Intermittent Synapse SQL Pool connectivity issue with Private endpoints

Question

Hi,

I am getting the below error when my data factory pipelines in the synpse Ayanlytics tries to access the SQL pool in the same Synapse workspace.

{ "errorCode": "2200", "message": "Failure happened on 'Sink' side. ErrorCode=SqlFailedToConnect,'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message=Cannot connect to SQL Database: 'tcp:xyz.sql.azuresynapse.net,1433', Database: 'xyz', User: ''. Check the linked service configuration is correct, and make sure the SQL Database firewall allows the integration runtime to access.,Source=Microsoft.DataTransfer.ClientLibrary,''Type=System.Data.SqlClient.SqlException,Message=Cannot open server 'xyz' requested by the login. Client with IP address 'xyz' is not allowed to access the server

I am using a self hosted IR and the subnet of the IR VM have the private endpoints setup for the synapse SQL pool.

This issue doesn't occur all the time but is intermittent.

Answer 1

Hello @Chakravarthi Lolla ,
Thanks for the ask and using the Microsoft Q&A platform .

You mentioned

This issue doesn't occur all the time but is intermittent.

This kind of issues needs a deeper look into the logs to check what happned in point in time . I think you can work with Microsoft support to resolution .

I think I suggest you to please add a retry and see if that helps .

Please do let me know how it goes .
Thanks
Himanshu
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Answer 2

Hi,

The issue doesnt seem to be specific to synapase as we are facing the issue not only in the pipelines but when conecting to the Synpase SQL or other Azure SQL from SSMS as well. It appears the issue is with the private endpoints