jMeter报错：
Response code: Non HTTP response code: java.net.BindException
Response message: Non HTTP response message: Address already in use: connect
原因：
When an HTTP request is made, an ephemeral port is allocated for the TCP / IP connection. The ephemeral port range is 32678 – 61000. After the client closes the connection, the connection is placed in the TIME-WAIT state for 60 seconds.
If JMeter (HttpClient) is sending thousands of HTTP requests per second and creating new TCP / IP connections, the system will run out of available ephemeral ports for allocation.
Otherwise, the following messages may appear in the JMeter JTL files:
Non HTTP response code: java.net.BindException
Non HTTP response message: Address already in use
The solution is to enable fast recycling TIME_WAIT sockets.
就是处于等待的60s的临时端口不够用了，解决方法就是降低TIME_WAIT时间
方法：
打开注册列表
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
右击Parameters -> 新建 -> DWORD(32位)值(D) -> name：TcpTimedWaitDe，value：30 –> 设置为30秒，默认是240秒
右击Parameters -> 新建 -> DWORD(32位)值(D) -> name：MaxUserPort，value：65534（十进制） –> 设置最大连接数65534
最后重启电脑
转自：https://blog.csdn.net/shuaifanpi/article/details/89137165