Bug#1022162: ftpsync: Sync big repositories sometimes (often?) fail with rsync(1) error due to --max-delete limit

[WHR]

Package: ftpsync
Version: 20180513
Severity: normal

The rsync(1) log file under /var/log/ftpsync/ shows something like:

Deletions stopped due to --max-delete limit (168906 skipped)
...
rsync error: the --max-delete limit stopped deletions (code 25) at main.c(1677) [generator=3.1.3]

-- System Information:
Debian Release: 10.10
APT prefers oldstable-updates
APT policy: (500, 'oldstable-updates'), (500, 'oldstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-17-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_SOFTLOCKUP
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages ftpsync depends on:
ii postfix [mail-transport-agent] 3.4.14-0+deb10u1
ii rsync 3.1.3-6

Versions of packages ftpsync recommends:
ii curl 7.64.0-4+deb10u2

ftpsync suggests no packages.

-- no debconf information