How to fix "EOF occurred in violation of protocol" with download_blob() in Python?

Question

I have python code that is trying to read a file in blob storage. I get this error:

azure.core.exceptions.ServiceRequestError: EOF occurred in violation of protocol (_ssl.c:1007)

after running:

blob_client.download_blob()

What am I doing wrong?

Answer 1

Hello @Matt Schwartz

The error message you are seeing is related to SSL protocol.

It is possible that the SSL connection is being closed unexpectedly. This can happen due to a number of reasons, such as network issues or server-side issues. To fix this issue, you can try the following steps:

1. Upgrade the Azure Storage Blob client library for Python to the latest version. You can do this by running the following command: pip install --upgrade azure-storage-blob
2. Try setting the max_concurrency parameter to a lower value when calling the download_blob() method. This can help reduce the load on the server and prevent the SSL connection from being closed unexpectedly. For example: blob_client.download_blob(max_concurrency=1)
3. If the issue persists, you can try disabling SSL verification by setting the verify parameter to False when creating the BlobServiceClient or BlobClient object. However, this is not recommended for security reasons. For example: from azure.storage.blob import BlobServiceClient blob_service_client = BlobServiceClient.from_connection_string(conn_str, verify=False)

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