SAP Knowledge Base Article - Preview

3744571 - 503 Service Unavailable on Web Dispatcher Post-OS Patching

Symptom

  • After an OS patch (e.g., SLES 15 SP4) and VM reboot of the SAP Web Dispatcher, the Fiori Launchpad returns an HTTP 1.1 / 503 Service Unavailable error.
  • Accessing the application via port 44303 is blocked or unresponsive


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Environment

S/4HANA Private Cloud

Product

SAP S/4HANA Cloud Private Edition 2023

Keywords

SAP Web Dispatcher, Fiori Launchpad 503 Error, Port 44303 Blocked, SLES 15 SP4 OS Patching, HTTP/1.1 Service Unavailable, ICM Service Activation, sapwebdisp, HEC44V107299, ECS Delivery  , KBA , BC-CST-WDP , Web Dispatcher , CA-FLP-FE-AI , Application iframe communication in FLP and Work Zone , Problem

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