Thanks Anssi,

It seems the problem persists, it is annoying and causing expected problem with automation while yum always got such problem. This mirror seems has limited the HTTP request and return error 503, could you remove this mirror in order to maintain a error free mirror environment?

Total download size: 193 M
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
acl-2.2.51-14.el7.x86_64.rpm   FAILED                                         
http://repo.virtualhosting.hk/centos/7/os/x86_64/Packages/acl-2.2.51-14.el7.x86_64.rpm: [Errno 14] HTTP Error 503 - Service Unavailable         0% [                                                                                                                                     ]  0.0 B/s |    0 B  --:--:-- ETA
Trying other mirror.
apr-1.4.8-3.el7_4.1.x86_64.rpm FAILED                                         
http://repo.virtualhosting.hk/centos/7/os/x86_64/Packages/apr-1.4.8-3.el7_4.1.x86_64.rpm: [Errno 14] HTTP Error 503 - Service Unavailable       0% [                                                                                                                                     ]  0.0 B/s |    0 B  --:--:-- ETA
Trying other mirror.
(1/304): GeoIP-1.5.0-13.el7.x86_64.rpm                                                                                                                                                                                                                                                              | 1.5 MB  00:00:00    
(2/304): apr-devel-1.4.8-3.el7_4.1.x86_64.rpm                                                                                                                                                                                                                                                       | 188 kB  00:00:00    
(3/304): attr-2.4.46-13.el7.x86_64.rpm                                                                                                                                                                                                                                                              |  66 kB  00:00:00    
(4/304): audit-libs-2.8.4-4.el7.x86_64.rpm                              

> Nethub Online - Ming kirjoitti 25.2.2019 klo 9.05:
> > However, if I try to manually update the failed package (e.g. bind-libs
> > like above) by "yum -y update bind-libs" , it will be success. It means
> > the package exists in mirror server repo.virtualhosting, however somehow
> > the server limits the HTTP request and return error 503, can CentOS
> > mirror admin inform this mirror admin to fix the problem?
>
> I have sent a message to that mirror's contact email address. Maybe they
> can reply here.