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3519529 - error NIEHOST_UNKNOWN in SAP Web Dispatcher or ICM trace file

Symptom

In WDP trace file dev_webdisp or ICM trace file, the error NIEHOST_UNKNOWN reported
Connection request to abap.exemple.com:<port> failed (NIEHOST_UNKNOWN)

Another symptom is observed when performing a "connection test" on an HTTP destination via transaction SM59, a popup with the following message appears:
Direct connect to abap.exemple.com failed: NIEHOST_UNKNOWN


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Environment

  • SAP Netwaver based product
  • ABAP Platform based product
  • SAP Web Dispatcher

Product

SAP S/4HANA 2020

Keywords

NIEHOST_UNKNOWN, is/hostbuffer_timeout_invalid_entry , KBA , BC-CST-WDP , Web Dispatcher , Problem

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