Issue

• After registering system with RHN Classic, yum commands return the following error:

    # yum install yum-downloadonly
    Loading "security" plugin
    Loading "rhnplugin" plugin
    There was an error communicating with RHN.
    RHN support will be disabled.
    Error communicating with server. The message was:
    Temporary failure in name resolution
    Existing lock /var/run/yum.pid: another copy is running as pid 7604.
    Another app is currently holding the yum lock; waiting for it to exit...
    Another app is currently holding the yum lock; waiting for it to exit...
    Another app is currently holding the yum lock; waiting for it to exit...
    Another app is currently holding the yum lock; waiting for it to exit...
    Another app is currently holding the yum lock; waiting for it to exit...
    Another app is currently holding the yum lock; waiting for it to exit...
    Another app is currently holding the yum lock; waiting for it to exit...
    Another app is currently holding the yum lock; waiting for it to exit...
    Another app is currently holding the yum lock; waiting for it to exit...
    Another app is currently holding the yum lock; waiting for it to exit...
    ......