2670170 - Backend Not Reachable on Cloud Connector via RFC - connection pending after 60000ms

Symptom

Adding an ABAP system with RFC connection to Cloud Connector mappings, and when testing this connection it results in "Not Reachable".
SCC trace (ljs_trace.log/scc_core.trc) brings following error:

#INFO#com.sap.scc.rt#Thread-39# #SccEndpointValidator connection to RFC://<host>:sapgwXX as direct abap application server failed: com.sap.scc.jni.CpicCommunicationException:
LOCATION CPIC (TCP/IP) on local host
ERROR partner '<host>:sapgwXX' not reached
...
DETAIL NiBufIConnect: connection pending after 60000ms

Environment

SAP Cloud Connector release independent;
SAP AS ABAP back-end system.

Product

SAP Connectivity service 2.0

Keywords

SCC, SAP Cloud Connector, Connectivity, ABAP, backend, protocol, RFC, Not Reachable, Gateway, firewall, local host, LOCATION CPIC (TCP/IP) on local host, NiBufIConnect, connection pending, timeout, sap gateway, grwd, gateway, sapgw, 33, GW, gwmon, , KBA , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , BC-CST-GW , Gateway/CPIC , Problem

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