Form Recognizer: Failed to establish a new connection: [Errno -2] Name or service not known

Mayank Dixit 10

Hi, I am experiencing an issue with the Form Recognizer service. Sometimes it works perfectly, but at other times, it throws the following error:

azure.core.exceptions.ServiceRequestError: <urllib3.connection.HTTPSConnection object at 0xffff7da8c1f0>: Failed to establish a new connection: [Errno -2] Name or service not known

I need help in resolving this issue.

YutongTie-MSFT 48,586 Reputation points

2023-04-06T16:16:41.86+00:00

Hello @Mayank Dixit Thanks a lot for reaching out to us, may I know when the error happened, in Studio or in SDK? Is there any code sample you are following which cause the issue from time to time? Which region and tier you are in?

Mayank Dixit 10

Hi @YutongTie-MSFT

Thanks for the reply, please find the information below:

I've created a pipeline that runs OCR on documents uploaded to a blob container. The process involves breaking the PDF into pages, running OCR on each page, and then combining the results. Now, it is working fine most of the time, but sometimes I encounter the following error:

azure.core.exceptions.ServiceRequestError: <urllib3.connection.HTTPSConnection object at 0xffff7da8c1f0>: Failed to establish a new connection: [Errno -2] Name or service not known

The SDKs I'm using include: nullnullnull

Here's the code I'm using:

from azure.ai.formrecognizer import DocumentAnalysisClient
from azure.core.credentials import AzureKeyCredential
from azure.storage.blob import BlobServiceClient
from PyPDF2 import PdfReader, PdfWriter
from concurrent.futures import ThreadPoolExecutor, as_completed
import io
client = DocumentAnalysisClient(endpoint=endpoint, credential=AzureKeyCredential(key))
def process_page(page_data, page_number, file_name):
    logger.info("Processing page: " + str(page_number))
    poller = client.begin_analyze_document("prebuilt-document", page_data)
    result = poller.result()
    return result
def analyze_read(blob_name):
    logger.info("Processing file: " + blob_name)
    blob_service_client = BlobServiceClient.from_connection_string(connection_string)
    blob_client = blob_service_client.get_blob_client(container=container_name, blob=blob_name)
    pdf_data = blob_client.download_blob().readall()
    
    pdf_reader = PdfReader(io.BytesIO(pdf_data))
    num_pages = len(pdf_reader.pages)
    
    page_data_list = []
    for page_num in range(num_pages):
        pdf_writer = PdfWriter()
        pdf_writer.add_page(pdf_reader.pages[page_num])
        page_data = io.BytesIO()
        pdf_writer.write(page_data)
        page_data.seek(0)
        page_data_list.append(page_data)
    # Process pages in parallel using ThreadPoolExecutor
    with ThreadPoolExecutor() as executor:
        futures = [
            executor.submit(process_page_wrapper, (page_data, i + 1, blob_name))
            for i, page_data in enumerate(page_data_list)
        ]
        results = [future.result() for future in as_completed(futures)]

I am using the standard tier, and my region is East US.

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Form Recognizer: Failed to establish a new connection: [Errno -2] Name or service not known