I had the same issue, I had to go into ADX user permissions and add the ADF as a "user"(app) with write permissions
Data load to ADX (Kusto) fails with error - UserErrorKustoWriteFailed
Siresh Peesa (HCL America Inc)
1
Reputation point Microsoft Employee
Failure happened on 'Sink' side. ErrorCode=UserErrorKustoWriteFailed,'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message=Failure status of the first blob that failed: Mapping reference 'TestTable' of type 'mappingReference' in database 'XXXXX' could not be found.,Source=Microsoft.DataTransfer.Runtime.KustoConnector,'
2 answers
Sort by: Newest
-
-
Vaibhav Chaudhari 38,601 Reputation points
2021-01-11T07:11:26.647+00:00 What is the source? Have you checked the mapping tab of copy activity? Ensure you have source columns mapped to target Kusto columns.