A DESCRIPTION OF THE PROBLEM :
Having a java server process which creates a multitude of TCP ServerSocket, it happens sometimes that some other OS process occupies the desired TCP port. The resulting exception is as follows:

JDK 8 stack trace:
java.net.BindException: Address already in use: JVM_Bind
at java.net.DualStackPlainSocketImpl.bind0(Native Method)
at java.net.DualStackPlainSocketImpl.socketBind(DualStackPlainSocketImpl.java:106)
at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387)
at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:190)
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 BindTest.main(BindTest.java:8)

JDK 11 stack trace:
java.net.BindException: Address already in use: NET_Bind
at java.base/java.net.PlainSocketImpl.bind0(Native Method)
at java.base/java.net.PlainSocketImpl.socketBind(PlainSocketImpl.java:132)
at java.base/java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:436)
at java.base/java.net.ServerSocket.bind(ServerSocket.java:381)
at java.base/java.net.ServerSocket.<init>(ServerSocket.java:243)
at java.base/java.net.ServerSocket.<init>(ServerSocket.java:135)
at BindTest.main(BindTest.java:8)

JDK 13 stack trace:
Exception in thread "main" 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:491)
at java.base/sun.nio.ch.Net.bind(Net.java:480)
at java.base/sun.nio.ch.NioSocketImpl.bind(NioSocketImpl.java:643)
at java.base/java.net.ServerSocket.bind(ServerSocket.java:396)
at java.base/java.net.ServerSocket.<init>(ServerSocket.java:282)
at java.base/java.net.ServerSocket.<init>(ServerSocket.java:173)
at BindTest.main(BindTest.java:8)

Having this stacktrace, it is very difficult to understand which port causes the bind failure.
A message that adds address/port info like "Address already in use: NET_Bind <address:port>" should be better.

Here is a simple repro code that creates two ServerSocket on same port locally - the same happens if the port is occuped by another OS process:

import java.net.ServerSocket;
public class BindTest {
public static void main(String[] args) {
try {
try (ServerSocket s1 = new ServerSocket(8080)) {
try (ServerSocket s2 = new ServerSocket(8080)) {
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}