2696907 - Best practices from SCC's perspective for addressing "503 Service Not Available" error when Cloud to On-Premise Connectivity fails

Symptom

***Note, that applying this KBA do not solve the issue, rather helps to investigate the root cause.***

Example scenario:

A destination is created in SAP WEB IDE that points to an on-premise Backend system. WEB IDE tries to call SAP UI5 ABAP Repository from the Backend via SAP Cloud Connector (SCC) and shows "No Applications to display" and "503 Service Not Available" messages.

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

Environment

SAP BTP Cloud To On-Premise scenario with SAP Cloud Connector involved

Product

SAP Connectivity service 2.0

Keywords

503 Service Not Available, SCC, SAP cloud connector, Virtual host, Internal host, Access allowed, Cloud connector, No Applications to display, web ide, SAP UI5 abap repository, SCP, BTP, Business Technology Platform , KBA , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , Bug Filed

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