DWCopyCommandOperationFailed

Question

Why do I keep getting this error. I think I have checked all permissions, but I can't seem to resolve it. ErrorCode=DWCopyCommandOperationFailed,'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message='AzureSqlDW' Copy Command operation failed with error 'Not able to validate external location because The remote server returned an error: (403) Forbidden.'.,Source=Microsoft.DataTransfer.Connectors.MSSQLImport,''Type=Microsoft.Data.SqlClient.SqlException,Message=Not able to validate external location because The remote server returned an error: (403) Forbidden.,Source=Framework Microsoft SqlClient Data Provider,'

Answer 1

Hi Dana Brooks,

The COPY command failed because the SQL Dedicated Pool was using an identity that did not have permission to access the ADLS Gen2 storage path, which caused the validation step to return 403 Forbidden.

When you switched to a Notebook, it worked because the Notebook uses a different identity (such as your user identity or the Spark pool managed identity) that did have access to the storage account.

Permission mismatch — the identity used by COPY INTO did not have Storage Blob access.

Using the Notebook worked because it authenticated with an identity that already had correct storage permissions. To make COPY work, ensure the Synapse workspace or SQL pool managed identity has Storage Blob Data Reader/Contributor access.

Answer 2

The error DWCopyCommandOperationFailed that you are encountering indicates that the Copy Command operation has failed due to a 403 Forbidden error when attempting to validate an external location. This error often arises from permission issues or access restrictions related to the external resource.

Here are some troubleshooting steps to consider:

1. Permissions Check: Double-check that the account being used has the appropriate permissions to access the external location. This includes ensuring that both Azure Data Factory and the external data source have the necessary access rights.
2. External Location Configuration: Verify that the external location is set up correctly in Azure Data Factory. Ensure that the connection string and credentials are accurate and valid.
3. Network Configuration: Investigate any potential network issues that might be preventing access to the external location, such as firewalls or proxy settings that could block the connection.
4. Service Status: Confirm that the external service you are trying to access is operational and not undergoing maintenance or experiencing downtime.
5. Review Logs: Check the logs for more detailed error messages that could provide insights into why access was denied. This can help pinpoint the exact cause of the 403 Forbidden error.

If you have already verified permissions and continue to face this issue, consider revisiting the connection settings or consulting the relevant documentation for additional troubleshooting guidance.