Another app is currently holding the yum lock; waiting for it to exit 解决方法

Another app is currently holding the yum lock; waiting for it to exit...
The other application is: PackageKit
Memory : 46 M RSS (925 MB VSZ)
Started: Thu Jul 6 08:40:45 2017 - 01:57 ago
State : Running, pid: 10884

解决方法：手工杀死yum进程

sudo kill -9 10884