topic VNet Data Gateway unable to connect to Azure Databricks Serverless SQL via Private Endpoint in Administration & Architecture https://community.databricks.com/t5/administration-architecture/vnet-data-gateway-unable-to-connect-to-azure-databricks/m-p/155744#M5200 <DIV><P>I’m facing connectivity issues when trying to connect <STRONG>Microsoft Fabric / Power BI</STRONG> to <STRONG>Azure Databricks Serverless and PRO SQL Warehouse</STRONG> using a <STRONG>VNet Data Gateway</STRONG>. I’m looking for guidance on whether this scenario is supported or if there are known limitations.</P><H4>Current setup</H4><UL><LI>Azure Databricks workspace and <STRONG>VNet Data Gateway subnet are in the same VNet</STRONG></LI><LI>Databricks is accessed via <STRONG>Private Endpoint</STRONG></LI><LI>Gateway subnet:<UL><LI>Has outbound access to api.powerbi.com on TCP 443</LI><LI>Has outbound access to Azure Databricks Private Endpoint on TCP 443</LI></UL></LI><LI>NSG diagnostics (Gateway → Databricks PE :443) are <STRONG>successful</STRONG></LI><LI>No UDRs, no forced tunneling, system routes only</LI><LI>Corporate firewall is <STRONG>not in the traffic path</STRONG></LI><LI>Databricks Serverless SQL Warehouse works fine from Databricks SQL UI</LI></UL><H4>&nbsp;Issue observed</H4><P><STRONG>When testing or creating the connection via VNet Data Gateway, I consistently get errors like:</STRONG>VNet Data Gateway 01: ODBC: ERROR [HY000] [Microsoft][ThriftExtension] (14) Unexpected response from server during a HTTP connection: connect() failed: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond..Session Id: 2ece67bd-78ed-4f9e-ad67-f7c95fd1379a<BR />RequestId: 6a566442-3d6b-4b5c-8be9-c735022fbab8<BR />Cluster URI: <A href="https://api.powerbi.com" target="_blank" rel="noopener">https://api.powerbi.com</A><BR />Status code: 400<BR />Time: Tue Apr 28 2026 09:10:52 GMT+0000 (Coordinated Universal Time)</P><UL><LI>The error always references api.powerbi.com</LI><LI>No queries appear in Databricks SQL Warehouse query history</LI><LI>No useful logs are available on Databricks side</LI><LI>Gateway diagnostics show “Network alias interface: Ethernet” (default)</LI></UL></DIV> Tue, 28 Apr 2026 21:49:33 GMT LokeshChikuru 2026-04-28T21:49:33Z VNet Data Gateway unable to connect to Azure Databricks Serverless SQL via Private Endpoint https://community.databricks.com/t5/administration-architecture/vnet-data-gateway-unable-to-connect-to-azure-databricks/m-p/155744#M5200 <DIV><P>I’m facing connectivity issues when trying to connect <STRONG>Microsoft Fabric / Power BI</STRONG> to <STRONG>Azure Databricks Serverless and PRO SQL Warehouse</STRONG> using a <STRONG>VNet Data Gateway</STRONG>. I’m looking for guidance on whether this scenario is supported or if there are known limitations.</P><H4>Current setup</H4><UL><LI>Azure Databricks workspace and <STRONG>VNet Data Gateway subnet are in the same VNet</STRONG></LI><LI>Databricks is accessed via <STRONG>Private Endpoint</STRONG></LI><LI>Gateway subnet:<UL><LI>Has outbound access to api.powerbi.com on TCP 443</LI><LI>Has outbound access to Azure Databricks Private Endpoint on TCP 443</LI></UL></LI><LI>NSG diagnostics (Gateway → Databricks PE :443) are <STRONG>successful</STRONG></LI><LI>No UDRs, no forced tunneling, system routes only</LI><LI>Corporate firewall is <STRONG>not in the traffic path</STRONG></LI><LI>Databricks Serverless SQL Warehouse works fine from Databricks SQL UI</LI></UL><H4>&nbsp;Issue observed</H4><P><STRONG>When testing or creating the connection via VNet Data Gateway, I consistently get errors like:</STRONG>VNet Data Gateway 01: ODBC: ERROR [HY000] [Microsoft][ThriftExtension] (14) Unexpected response from server during a HTTP connection: connect() failed: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond..Session Id: 2ece67bd-78ed-4f9e-ad67-f7c95fd1379a<BR />RequestId: 6a566442-3d6b-4b5c-8be9-c735022fbab8<BR />Cluster URI: <A href="https://api.powerbi.com" target="_blank" rel="noopener">https://api.powerbi.com</A><BR />Status code: 400<BR />Time: Tue Apr 28 2026 09:10:52 GMT+0000 (Coordinated Universal Time)</P><UL><LI>The error always references api.powerbi.com</LI><LI>No queries appear in Databricks SQL Warehouse query history</LI><LI>No useful logs are available on Databricks side</LI><LI>Gateway diagnostics show “Network alias interface: Ethernet” (default)</LI></UL></DIV> Tue, 28 Apr 2026 21:49:33 GMT https://community.databricks.com/t5/administration-architecture/vnet-data-gateway-unable-to-connect-to-azure-databricks/m-p/155744#M5200 LokeshChikuru 2026-04-28T21:49:33Z