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3334829 - BTP application connection to data source fails with error: 104 - Connection reset by peer


Trying to setup the BAS (Business Application Studio) to connect to a backend and the connection in SAP Cloud Connector shows as available, in destination the check connection is successful.


However in BAS selecting the data source results the error:
All catalog service requests failed for system: XYZ

  • The terminal test for the curl command shows return code 200 
    > CONNECT <host>:<port> HTTP/1.1
    > Host: <host>:<port> 
    > User-Agent: curl/7.74.0
    > Proxy-Connection: Keep-Alive

    < HTTP/1.0 200 OK

  • SAP Cloud Connector ljs trace the following entry appears:
    2023-05-13 03:09:33,155          #Successfully connected channel: [id: ...  -]. Starting handshake with server.
    2023-05-13 03:09:33,156          #Sending handshake request for tunnel: account:///<subaccount ID>/... and host
    2023-05-13 03:09:33,157          #Handshake failed! Closing the channel [id: ... -] immediately. error 104 - Connection reset by peer



  • Business Application Studio
  • SAP Business Technology Platform


SAP Business Technology Platform all versions


s4hana s/4hana hana s4 R/3 abap ip ips host firewall network template fiori range address conencted connectivity btp sap cp scp webide web ide cf cloud foundry Odata, V2, V4, , Gateway, OData Version(s)

, KBA , BC-CP-DEST-CF , Destination service for Cloud Foundry environment , CA-BAS-AUT , OBSOLETE Component: Please use CA-BAS-CNSM , Problem

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