[Bug]: Error when setting presigned expiry on Azure blob container

[isaac-jordan]

What happened?

When using LAKEFS_BLOCKSTORE_AZURE_PRE_SIGNED_EXPIRY environment variable, requesting data via the Python SDK results in the following exception:

lakefs.exceptions.ServerException: code: 500, reason: Internal Server Error, body: {'message': 'POST https://[redacted].blob.core.windows.net\n--------------------------------------------------------------------------------\nRESPONSE 400: 400 The value for one of the XML nodes is not in the correct format.\nERROR CODE: InvalidXmlNodeValue\n--------------------------------------------------------------------------------\n\ufeff<?xml version="1.0" encoding="utf-8"?><Error><Code>InvalidXmlNodeValue</Code><Message>The value for one of the XML nodes is not in the correct format.\nRequestId:[redacted]\nTime:2025-04-09T12:57:23.7801593Z</Message><XmlNodeName>2026-04-09T13:57:23Z</XmlNodeName><XmlNodeValue>2026-04-09T13:57:23Z</XmlNodeValue></Error>\n--------------------------------------------------------------------------------\n'}

Note, the XmlNodeName looks suspect:

<XmlNodeName>2026-04-09T14:06:22Z</XmlNodeName>
<XmlNodeValue>2026-04-09T14:06:22Z</XmlNodeValue>

Steps to Reproduce:

1. Set LAKEFS_BLOCKSTORE_AZURE_PRE_SIGNED_EXPIRY (e.g. 24h)
2. Attempt to read object using the Python SDK.

Expected behavior

No response

lakeFS version

No response

How lakeFS is installed

No response

Affected clients

No response

Relevant log output

Contact details

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