3631005 - PI/PO interface error: Proxy responded: HTTP/1.0 502 Bad Gateway

• In Process Integration (PI) or Process Orchestration (PO) a HTTP Proxy has not been configured.
• However, logs, traces and errors during message processing all indicate that a HTTP Proxy has been configured.
• A SOAP Adapter interface fails with errors similar to below: 
• Error during ping operation: Error while silently connecting: org.w3c.www.protocol.http.HttpException: Proxy responded: HTTP/1.0 502 Bad Gateway
  Unable to call the caller service : 
  [EXCEPTION]
  Failed to call the endpoint: null; nested exception caused by: 
  java.io.IOException: Error receiving or parsing request message: java.lang.RuntimeException: Error while silently connecting: org.w3c.www.protocol.http.HttpException: Proxy responded: HTTP/1.0 502 Bad Gateway
      at com.sap.aii.adapter.soap.ejb.XIHttpDestinationCallerService.callHttpPost(XIHttpDestinationCallerService.java:132)
      at com.sap.aii.adapter.soap.ejb.XIHttpDestinationCallerService.call(XIHttpDestinationCallerService.java:31)
      at com.sap.aii.af.sdk.xi.srt.TransportBubble.onMessage(TransportBubble.java:67)
      at com.sap.aii.af.sdk.xi.srt.ExtensionBubble.onMessage(ExtensionBubble.java:21)
      at com.sap.aii.adapter.soap.ejb.XISOAPAdapterBean.callBubbleSequenceRec
• Collect and Send Data failed: Data transfer failed. Unable to open connection to proxy "host:port". Opening proxy tunnel [failed][HTTP/1.0 502 Bad Gateway].

SAP NetWeaver 7.5

https.proxyHost, HTTP destination, SOAP Adapter, proxies, connection, failure, redirect, JVM, runtime environment , KBA , BC-JAS-SEC , Security, User Management , BC-XI-CON-AFW , J2EE Adapter Framework , BC-XI-CON-SOP , SOAP Adapter , BC-XI-IBC-MAP , Mapping , BC-XI-CON-RST , Rest Adapter , Problem