Solution : https://service.sap.com/sap/support/notes/657765 (SAP Service marketplace login required)
Key words :
text format httptrace=textheaders - logs, text format httptrace=hexfull - logs, hex format httptrace=hexheaders - logs, http trace properties configuration, info aboutthe requests received, request/response handling problem, httptrace=textfull - logs, solution http trace, httptrace=textfullhttptracerequestoutput=request, http communication reason
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