The connection to adb is down, and a severe error has occured.分析

                     这几天 在写android的时候启动eclipse后用genymotion调试老师出现这个错误，

        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:\adt-bundle-windows-x86_64-20140702\sdk\platform-tools\adb.exe' and can be executed.

       我就纳闷了 我也没干什么坏事，怎么就不行了，经过多方卖查找资料总算知道了。

        原来是genymotion自带了adb 然后eclipse也带了adb两个的端口号还都一样，当你先启动了genymotion的adb那你的eclipse肯定就会报这个错误了。

       解决方法就是，你先把eclipse的adb先启动了，让genymotion的adb启动不了或者是你把adb关了  至于怎么关， 相信你都会了