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2498531 - Load balanced HTTPS proxy server for SAP Cloud Connector

Symptom

  • You have completed the initial configuration for Cloud Connector and already configured HTTPS Proxy to connect to SAP Cloud Platform. However, your proxy server is load balanced which will connect to/between two or more different IP addresses.
  • You are facing the error where an application running on SAP Cloud Platform loses connection to the Cloud Connector every now and then.
  • From the Cloud Connector traces, there is a dropout from the Cloud Connector to SAP Cloud Platform. Here is an example (establishing a tunnel to two different IP addresses):
    -----------------------------------
    <Timestamp>#INFO#com.sap.core.connectivity.tunnel.client.notification.NotificationClient#notificationclient-3-2#          #Successfully established tunnel to notification service: [id: 0xcXXXaaab, L:/<Cloud Platform host>:<port> - R:<proxy server host>/<load balanced IP1:<port>]|
    .............
    #INFO#com.sap.core.connectivity.tunnel.core.impl.context.TunnelRegistryImpl#notificationclient-3-2#      #Unregistered tunnel channel [id: 0xcXXXaaab, L:/<Cloud Platform host>:<port> ! R:<proxy server host>/<load balanced IP1:<port>] for tunnel id "account:///<account id>"|
    #INFO#com.sap.core.connectivity.tunnel.core.impl.context.TunnelRegistryImpl#notificationclient-3-2#      #Close tunnel with id "account:///<account id>" and client id "<client id>"|
    #INFO#com.sap.core.connectivity.tunnel.client.reconnect.ReconnectScheduler#notificationclient-3-2#       #Reconnect attempt \#1 to connectivitynotification.ap1.hana.ondemand.com/<client host>:443 - sleeping for 21 seconds|
    #INFO#com.sap.core.connectivity.tunnel.client.handshake.ClientProtocolHandshaker#notificationclient-3-1#  #Sending handshake request for tunnel: account:///<account id> and host connectivitynotification.ap1.hana.ondemand.com|
    #INFO#com.sap.core.connectivity.tunnel.core.impl.context.TunnelRegistryImpl#notificationclient-3-1#          #Registered tunnel channel [id: 0x8XXXe3cd, L:/<Cloud Platform host>:<port> - R:<proxy server host>/<load balanced IP2:<port>] for tunnel id "account:///<account id>" and client id"69294A805F8D11E6B7EFD4650AAAAAAA"|
    #INFO#com.sap.core.connectivity.tunnel.client.notification.NotificationClient#notificationclient-3-1#          #Successfully established tunnel to notification service: [id: 0x8XXXe3cd, L:/<Cloud Platform host>:<port> - R:<proxy server host>/<load balanced IP2:<port>]|
    -----------------------------------


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Environment

  • SAP Cloud Connector
  • SAP Cloud Platform

Product

SAP Business Technology Platform all versions ; SAP Connectivity service 2.0

Keywords

Cloud Connector, SAP Cloud Platform, SCC, SCP, HTTPS proxy, proxy server, tunnel, connection dropout, connection reconnect, load balanced , KBA , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , Problem

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