“java.net.BindException: Address already in use” 当我已经在同一个端口上运行服务时
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"java.net.BindException: Address already in use" when I am already running a service on the same port
提问by user2346809
I have one server socket program, when I run this program I get the following error:
我有一个服务器套接字程序，当我运行这个程序时，我收到以下错误：
java.net.BindException: Address already in use
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:383)
at java.net.ServerSocket.bind(ServerSocket.java:328)
at java.net.ServerSocket.<init>(ServerSocket.java:194)
at Server.main(Server.java:20)
Could not listen on port: 5434.
A postgres sql server is already running on this port, which explains the error. My hardware device only sends data to this 5434 port.
postgres sql server 已经在这个端口上运行，这解释了错误。我的硬件设备只向这个 5434 端口发送数据。
What are my options to get around this error?
我有哪些选择可以解决此错误？
回答by Scary Wombat
If the port is being used by postgresql then you cant also open this port as a server port. Either shut postgresql down or use another port.
如果 postgresql 正在使用该端口，那么您也不能将此端口作为服务器端口打开。关闭 postgresql 或使用另一个端口。
回答by Eric Leschinski
Find out what program is using your port:
找出正在使用您的端口的程序：
sudo netstat -nlp | grep 514
udp 0 0 :::514 :::* 30186/java
Tells me that a java program is binding on UDP port 514
告诉我一个 java 程序绑定在 UDP 端口 514
回答by neoneye
Mac specific
Mac 专用
An instance of my java program was already running and occupying the port. So when I tried starting a new instance then I got the error. In order to kill the old instance I do the following:
我的 java 程序的一个实例已经在运行并占用了端口。所以当我尝试启动一个新实例时，我得到了错误。为了杀死旧实例，我执行以下操作：
prompt> lsof -i:5434
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 71107 neoneye 68u IPv6 0x4a0371dea87d2cd3 0t0 TCP *:http-alt (LISTEN)
prompt> kill 71107
btw. I don't recommend stopping postgresql this way.
顺便提一句。我不建议以这种方式停止 postgresql。
回答by java.nazif
You should change your port number. I had the same error. After I changed my port number, it resolved.
您应该更改您的端口号。我有同样的错误。更改端口号后，它解决了。
