ADB server didn't ACK

今天打開eclipse，控制檯報錯：

The connection to adb is down, and a severe error has occured.
You must restart adb and Eclipse.
Please ensure that adb is correctly located at 'D:\android-2.2-windows\tools\adb.exe' and can be executed.

在命令行下運行 adb start-server

errors:

* daemon not running. starting it now *
ADB server didn't ACK
* failed to start daemon *

已經確認adb.exe的路徑沒有問題，重啓了幾次模擬器和eclipse還是不行，上網查了下資料~

解決辦法：

（1）查看任務管理器，關閉所有adb.exe （我的是tadb.exe）。

（2）重啓eclipse即可