Comment # 7 on bug 1219370 from Giacomo Comes

The bug is back and this time I had the opportunity
to try several installation and I think I understood
what is going on.

The installation I did was with tumbleweed snapshot 20240208.
I have a local copy of it so I can do several installation
test without worrying about new packages being available
in tumbleweed.

During a installation, after the 'man' package is installed
the error messages
about '/var/cache/man/nnnnn not found' starts to appear
in /var/log/zypp/history.
Each error message is printed after the corresponding package
is installed.
The error is consistent with the fact that /var/cache/man
does not exist while the packages are installed,
because it gets created at the end of the installation
process when the transpost scriptlet of the package 'man'
get executed.

During the installation, while the error messages were
written in /var/log/zypp/history,
I decided to run:
/usr/bin/systemd-tmpfiles --create /usr/lib/tmpfiles.d/man-db.conf
and after that /var/cache/man was created and
in /var/log/zypp/history there were no more error messages.

It looks to me like the macro %transfiletriggerin
defined in the package 'man' is
executed not at the end of the transaction, but
at the end of each package installation,
like if it was a %filetriggerin macro.

If I have to guess, there is a bug in the code that
decides when to run the filetrigger macro.