[Rdiff-backup-bugs] [bug #26679] Backward compatibility

[anonymous]

URL:
  <http://savannah.nongnu.org/bugs/?26679>

                 Summary: Backward compatibility
                 Project: rdiff-backup
            Submitted by: None
            Submitted on: Tue 26 May 2009 06:06:23 AM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

I use Ubuntu 9.04 on the client and Ubuntu 8.10 on the server, but the
versions are not compatibles :

$ rdiff-backup test rom-eeebox::test
/var/lib/python-support/python2.6/rdiff_backup/SetConnections.py:148:
DeprecationWarning: os.popen2 is deprecated. Use the subprocess module.
  stdin, stdout = os.popen2(remote_cmd)
Warning: Local version 1.2.7 does not match remote version 1.1.16.
Exception '
Warning Security Violation!
Bad request for function: rpath.make_file_dict
with arguments: ['test']
' raised of class '<class 'rdiff_backup.Security.Violation'>':
  File "/var/lib/python-support/python2.6/rdiff_backup/Main.py", line 304, in
error_check_Main
    try: Main(arglist)
  File "/var/lib/python-support/python2.6/rdiff_backup/Main.py", line 321, in
Main
    rps = map(SetConnections.cmdpair2rp, cmdpairs)
  File "/var/lib/python-support/python2.6/rdiff_backup/SetConnections.py",
line 78, in cmdpair2rp
    return rpath.RPath(conn, filename).normalize()
  File "/var/lib/python-support/python2.6/rdiff_backup/rpath.py", line 884,
in __init__
    else: self.setdata()
  File "/var/lib/python-support/python2.6/rdiff_backup/rpath.py", line 908,
in setdata
    self.data = self.conn.rpath.make_file_dict(self.path)
  File "/var/lib/python-support/python2.6/rdiff_backup/connection.py", line
450, in __call__
    return apply(self.connection.reval, (self.name,) + args)
  File "/var/lib/python-support/python2.6/rdiff_backup/connection.py", line
370, in reval
    if isinstance(result, Exception): raise result

Traceback (most recent call last):
  File "/usr/bin/rdiff-backup", line 30, in <module>
    rdiff_backup.Main.error_check_Main(sys.argv[1:])
  File "/var/lib/python-support/python2.6/rdiff_backup/Main.py", line 304, in
error_check_Main
    try: Main(arglist)
  File "/var/lib/python-support/python2.6/rdiff_backup/Main.py", line 321, in
Main
    rps = map(SetConnections.cmdpair2rp, cmdpairs)
  File "/var/lib/python-support/python2.6/rdiff_backup/SetConnections.py",
line 78, in cmdpair2rp
    return rpath.RPath(conn, filename).normalize()
  File "/var/lib/python-support/python2.6/rdiff_backup/rpath.py", line 884,
in __init__
    else: self.setdata()
  File "/var/lib/python-support/python2.6/rdiff_backup/rpath.py", line 908,
in setdata
    self.data = self.conn.rpath.make_file_dict(self.path)
  File "/var/lib/python-support/python2.6/rdiff_backup/connection.py", line
450, in __call__
    return apply(self.connection.reval, (self.name,) + args)
  File "/var/lib/python-support/python2.6/rdiff_backup/connection.py", line
370, in reval
    if isinstance(result, Exception): raise result
rdiff_backup.Security.Violation:
Warning Security Violation!
Bad request for function: rpath.make_file_dict
with arguments: ['test']

Fatal Error: Lost connection to the remote system







Even if I understand the need of adding new features or modifying the
protocol, this non compatibility is not acceptable for me, especially with 2
versions separated by 6 months !

A backup manager must work with heterogeonous system, so a minor version of
the program should not break the compatibility.

To avoid the problem, the client and server should negociate the protocol
version, and the new versions should be able to switch to an older version of
the protocol automatically…

The client and the server




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