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Description of problem:

This is similar to RHEL-6 bug
Bug 690904 - RFE: graceful handling of error handling for non-privileged user
addressed in RHEL-6.4

On RHEL-7 it seems that errors regressed to something not very user friendly.

Compare following snippets from yum-3.2.29-40.el6 and yum-3.4.3-116.el7.

========================
Loaded plugins: auto-update-debuginfo, product-id, refresh-packagekit, security,
              : subscription-manager
No plugin match for: rhnplugin
https://auto-i386-001.ss.eng.bos.redhat.com/bz690904repoU/repodata/repomd.xml: [Errno 14] PYCURL ERROR 77 - "Problem with the SSL CA cert (path? access rights?)"
Trying other mirror.

vs

Loaded plugins: product-id, subscription-manager
https://pes-guest-104.lab.eng.brq.redhat.com/bz690904repoU/repodata/repomd.xml: [Errno 14] curl#77 - "<Unknown>"
Trying other mirror.

=======================
Loaded plugins: auto-update-debuginfo, product-id, refresh-packagekit, security,
              : subscription-manager
No plugin match for: rhnplugin
https://auto-i386-001.ss.eng.bos.redhat.com/bz690904repoU/repodata/repomd.xml: [Errno 14] problem with the local client certificate
Trying other mirror.

vs

Loaded plugins: product-id, subscription-manager
https://pes-guest-104.lab.eng.brq.redhat.com/bz690904repoU/repodata/repomd.xml: [Errno 14] curl#58 - "unable to load client cert: -8018 (SEC_ERROR_UNKNOWN_PKCS11_ERROR)"
Trying other mirror.

Upstream fix http://yum.baseurl.org/gitweb?p=urlgrabber.git;a=commitdiff;h=e19463a8781fa5de74e62a09684259309b2f89cf

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-0447.html