fuel7.0 Using the command “fuel-createmirror -u“ parsing always rely on failure, not synchronous ubuntu mirror to the local, who can help me?What is why?

[root@fuel fuel-createmirror]# fuel-createmirror -U
 * INFO: Verifying connection to the Fuel backend
 * INFO: Fuel backend connection OK
 * INFO: Started /opt/fuel-createmirror-7.0/deb-mirror /opt/fuel-createmirror-7.0/config/ubuntu.cfg
 * INFO: Upstream mirror archive.ubuntu.com supports rsync protocol
 * INFO: Fetching dist 'trusty' lists
 * INFO: Fetching component 'main' binary package lists
 * INFO: Fetching component 'multiverse' binary package lists
 * INFO: Fetching component 'universe' binary package lists
 * INFO: Fetching component 'main/debian-installer' binary package lists
 * INFO: Fetching component 'multiverse/debian-installer' binary package lists
 * INFO: Fetching component 'universe/debian-installer' binary package lists
 * INFO: Fetching section 'main' i18n
 * INFO: Fetching section 'multiverse' i18n
 * INFO: Fetching section 'universe' i18n
 * INFO: Fetching dist 'trusty-updates' lists
 * INFO: InRelease file will expire before the next update, removing it...
 * ERROR: Not found debian-installer at 'universe/debian-installer'
 * INFO: Fetching component 'main' binary package lists
 * INFO: Fetching component 'multiverse' binary package lists
 * INFO: Fetching component 'universe' binary package lists
 * INFO: Fetching component 'main/debian-installer' binary package lists
 * INFO: Fetching component 'multiverse/debian-installer' binary package lists
 * INFO: Fetching section 'main' i18n
 * INFO: Fetching section 'multiverse' i18n
 * INFO: Fetching section 'universe' i18n
 * INFO: Fetching dist 'trusty-security' lists
 * INFO: InRelease file will expire before the next update, removing it...
 * INFO: Fetching component 'main' binary package lists
 * INFO: Fetching component 'multiverse' binary package lists
 * INFO: Fetching component 'universe' binary package lists
 * INFO: Fetching component 'main/debian-installer' binary package lists
 * INFO: Fetching component 'multiverse/debian-installer' binary package lists
 * INFO: Fetching component 'universe/debian-installer' binary package lists
 * INFO: Fetching section 'main' i18n
 * INFO: Fetching section 'multiverse' i18n
 * INFO: Fetching section 'universe' i18n
 * INFO: Fetching indices
 * INFO: Parsing package and sources files:
 * INFO: /var/www/nailgun/ubuntu-full/dists/trusty/main/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty/multiverse/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty/universe/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty/main/debian-installer/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty/multiverse/debian-installer/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty/universe/debian-installer/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-updates/main/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-updates/multiverse/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-updates/universe/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-updates/main/debian-installer/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-updates/multiverse/debian-installer/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-security/main/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-security/multiverse/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-security/universe/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-security/main/debian-installer/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-security/multiverse/debian-installer/binary-amd64/Packages.gz /var/www/nailgun/ubuntu-full/dists/trusty-security/universe/debian-installer/binary-amd64/Packages.gz
 * INFO:
 * INFO: Resolving dependencies for partial mirror
 * FATAL: Cannot calculate list of dependencies
 * FATAL: Creation of Ubuntu mirror FAILED, check logs at /var/log/mirror-sync
[root@fuel fuel-createmirror]# fuel-createmirror -U