ADB server didn't ACK

C:\Users\deaokylin>adb start-server
* daemon not running. starting it now on port 5037 *
ADB server didn't ACK
* failed to start daemon *


C:\Users\deaokylin>netstat -ano | findstr "5037"
  TCP    127.0.0.1:5037         0.0.0.0:0              LISTENING       8596
  TCP    127.0.0.1:5037         127.0.0.1:21256        ESTABLISHED     8596
  TCP    127.0.0.1:21256        127.0.0.1:5037         ESTABLISHED     10204


任务管理器杀死pid对应程序

C:\Users\deaokylin>adb start-server
* daemon not running. starting it now on port 5037 *
* daemon started successfully *