HTTH-801 — Http-proxy cannot communicate with ftp-proxy
FTP URIs are handled by http-proxy in cooperation with ftp-proxy. The request is passed to ftp-proxy which performs FTP communication and returns the result back to http-proxy. The proxies communicate via an internal protocol called HTFTP. This message indicates that http-proxy has sent a request to ftp-proxy, but has received FTP and not HTFTP response. Probably, HTFTP-MODE is not configured properly in ftp-proxy.