adb server is out of date. killing...

在cmd窗口输入adb shell 或 adb connect 等等后，出现如下错误：

adb server is out of date. killing...
ADB server didn't ACK
* failed to start daemon *
error: unknown host service

?

解决方法，打开“任务管理器”，找到豌豆荚的两个进程，结束之。OK！