B4J Question How solve Error JVM_Bind (jnetwork Lib) ??

[behnam_tr]

Hi everyone
I can not find a solution to this error. Thanks to friends who know how to help.
This problem did not exist before the update to version 9.50 !!

I Attach original project based on Erel Topic :

[B4X] Network + AsyncStreams + B4XSerializator

Better implementation, based on B4XPages: https://www.b4x.com/android/forum/threads/b4x-b4xpages-network-asyncstreams-b4xserializator.119011/#content New video tutorial: This is a simple and important example. It demonstrates several good practices related to network...

www.b4x.com

Also system Firewall is turned off .

Waiting for debugger to connect...
Program started.
Error occurred on line: 32 (Main)
java.net.BindException: Address already in use: JVM_Bind
    at java.net.DualStackPlainSocketImpl.bind0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketBind(DualStackPlainSocketImpl.java:102)
    at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:513)
    at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:180)
    at java.net.ServerSocket.bind(ServerSocket.java:375)
    at java.net.ServerSocket.<init>(ServerSocket.java:237)
    at java.net.ServerSocket.<init>(ServerSocket.java:128)
    at anywheresoftware.b4a.objects.SocketWrapper$ServerSocketWrapper.Initialize(SocketWrapper.java:226)
    at b4j.example.main._appstart(main.java:111)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:629)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:237)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:111)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:98)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:98)
    at b4j.example.main.start(main.java:38)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$8(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$7(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$5(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$6(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$4(WinApplication.java:185)
    at java.lang.Thread.run(Thread.java:748)

 

[Erel]

This problem did not exist before the update to version 9.50 !!

The error has nothing to do with B4J version.

As the error message say, you are trying to open a port that is already opened by a different process.

 

[behnam_tr]

Will the port that is opened remain open until it is closed ??
I get the same error after restarting the system ??
What is the solution ?? How to close the port and open it again ??

 

[Erel]

The port remains open until it is explicitly closed or the process is killed.

I get the same error after restarting the system ??

Maybe a different program opens it.
How to find open ports: https://stackoverflow.com/questions...-is-listening-on-a-tcp-or-udp-port-on-windows

 

[behnam_tr]

The port remains open until it is explicitly closed or the process is killed.

Maybe a different program opens it.
How to find open ports: https://stackoverflow.com/questions...-is-listening-on-a-tcp-or-udp-port-on-windows

I checked the cases but it was not resolved.
I even checked all the open ports with TCPView software, but the port I want is not open at all !!

https://docs.microsoft.com/en-us/sysinternals/downloads/tcpview

I think the problem is from somewhere else, but where ?!