ADB server didn't ACK問題

轉：http://jacky-zhang.iteye.com/blog/888933

以前運行eclipse執行android應用都沒問題，今天忽然出問題了，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，重啓了幾回模擬器和eclipse仍是不行，上網查了下資料~ 

解決辦法： 

（1）查看任務管理器，關閉全部adb.exe 

（2）重啓eclipse便可