3235039 - HTTP Connection broken and HTTP_1_1_REQUIRED

You are getting Status HTTP Response 500 – Connection Broken during RFC Connection.

On dev_icm logs, there is the following entries:

(...)

[Thr <thread_number>] Error Code: 13 (HTTP_1_1_REQUIRED)

(...)

[Thr <thread_number>]   HTTP/1.0 500 Connection broken  

(...)

SAP Netweaver all versions

HTTP 500 Connection Broken, HTTP_1_1_REQUIRED, Error Code 13, HTTP/2 , KBA , BC-CST-IC , Internet Communication Manager , Problem