I'm trying to track down why we seem to be getting empty backups on our
backuppc server.  What's weird is that we have no errors.  There doesn't
seem to be a debug setting for logs, and I think I've run out of things to
look at.

Some recent FULL backups have completed in around 10 seconds, which is
impossible.   We're using rsync over ssh, and have a small selection of
excluded directories in order to avoid some things that are either too big,
too volatile, or already have redundancies.

I can ssh from the backuppc server to the clients as the backuppc user
(although I haven't seen such errors, so no surprise that works).  I'm also
not getting the sort of errors I'd expect if sudo were broken, but just in
case I opened up the sudoers rule on a target server to allow rsync with
any arguments, but no change in behaviour.

Here are the config options I can find that look like they might be
relevant.  I've also included the current log for the client I've been
testing with, including a couple of attempted full backups.

What am I missing here?

$Conf{XferMethod} = 'rsync';
$Conf{RsyncClientPath} = 'sudo /usr/bin/rsync';
$Conf{RsyncBackupPCPath} = '/usr/libexec/backuppc-rsync/rsync_bpc';
$Conf{RsyncSshArgs} = [
  '-e',
  '$sshPath -l backuppc'
];
$Conf{RsyncShareName} = [
  '/'
];
$Conf{RsyncArgs} = [
  '--super',
  '--recursive',
  '--protect-args',
  '--numeric-ids',
  '--perms',
  '--owner',
  '--group',
  '-D',
  '--times',
  '--links',
  '--hard-links',
  '--delete',
  '--delete-excluded',
  '--one-file-system',
  '--partial',
  '--log-format=log: %o %i %B %8U,%8G %9l %f%L',
  '--stats'
];
$Conf{RsyncArgsExtra} = [];
$Conf{RsyncFullArgsExtra} = [
  '--checksum'
];
$Conf{RsyncIncrArgsExtra} = [];
$Conf{BackupFilesExclude} = {
  '*' => [
    '/bigfs*',
    '/data',
    '/dev',
    '/mnt',
    '/pool*',
    '/proc',
    '/run',
    '/sys',
    '/var/lib/postgresql',
    '/var/tmp'
  ]
};


2025-06-01 06:00:00 incr backup started for directory /
2025-06-01 06:00:13 incr backup 1895 complete, 3767 files, 195896461 bytes,
0 xferErrs (0 bad files, 0 bad shares, 0 other)
2025-06-01 06:00:13 Removing unfilled backup 1877
2025-06-01 06:00:13 BackupPC_backupDelete: removing #1877
2025-06-01 06:00:13 BackupPC_backupDelete: No prior backup for merge
2025-06-01 06:01:03 BackupPC_refCountUpdate: host host.example.com got 0
errors (took 50 secs)
2025-06-01 06:01:03 Finished BackupPC_backupDelete, status = 0 (running
time: 50 sec)
2025-06-02 06:00:01 incr backup started for directory /
2025-06-02 06:00:08 incr backup 1896 complete, 3767 files, 195896461 bytes,
0 xferErrs (0 bad files, 0 bad shares, 0 other)
2025-06-02 06:00:08 Removing unfilled backup 1878
2025-06-02 06:00:08 BackupPC_backupDelete: removing #1878
2025-06-02 06:00:08 BackupPC_backupDelete: No prior backup for merge
2025-06-02 06:00:57 BackupPC_refCountUpdate: host host.example.com got 0
errors (took 48 secs)
2025-06-02 06:00:57 Finished BackupPC_backupDelete, status = 0 (running
time: 49 sec)
2025-06-02 20:42:01 full backup started for directory /
2025-06-02 20:42:59 full backup 1897 complete, 3766 files, 144820510 bytes,
0 xferErrs (0 bad files, 0 bad shares, 0 other)
2025-06-02 20:42:59 Removing unfilled backup 1880
2025-06-02 20:42:59 BackupPC_backupDelete: removing #1880
2025-06-02 20:42:59 BackupPC_backupDelete: No prior backup for merge
2025-06-02 20:43:48 BackupPC_refCountUpdate: host host.example.com got 0
errors (took 49 secs)
2025-06-02 20:43:48 Finished BackupPC_backupDelete, status = 0 (running
time: 49 sec)
2025-06-02 21:04:47 full backup started for directory /
2025-06-02 21:04:50 full backup 1898 complete, 3766 files, 144820553 bytes,
0 xferErrs (0 bad files, 0 bad shares, 0 other)
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