豌豆荚 ADB server didn't ACK

之前运行eclipse执行android应用都没问题，今天突然出问题了，控制台报错： 

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. 

在命令行下运行 adb start-server 

errors: 

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

已经确认adb.exe的路径没有问题，重启了几次模拟器和eclipse还是不行，最后把豌豆荚，91之类的卸了果断OK。