Question

A data engineer creates a OneLake shortcut in a Fabric lakehouse pointing to an Amazon S3 bucket. Yesterday the shortcut returned data correctly, but today all queries against the shortcut folder fail with an authorization/access error, while other native lakehouse tables work fine. No changes were made to the lakehouse itself. What is the MOST likely cause the engineer should investigate first?

Accepted Answer

The stored connection credentials (access key/secret) for the S3 shortcut have expired or been rotated at the source.

Answer

The Spark session pool ran out of executors and needs to be scaled up.

Answer

The lakehouse Delta tables require an OPTIMIZE and VACUUM to rebuild the shortcut metadata.

Answer

The workspace sensitivity label was changed, blocking access to shortcut data.