Re: locating blocked port

[Celejar <celejar@gmail.com>]

On Tue, 31 Jan 2023 10:05:12 -0500
Haines Brown <haines@histomat.net> wrote:

> I have an  application that refuses to start because  its port is 
> blocked. But I have difficulty knowing what port it is
> 
>    $ java -jar /usr/local/share/JabRef/JabRef-3.2.jar &
>   [1] 4831
>   haines@lenin:~$ Jan 31, 2023 8:36:39 AM  net.sf.jabref.logic.remote.server.Remote
>   ListenerServerLifecycle open
>   WARNING: Port is blocked
>   java.net.BindException: Address already in use
>         at java.base/sun.nio.ch.Net.bind0(Native Method)
>         at java.base/sun.nio.ch.Net.bind(Net.java:555)
>         at java.base/sun.nio.ch.Net.bind(Net.java:544)
>         at java.base/sun.nio.ch.NioSocketImpl.bind(NioSocketImpl.java:643)
>         at java.base/java.net.ServerSocket.bind(ServerSocket.java:388)
>         at java.base/java.net.ServerSocket.<init>(ServerSocket.java:274)
>         at net.sf.jabref.logic.remote.server.RemoteListenerServer.<init>(RemoteListenerServer.java:40)
>         at net.sf.jabref.logic.remote.server.RemoteListenerServerThread.<init>(RemoteListenerServerThread.java:33)
>         at net.sf.jabref.logic.remote.server.RemoteListenerServerLifecycle.open(RemoteListenerServerLifecycle.java:41)
>         at net.sf.jabref.JabRef.start(JabRef.java:137)
>         at net.sf.jabref.JabRefMain.main(JabRefMain.java:8)
> 
>   Arguments passed on to running JabRef instance. Shutting down.
> 
> How do I know from this what port the java application tried to use?

The documentation is surprisingly poor, but it looks like 6050 is the
default:

https://github.com/JabRef/jabref/issues/2698
https://github.com/JabRef/jabref/issues/8653

-- 
Celejar