adb server is out of date. killing...

1.最近使用adb的时候总是报下面的提示

C:\Users\xxxx>adb start-server
adb server is out of date.  killing...
ADB server didn't ACK
* failed to start daemon *

2.使用如下命令查看

adb nodaemon server  

3.使用如下命令查看那个程序占用了5037端口

C:\Users\xxxxxx>netstat -ano | findstr "5037"
  TCP    127.0.0.1:5037         0.0.0.0:0              LISTENING       4236

4.干点4236进程

tskill 4236

5.执行adb命令

adb devices

问题解决！