ulninfo Existing lock /var/run/yum.pid: another copy is running as pid”

While I was trying to make rpm installation by yum, it gave below error [root@veridata ~]# yum install pdksh* Loaded plugins: langpacks, ulninfo Existing lock /var/run/yum.pid: another copy is running as pid 8432. Another app is currently holding the yum lock; waiting for it to exit… The other application is: PackageKit Memory : 85 M Continue reading