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Description of problem:
Trying to upgrade to RHEL 7.3.1 with etcd installed.

# yum upgrade (or yum upgrade etcd)
Loaded plugins: search-disabled-repos
Resolving Dependencies
--> Running transaction check
---> Package etcd.x86_64 0:2.3.7-4.el7 will be obsoleted
---> Package etcd3.x86_64 0:3.0.14-1.el7 will be obsoleting
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package         Arch             Version                 Repository       Size
================================================================================
Installing:
 etcd3           x86_64           3.0.14-1.el7            extra           9.4 M
     replacing  etcd.x86_64 2.3.7-4.el7

Transaction Summary
================================================================================
Install  1 Package

Total download size: 9.4 M

# grep -i obso ~/rpmbuild/SPECS/etcd3.spec 
Obsoletes: etcd

How reproducible:
always

*** This bug has been marked as a duplicate of bug 1395359 ***