yum提示Another app is currently holding the yum lock; waiting for it to exit...

       一般用yum安装环境或者插件很方便，今天遇到一个错误

# yum -y install gcc-C++
Loaded plugins: fastestmirror, refresh-packagekit, security
Existing lock /var/run/yum.pid: another copy is running as pid 25960.
Another app is currently holding the yum lock; waiting for it to exit...

        大概意思就是yum处于锁定状态，查资料说出现这种情况一是系统正在自动升级二是yum进行正在运行
        如果是正在升级等升级完就好了，如果错误日志里面出现了pid说明是正在占用，直接kill掉即可

kill -s 9 pid

         如果不确定pid可以用命令进行查看

ps aux |grep yum


          如果kill不管用就直接强制移除

rm -f /var/run/yum.pid