• [Y ] I have searched the issues of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 3.1.1
• Operating System version: Windows 10
• Java version: 1.8

Steps to reproduce this issue

1. Run a Dubbo provider with port 20880
2. Run another Dubbo provider with port 20880
3. The second one faild to start

Expected Behavior

Show "Address already in use: bind" or similar message in log

Actual Behavior

Show "java.lang.NullPointerException: null" in log

If there is an exception, please attach the exception trace:

java.lang.NullPointerException: null
	at org.apache.dubbo.remoting.transport.netty4.NettyPortUnificationServer.getLocalAddress(NettyPortUnificationServer.java:221)
	at org.apache.dubbo.remoting.transport.AbstractServer.<init>(AbstractServer.java:75)
	at org.apache.dubbo.remoting.api.pu.AbstractPortUnificationServer.<init>(AbstractPortUnificationServer.java:46)
	at org.apache.dubbo.remoting.transport.netty4.NettyPortUnificationServer.<init>(NettyPortUnificationServer.java:82)
	at org.apache.dubbo.remoting.transport.netty4.NettyPortUnificationTransporter.bind(NettyPortUnificationTransporter.java:32)
	at org.apache.dubbo.remoting.api.pu.PortUnificationTransporter$Adaptive.bind(PortUnificationTransporter$Adaptive.java)
	at org.apache.dubbo.remoting.exchange.PortUnificationExchanger.lambda$bind$0(PortUnificationExchanger.java:41)
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)