eclipse串連不上模擬器的問題：ADB server didn’t ACK

之前運行eclipse執行android應用都沒問題，今天突然出問題了，控制台報錯：

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.

在命令列下運行 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，重啟了幾次模擬器和eclipse還是不行，上網查了下資料~

解決辦法：

（1）查看工作管理員，關閉所有adb.exe

（2）重啟eclipse即可

也有人說是豌豆莢的原因，把豌豆莢關了就行了。