why yum could not find the python-pip packages on some PCs

Question

I got a very strange problem and cannot figure out why.

When I run yum info python-pip command on some CentOS 7 machines, it returns Error: No matching Packages to list. But, I used to install python-pip on without problem until now.

epel repository is enabled:

epel/x86_64                  Extra Packages for Enterprise Linux 7 - x86_64      11,016

Strangely, the same command can run successfully on other CentOS 7 servers and returns the information of the package.

CentOS release: CentOS Linux release 7.2.1511 (Core)
epel-release: 7.6 or 7.8 (I tried both.)

Please someone could explain what is wrong the EPEL repository.

EDIT: The yum command output;

[root@local ~]# yum info python-pip  
Loaded plugins: fastestmirror, langpacks  
Loading mirror speeds from cached hostfile  
 * epel: fedora.mirror.serversaustralia.com.au  
 * rpmforge: mirror.ventraip.net.au  
Error: No matching Packages to list

EDIT2: It may be just because of the package has been pulled out from the repository. But I still don't understand why some servers are able to see and download the package but others not.
I have run through the commands below on both servers and the check-update shows that the epel repository is from fedora.uberglobalmirror.com, which is same on both servers.

yum clean all
yum check-update
yum info python-pip`

Solution

Hmm. A careful examination of my EPEL mirror shows that the package is now named python2-pip beginning with EPEL 7.

/srv/www/mirrors/epel/7/x86_64/p/python2-pip-8.1.2-5.el7.noarch.rpm

I would suggest that you try installing that.

Comments

[Roger]

thanks Michael, the python2-pip seems doing the job. I just don't understand why some servers can see the package but others not. I was wondering I might miss something.

[Roger]

It looks like the package has been pulled out. but why some servers can still see it or able to install it? I have done "yum clean all" to clean all the caches.

[Aaron Copley]

Huh.. Good find. I didn't notice that. I definitely have a python-pip in my local mirror that keeps old copies. It's in Koji as python-pip, too.

[Aaron Copley]

Best guess is not all mirrors are configured the same way and caching.

[Michael Hampton]

@AaronCopley I don't have space to keep old copies on my mirror, but I don't doubt it. Renaming all the python- packages to python2- has been in progress for quite a while now, as Python 3 will finally become the default Python in RHEL 8. But since EPEL packages are often maintained in sync with corresponding Fedora packages, most of which have already been renamed...