> @ccaffy Are you doing a Third Party Copy (via HTTP) for the test transfer? That's the particular scenario that breaks it for me. Yes, indeed. A HTTP-TPC PULL transfer. The modification I made is simple: I ask the pulling server to ask the source server's file size via a HEAD request before opening the file on the pulling server. Do you have a link to your tests and some logs associated to them ? Thanks -- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1736#issuecomment-1308339922 You are receiving this because you commented. Message ID: <[log in to unmask]> ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1