system.venv\lib\site-packages\urllib3\connection.py", line 414, in connect
self.sock = ssl_wrap_socket(
File "c:\Users\k.mufti\Desktop\QA_system.venv\lib\site-packages\urllib3\util\ssl.py", line 449, in ssl_wrap_socket
ssl_sock = ssl_wrap_socket_impl(
File "c:\Users\k.mufti\Desktop\QA_system.venv\lib\site-packages\urllib3\util\ssl.py", line 493, in _ssl_wrap_socket_impl
return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
File "C:\Python310\lib\ssl.py", line 512, in wrap_socket
return self.sslsocket_class._create(
File "C:\Python310\lib\ssl.py", line 1070, in _create
self.do_handshake()
File "C:\Python310\lib\ssl.py", line 1341, in do_handshake
self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:997)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
...
self.do_handshake()
File "C:\Python310\lib\ssl.py", line 1341, in do_handshake
self._sslobj.do_handshake()
urllib3.exceptions.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:997)
Output exceeds the size limit. Open the full output data in a text editor

ConnectionError Traceback (most recent call last)
File c:\Users\k.mufti\Desktop\QA_system.venv\lib\site-packages\haystack\document_stores\elasticsearch.py:272, in ElasticsearchDocumentStore._init_elastic_client(cls, host, port, username, password, api_key_id, api_key, aws4auth, scheme, ca_certs, verify_certs, timeout, use_system_proxy)
271 if not status:
--> 272 raise ConnectionError(
273 f"Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance "
274 f"at {hosts} and that it has finished the initial ramp up (can take > 30s)."
275 )
276 except Exception:

ConnectionError: Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance at [{'host': 'localhost', 'port': 9200}] and that it has finished the initial ramp up (can take > 30s).

During handling of the above exception, another exception occurred:

ConnectionError Traceback (most recent call last)
Cell In [97], line 1
----> 1 doc_store = ElasticsearchDocumentStore(
2 host="localhost",
3 port=9200,
4 scheme="https",
5 username = "username",
6 password = "password",
7 index = "aurelius",
8
9 )
...
278 f"Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance at {hosts} and that it has finished the initial ramp up (can take > 30s)."
279 )
280 return client

ConnectionError: Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance at [{'host': 'localhost', 'port': 9200}] and that it has finished the initial ramp up (can take > 30s).

Any ideas or solutions?

[devvspaces]

Just for others, i used Elastic version 8, i tried the method above but added certs to the function

document_store = ElasticsearchDocumentStore(host="localhost", username="elastic", password="***", index="document", scheme="https", ca_certs="./http_ca.crt")

[slavaGanzin]

This worked for me with 8.10.2

  elasticsearch:
    image: "docker.elastic.co/elasticsearch/elasticsearch:8.10.2"
    ports:
      - 9200:9200
    restart: on-failure
    environment:
      - xpack.security.enabled=false
      - xpack.license.self_generated.type=basic
      - network.host=0.0.0.0
      ...