Description of problem:

The following used to work in RHEL 5.6 and below:

[root@host-2 ~]# /usr/bin/rsync --archive --one-file-system --numeric-ids --delete --quiet LOCALDIR host-1:REMOTEDIR
[root@host-2 ~]#

However, after updating to RHEL 5.7, the commandline above no longer works.


How reproducible:

Always.

  
Actual results:

Results after updating to RHEL 5.7:

[root@host-2 ~]# /usr/bin/rsync --archive --one-file-system --numeric-ids --delete --quiet LOCALDIR host-1:REMOTEDIR
usage: ssh [-1246AaCfgkMNnqsTtVvXxY] [-b bind_address] [-c cipher_spec]
           [-D [bind_address:]port] [-e escape_char] [-F configfile]
           [-i identity_file] [-L [bind_address:]port:host:hostport]
           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
           [-R [bind_address:]port:host:hostport] [-S ctl_path]
           [-w tunnel:tunnel] [user@]hostname [command]
rsync: connection unexpectedly closed (0 bytes received so far) [sender] rsync error: unexplained error (code 255) at io.c(600) [sender=3.0.6]
[root@host-2 ~]#


Expected results:

[root@host-2 ~]# /usr/bin/rsync --archive --one-file-system --numeric-ids --delete --quiet LOCALDIR host-1:REMOTEDIR
[root@host-2 ~]#


Additional info:

If I add the username option, and specify root@ before the hostname, it works:

[root@host-2 ~]# /usr/bin/rsync --archive --one-file-system --numeric-ids --delete --quiet LOCALDIR root@host-1:REMOTEDIR
[root@host-2 ~]#

However, "man rsync" still claims the username option should be optional:

"Access via remote shell:
   Pull: rsync [OPTION...] [USER@]HOST:SRC... [DEST]
   Push: rsync [OPTION...] SRC... [USER@]HOST:DEST"

...but it seems now it isn't.