[Users] Cannot download some noarch when exec 'yum install ovirt-engine'

[陈良]

Hi, Everyone
When I exec 'yum install ovirt-engine',there are some problems ,as below:
 
Error Downloading Packages:
  ovirt-log-collector-3.2.2-1.fc18.noarch: [Errno 256] No more mirrors to try.
  ovirt-log-collector-3.2.2-1.fc18.noarch: Downloaded package ovirt-log-collector-3.2.2-1.fc18.noarch, from ovirt-stable, but it was invalid.
  ovirt-host-deploy-1.0.2-1.fc18.noarch: [Errno 256] No more mirrors to try.
  ovirt-host-deploy-1.0.2-1.fc18.noarch: Downloaded package ovirt-host-deploy-1.0.2-1.fc18.noarch, from ovirt-stable, but it was invalid.
  ovirt-image-uploader-3.2.2-1.fc18.noarch: Downloaded package ovirt-image-uploader-3.2.2-1.fc18.noarch, from ovirt-stable, but it was invalid.
  ovirt-image-uploader-3.2.2-1.fc18.noarch: [Errno 256] No more mirrors to try.
  ovirt-host-deploy-java-1.0.2-1.fc18.noarch: [Errno 256] No more mirrors to try.
  ovirt-host-deploy-java-1.0.2-1.fc18.noarch: Downloaded package ovirt-host-deploy-java-1.0.2-1.fc18.noarch, from ovirt-stable, but it was invalid.
  ovirt-iso-uploader-3.2.2-1.fc18.noarch: [Errno 256] No more mirrors to try.
  ovirt-iso-uploader-3.2.2-1.fc18.noarch: Downloaded package ovirt-iso-uploader-3.2.2-1.fc18.noarch, from ovirt-stable, but it was invalid.

 
my host is fedora 18
Thanks
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