Spacewalk repodata/repomd.xml [Errno 14] HTTP Error 404 - Not Found

I Configured spacwalk 2.7 and synchronized the channels as the root FS was and the server was unresponsive through gui i deleted the cache in /var/cache/rhn & /var/cache/yum and ran yum clean all on the server as well as spacewalk client i could see the following error

Loaded plugins: rhnplugin
This system is receiving updates from Spacewalk server.


 One of the configured repositories failed (Unknown),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=<repoid> ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>
        or
            subscription-manager repos --disable=<repoid>

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

failed to retrieve repodata/repomd.xml from oraclelinux7-x86_64
error was [Errno 14] HTTP Error 404 - Not Found

Now i have the server which holds the cache and works when i try to install using yum i have to compare the metadata how can that be done