Solution : https://service.sap.com/sap/support/notes/1027676 (SAP Service marketplace login required)
Key words :
web dynpro abap / sap enterprise portal sap web dispatcher, apache proxy sap web dispatcher, sap web dispatcher reason, parameter wdisp/http/esid_support=1, http return code, external session id, encoded form %2f, apache proxy, apache rejects, apache configuration
Related Notes :
866603 | ESID support in SAP Web Dispatcher |