SAP Knowledge Base Article - Preview

2823521 - How to deal with the exception "Unable to open connection to backend system" during the Inbound Replication to SAP CX Commerce


  • During the Inbound Replication from a backend system to SAP CX Commerce via SCPI, the following exception appears in the SCPI Monitoring Payload logs (Monitor Message Processing-> Message Processing Log Attachments)

        Unable to open connection to backend system.


  •  Following exception is shown as well in the main iflow executed, however the root cause is mostly related with a connection issue.

Inbound processing in endpoint at ENDPOINTNAME failed with message "Fault:Sequential processing failed for number 0. Exchange[ID-vsa6770959-36876-1564197588059-25-109]. Caused by: [org.apache.camel.CamelExchangeException - Sequential processing failed for number 0. Exchange[ID-vsa6770959-36876-1564197588059-25-114]. Caused by: [org.apache.camel.CamelExchangeException - Sequential processing failed for number 0. Exchange[ID-vsa6770959-36876-1564197588059-25-117]. Caused by: [ - Bad Gateway : 502 : HTTP/1.1 ]]]", caused by "OsciException:Bad Gateway : 502 : HTTP/1.1




  • SAP CX Commerce 1905
  • SAP Cloud Platform Integration (SCPI)
  • SAP S4HANA Cloud ( as a backend system)


  • connection
  • unable
  • backend system
  • Fault
  • Sequential
  • Bad Gateway
  • OsciException:Bad Gateway
  • OsciException:Bad Gateway : 502
  • OsciException:Bad Gateway : 502 : HTTP/1.1
, KBA , CEC-COM-ODS , O-Data Services, Integration to SCPI , How To

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