At end of October 2022 we saw an issue where a customer using PolyBase external query to Azure Storage started seeing queries fail with the following error:
Msg 7320, Level 16, State 110, Line 2
Cannot execute the query « Remote Query » against OLE DB provider « SQLNCLI11 » for linked server « (null) ». EXTERNAL TABLE access failed due to internal error: ‘Java exception raised on call to HdfsBridge_IsDirExist: Error [com.microsoft.azure.storage.StorageException: The server encountered an unknown failure: ]occurred while accessing external file.’
Prior to this, everything was working fine; the customer made no changes to SQL Server or Azure Storage.
« The