Comment 8 for bug 364531

This also happens when using ldap backend. I'm suspecting that the slapd.preinst is the culprit to this bug:

dump_databases() { # {{{
# If the user wants us to dump the databases they are dumped to the
# configured directory.

        local db suffix file dir failed slapcat_opts

        database_dumping_enabled || return 0

        dir=`database_dumping_destdir`
        echo >&2 " Dumping to $dir: "
        for suffix in `get_suffix`; do
                file="$dir/$suffix.ldif"
                echo -n " - directory $suffix... " >&2
                # Need to support slapd.d migration from preinst
                if [ -f "${SLAPD_CONF}" ]; then
                        slapcat_opts="-f ${SLAPD_CONF}"
                else
                        slapcat_opts="-F ${SLAPD_CONF}"
                fi
                slapcat ${slapcat_opts} -b "$suffix" > "$file" || failed=1
                if [ "$failed" ]; then
                        rm -f "$file"
                        echo failed. >&2
                        exit 1
                fi
                echo "done." >&2
        done
}