requests.exceptions.SSLError: HTTPSConnectionPool(host='api.hub.langchain.com', port=443)

[ashiwalv]

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Example Code

embeddings = OpenAIEmbeddings(openai_api_key='<API_KEY>')
vectorstore = FAISS.load_local(r'Project\faiss_project_index', embeddings)
print('vectorstore is loaded!')
retriever = vectorstore.as_retriever()
prompt = hub.pull("rlm/rag-prompt")
def format_docs(docs):
	return "\n\n".join(doc.page_content for doc in docs)

rag_chain = (
	{"context": retriever | format_docs, "question": RunnablePassthrough()}
	| prompt
	| llm
	| StrOutputParser()
)

Description

I am coding a RAG application with my already locally created FAISS vector database. Now, when I execute the above code, where I pass the vector database as a retriever along with my prompt, it goes into error.

Error logs:
`Traceback (most recent call last):
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\connectionpool.py", line 467, in _make_request
self._validate_conn(conn)
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\connectionpool.py", line 1099, in _validate_conn
conn.connect()
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\connection.py", line 653, in connect
sock_and_verified = _ssl_wrap_socket_and_match_hostname(
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\connection.py", line 806, in ssl_wrap_socket_and_match_hostname
ssl_sock = ssl_wrap_socket(
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\util\ssl.py", line 465, in ssl_wrap_socket
ssl_sock = ssl_wrap_socket_impl(sock, context, tls_in_tls, server_hostname)
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\util\ssl.py", line 509, in _ssl_wrap_socket_impl
return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\ssl.py", line 501, in wrap_socket
return self.sslsocket_class._create(
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\ssl.py", line 1041, in _create
self.do_handshake()
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\ssl.py", line 1310, in do_handshake
self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1129)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\connectionpool.py", line 793, in urlopen
response = self._make_request(
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\connectionpool.py", line 491, in _make_request
raise new_e
urllib3.exceptions.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1129)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\requests\adapters.py", line 486, in send
resp = conn.urlopen(
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\connectionpool.py", line 847, in urlopen
retries = retries.increment(
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\urllib3\util\retry.py", line 515, in increment
raise MaxRetryError(_pool, url, reason) from reason # type: ignore[arg-type]
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='api.hub.langchain.com', port=443): Max retries exceeded with url: /commits/rlm/rag-prompt/?limit=100&offset=0 (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1129)')))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users\Virendra\test_RAG.py", line 128, in
prompt = hub.pull("rlm/rag-prompt")
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\langchain\hub.py", line 80, in pull
resp: str = client.pull(owner_repo_commit)
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\langchainhub\client.py", line 251, in pull
commit_hash = self._get_latest_commit_hash(f"{owner}/{repo}")
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\langchainhub\client.py", line 176, in _get_latest_commit_hash
commits_resp = self.list_commits(repo_full_name)
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\langchainhub\client.py", line 150, in list_commits
res = requests.get(
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\requests\api.py", line 73, in get
return request("get", url, params=params, **kwargs)
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\requests\api.py", line 59, in request
return session.request(method=method, url=url, **kwargs)
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\requests\sessions.py", line 589, in request
resp = self.send(prep, **send_kwargs)
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\requests\sessions.py", line 703, in send
r = adapter.send(request, **kwargs)
File "C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\requests\adapters.py", line 517, in send
raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='api.hub.langchain.com', port=443): Max retries exceeded with url: /commits/rlm/rag-prompt/?limit=100&offset=0 (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1129)')))`

System Info

langchainhub = 0.1.14
langchain = 0.1.3
langchain-core = 0.1.17
langchain-community = 0.1.16
langchain-openai = 0.0.5
python = 3.11.0

[dosubot[bot]]

🤖

Hello again, @ashiwalv! Great to see you back and diving deeper into LangChain. Let's get you past this hurdle.

The error you're encountering is related to SSL certificate verification. It seems like the Python requests library is unable to verify the SSL certificate of the server it's trying to connect to (api.hub.langchain.com).

This issue can occur due to several reasons, such as:

• The server's SSL certificate is not installed correctly.
• The SSL certificate has expired.
• The Python environment does not have the necessary CA certificates to verify the server's SSL certificate.

Here are a few things you can try to resolve this issue:

1. Update your Python environment's CA certificates. If you're using a Python distribution like Anaconda, it should come with its own set of CA certificates. You can update these certificates using the conda command:

   conda update certifi

   If you're using a different Python distribution, you might need to install the CA certificates manually. The process for this can vary depending on your operating system and Python distribution.

2. Disable SSL certificate verification. While this is generally not recommended due to security reasons, you can disable SSL certificate verification in the Python requests library as a temporary workaround. You can do this by setting the verify parameter to False when making a request:

   requests.get(url, verify=False)

   Please note that this should only be used for testing purposes and should not be used in a production environment.

3. Check the server's SSL certificate. You can use an online SSL checker tool to verify if the server's SSL certificate is installed correctly and has not expired. If there are any issues with the server's SSL certificate, you might need to contact the server administrator to resolve them.

If none of the above solutions work, it would be helpful if you could provide more information about your Python environment and network configuration. This could help in identifying the root cause of the issue.

Sources

• libs/langchain/langchain/runnables/hub.py
• libs/community/langchain_community/embeddings/azure_openai.py

---

This response is meant to be useful and save you time. It is not meant to be a precise solution, but rather a starting point for your own research.

Help me be more useful! Please leave a 👍 if this is helpful and 👎 if it is irrelevant.

If you want to continue the conversation, start your reply with @dosu-bot.

[itech001]

how do you fix the error? we cannot change the lib C:\Users\Virendra\AppData\Local\Programs\Python\Python39\lib\site-packages\langchainhub\client.py.

how to add verify=False for requests?

[Rvn0xsy]

I am also facing the same issue and currently looking for a solution.

[inmanityus]

Same here, my imports are:

from langchain_community.utilities import GoogleSearchAPIWrapper
from langchain_core.tools import

I keep getting this exception:

Failed to get info from https://api.langchain.plus: SSLError(MaxRetryError("HTTPSConnectionPool(host='api.langchain.plus', port=443): Max retries exceeded with url: /info (Caused by SSLError(SSLEOFError(8, '[SSL: UNEXPECTED_EOF_WHILE_READING] EOF occurred in violation of protocol (_ssl.c:1000)')))"))

[moodys-onkar]

any update on this? This is still causing error for api.lanchain.hub. Please resolve this at the earliest.

[bhishanpdl]

I am also getting same error for this code:

from langchain import hub
prompt = hub.pull("rlm/rag-prompt")

Error

MaxRetryError: HTTPSConnectionPool(host='api.hub.langchain.com', port=443): Max retries exceeded with url: /info (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate in certificate chain (_ssl.c:1000)')))

[luccafabro]

Same error here

from langchain import hub
chat_prompt = hub.pull("langchain-ai/chat-langchain-rephrase")

langchain==0.2.5
langchain-community==0.2.5
langchain-core==0.2.9
langchain-elasticsearch==0.2.2
langchain-openai==0.1.9
langchain-text-splitters==0.2.1
langchainhub==0.1.20

[Mahendraprabhu-M]

this worked for me to disable the ssl:

import requests

session = requests.Session()
session.verify = False

requests.sessions.Session = lambda: session

obj = hub.pull("wfh/proposal-indexing")

[vpratik1981]

Run the following command to resolve the SSL exception error . This was caused due to the certificate not updated in Python .

pip3 install --upgrade certifi