2699422 - message is with empty payload after the processing of HTTP_AAE sender channel

Message is with empty payload after the processing of sender HTTP_AAE sender channel.
Then the message processing failed in the mapping step because the payload is empty.
Mostly this issue happens after migrating the old Plain HTTP Adapter to HTTP_AAE Adapter.

• SAP NetWeaver
• SAP Process Integration

Mapping, HTTP_AAE, sender channel, empty, payload, message monitor, message processing log, content-type, application/x-www-form-urlencoded, application/xml, text/xml, HTTP request, Process Orchestration 7.5, PI 7.5, PO 7.5, XI, AEX. , KBA , BC-XI-CON-HTP , HTTP Adapter J2EE Adapter Engine , Problem