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Description of problem: When yum is asked to install something by a virtual provide or a file, and so yum wants to pick from possible alternatives, but non of the alternatives is install-able due to conflicts, a traceback is printed. In my reproducer below, I think the problematic case is that mariadb-connector-c requires /etc/my.cnf but the only package that provides it is mysql-libs, that conflicts with mariadb-connector-c. Version-Release number of selected component (if applicable): yum-3.4.3-161.el7.noarch How reproducible: easy Steps to Reproduce: 1. yum -y remove mysql-libs 2. yum install https://hhorak.fedorapeople.org/mariadb-connector-c-3.0.5-2.el7.x86_64.rpm 3. Actual results: Loaded plugins: product-id, search-disabled-repos, subscription-manager This system is not registered with an entitlement server. You can use subscription-manager to register. mariadb-connector-c-3.0.5-2.el7.x86_64.rpm | 139 kB 00:00:00 Examining /var/tmp/yum-root-vh8qqq/mariadb-connector-c-3.0.5-2.el7.x86_64.rpm: mariadb-connector-c-3.0.5-2.el7.x86_64 Marking /var/tmp/yum-root-vh8qqq/mariadb-connector-c-3.0.5-2.el7.x86_64.rpm to be installed Resolving Dependencies --> Running transaction check ---> Package mariadb-connector-c.x86_64 0:3.0.5-2.el7 will be installed --> Processing Dependency: /etc/my.cnf for package: mariadb-connector-c-3.0.5-2.el7.x86_64 Traceback (most recent call last): File "/usr/bin/yum", line 29, in <module> yummain.user_main(sys.argv[1:], exit_code=True) File "/usr/share/yum-cli/yummain.py", line 375, in user_main errcode = main(args) File "/usr/share/yum-cli/yummain.py", line 239, in main (result, resultmsgs) = base.buildTransaction() File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1198, in buildTransaction (rescode, restring) = self.resolveDeps() File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 893, in resolveDeps CheckDeps, checkinstalls, checkremoves, missing = self._resolveRequires(errors) File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 1025, in _resolveRequires (checkdep, missing, errormsgs) = self._processReq(po, dep) File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 350, in _processReq CheckDeps, missingdep = self._requiringFromTransaction(po, requirement, errormsgs) File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 680, in _requiringFromTransaction rel=pkg.rel) File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 5280, in update availpkgs = self._compare_providers(availpkgs, requiringPo) File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 1648, in _compare_providers bestnum = max(pkgresults.values()) ValueError: max() arg is an empty sequence Expected results: A readable error is printed. Additional info: I tried that on a 1minutetip machine, but should be reproducible elsewhere as well. It's not causing me any troubles, but I wanted to report this for the case it causes troubles to customers and might not have a reproducer. Feel free to close it if you think this is not worth fixing.
There is no plan to fix this bug during RHEL 7 life cycle. If you still consider the issue important, please contact your support representative.