I have two xrootd servers running, 4.9 on port 1094, 4.10 on port 1095

dcache   21624  0.0  0.0 481044  7404 ?        Sl   09:42   0:00 /usr/share/xrootd/v4.10.0/bin//xrootd -d:2 -l /usr/share/xrootd/v4.10.0/logs-1095/xrdlog -c /usr/share/xrootd/v4.10.0/etc/xrootd-1095.cf

dcache   25321  0.0  0.0 215812  6812 ?        Sl   10:19   0:00 /usr/share/xrootd/v4.9.0/bin//xrootd -d:2 -l /usr/share/xrootd/v4.9.0/logs-1094/xrdlog -c /usr/share/xrootd/v4.9.0/etc/xrootd-1094.cf

Both are configured with: 

                                          sec.level all pedantic

It would seem that the xrdcp 4.9.1 client is not honoring the signing requests issued by either:

[arossi@otfrid Desktop]$ xrdcp491 /etc/fstab root://fndcatemp2.fnal.gov:1094//data/xrootdfs/otfrid-`date | tr ' ' '.'`

[0B/0B][100%][==================================================][0B/s]  

Run: [FATAL] Hand shake failed

[arossi@otfrid Desktop]$ xrdcp491 /etc/fstab root://fndcatemp2.fnal.gov:1095//data/xrootdfs/otfrid-`date | tr ' ' '.'`

[0B/0B][100%][==================================================][0B/s]  

Run: [FATAL] Hand shake failed

In the debug output for both of these, one finds:

[2019-08-21 10:37:58.006691 -0500][Debug  ][XRootDTransport   ] [fndcatemp2.fnal.gov:1094 #0.0] Sending out kXR_login request, username: arossi, cgi: ?xrd.cc=us&xrd.tz=-6&xrd.appname=xrdcp&xrd.info=&xrd.hostname=otfrid.fnal.gov&xrd.rn=v4.9.1, dual-stack: true, private IPv4: false, private IPv6: false

[2019-08-21 10:37:58.006769 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Wrote a message:  (0x2c044d10), 115 bytes

[2019-08-21 10:37:58.007157 -0500][Dump   ][XRootDTransport   ] [msg: 0x2c046610] Expecting 61 bytes of message body

[2019-08-21 10:37:58.007180 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Received message header, size: 8

[2019-08-21 10:37:58.007199 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Received a message of 69 bytes

[2019-08-21 10:37:58.007220 -0500][Debug  ][XRootDTransport   ] [fndcatemp2.fnal.gov:1094 #0.0] Logged in, session: 0d000000e9620000170000000d000000

[2019-08-21 10:37:58.007236 -0500][Debug  ][XRootDTransport   ] [fndcatemp2.fnal.gov:1094 #0.0] Authentication is required: &P=gsi,v:10400,c:ssl,ca:ba240aa8.0|f5f0dfc2.0

[2019-08-21 10:37:58.007259 -0500][Debug  ][XRootDTransport   ] [fndcatemp2.fnal.gov:1094 #0.0] Sending authentication data

[2019-08-21 10:37:58.007292 -0500][Debug  ][XRootDTransport   ] [fndcatemp2.fnal.gov:1094 #0.0] Trying to authenticate using gsi

[2019-08-21 10:37:58.062219 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Wrote a message:  (0x2c04d0e0), 136 bytes

[2019-08-21 10:37:58.087367 -0500][Dump   ][XRootDTransport   ] [msg: 0x2c04d0e0] Expecting 2862 bytes of message body

[2019-08-21 10:37:58.087404 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Received message header, size: 8

[2019-08-21 10:37:58.087423 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Received a message of 2870 bytes

[2019-08-21 10:37:58.087448 -0500][Debug  ][XRootDTransport   ] [fndcatemp2.fnal.gov:1094 #0.0] Sending more authentication data for gsi

[2019-08-21 10:37:58.090665 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Wrote a message:  (0x2c04d190), 3705 bytes

[2019-08-21 10:37:58.092122 -0500][Dump   ][XRootDTransport   ] [msg: 0x2c04d190] Expecting 0 bytes of message body

[2019-08-21 10:37:58.092167 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Received message header, size: 8

[2019-08-21 10:37:58.092189 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Received a message of 8 bytes

[2019-08-21 10:37:58.092215 -0500][Debug  ][XRootDTransport   ] [fndcatemp2.fnal.gov:1094 #0.0] XrdSecProtect loaded.

[2019-08-21 10:37:58.092247 -0500][Debug  ][XRootDTransport   ] [fndcatemp2.fnal.gov:1094 #0.0] Authenticated with gsi.

[2019-08-21 10:37:58.092275 -0500][Debug  ][XRootDTransport   ] [fndcatemp2.fnal.gov:1094 #0.0] Sending out kXR_endsess for session: 0c000000e9620000180000000c000000

[2019-08-21 10:37:58.092329 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Wrote a message:  (0x2c046610), 24 bytes

[2019-08-21 10:37:58.092751 -0500][Dump   ][XRootDTransport   ] [msg: 0x2c046610] Expecting 23 bytes of message body

[2019-08-21 10:37:58.092820 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Received message header, size: 8

[2019-08-21 10:37:58.092849 -0500][Dump   ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Received a message of 31 bytes

[2019-08-21 10:37:58.092909 -0500][Error  ][AsyncSock         ] [fndcatemp2.fnal.gov:1094 #0.0] Socket error while handshaking: [FATAL] Hand shake failed

Is this a known issue?  I checked the Release notes and the GitHub Issues but cannot find anything that looks like a fix for or an observation of this.

Of course, 4.10 clients work against both servers:

[arossi@otfrid Desktop]$ xrdcp410 /etc/fstab root://fndcatemp2.fnal.gov:1094//data/xrootdfs/otfrid-`date | tr ' ' '.'`

[574B/574B][100%][==================================================][574B/s]  

[arossi@otfrid Desktop]$ xrdcp410 /etc/fstab root://fndcatemp2.fnal.gov:1095//data/xrootdfs/otfrid-`date | tr ' ' '.'`

[574B/574B][100%][==================================================][574B/s]  

Should I open an issue?

Thanks, Al