java dubbo 连接 zk 报错 Session 0x0 for server 127.0.0.1/＜unresolved＞:2181, unexpected error, closing so

配置正常，zk 启动正常，但是就是连接不上
看下是否是你的项目使用 JDK 版本过高

我这里使用的是 17 ，调成 1.8 版本即可

provider 配置如下

报错如下图

16:09:43.754 [main-SendThread(127.0.0.1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server 127.0.0.1/:2181, unexpected error, closing socket connection and attempting reconnect
java.nio.channels.UnresolvedAddressException: null
	at java.base/sun.nio.ch.Net.checkAddress(Net.java:149)
	at java.base/sun.nio.ch.Net.checkAddress(Net.java:157)
	at java.base/sun.nio.ch.SocketChannelImpl.checkRemote(SocketChannelImpl.java:816)
	at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:839)
	at org.apache.zookeeper.ClientCnxnSocketNIO.registerAndConnect(ClientCnxnSocketNIO.java:277)
	at org.apache.zookeeper.ClientCnxnSocketNIO.connect(ClientCnxnSocketNIO.java:287)
	at org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:1021)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1064)
16:09:43.757 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during shutdown input
java.net.SocketException: Socket is not connected
	at java.base/sun.nio.ch.Net.translateToSocketException(Net.java:181)
	at java.base/sun.nio.ch.Net.translateException(Net.java:217)
	at java.base/sun.nio.ch.Net.translateException(Net.java:223)
	at java.base/sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:392)
	at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:200)
	at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1250)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1174)
Caused by: java.nio.channels.NotYetConnectedException: null
	at java.base/sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:1098)
	at java.base/sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:390)
	... 3 common frames omitted
16:09:43.757 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during shutdown output
java.net.SocketException: Socket is not connected
	at java.base/sun.nio.ch.Net.translateToSocketException(Net.java:181)
	at java.base/sun.nio.ch.Net.translateException(Net.java:217)
	at java.base/sun.nio.ch.Net.translateException(Net.java:223)
	at java.base/sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:401)
	at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:207)
	at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1250)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1174)
Caused by: java.nio.channels.NotYetConnectedException: null
	at java.base/sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:1115)
	at java.base/sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:399)
	... 3 common frames omitted
16:09:44.867 [main-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 127.0.0.1/:2181. Will not attempt to authenticate using SASL (unknown error)
16:09:44.867 [main-SendThread(127.0.0.1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server 127.0.0.1/:2181, unexpected error, closing socket connection and attempting reconnect
java.nio.channels.UnresolvedAddressException: null
	at java.base/sun.nio.ch.Net.checkAddress(Net.java:149)
	at java.base/sun.nio.ch.Net.checkAddress(Net.java:157)
	at java.base/sun.nio.ch.SocketChannelImpl.checkRemote(SocketChannelImpl.java:816)
	at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:839)
	at org.apache.zookeeper.ClientCnxnSocketNIO.registerAndConnect(ClientCnxnSocketNIO.java:277)
	at org.apache.zookeeper.ClientCnxnSocketNIO.connect(ClientCnxnSocketNIO.java:287)
	at org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:1021)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1064)
16:09:44.868 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during shutdown input
java.net.SocketException: Socket is not connected
	at java.base/sun.nio.ch.Net.translateToSocketException(Net.java:181)
	at java.base/sun.nio.ch.Net.translateException(Net.java:217)
	at java.base/sun.nio.ch.Net.translateException(Net.java:223)
	at java.base/sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:392)
	at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:200)
	at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1250)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1174)
Caused by: java.nio.channels.NotYetConnectedException: null
	at java.base/sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:1098)
	at java.base/sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:390)
	... 3 common frames omitted
16:09:44.868 [main-SendThread(127.0.0.1:2181)] DEBUG org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during shutdown output
java.net.SocketException: Socket is not connected
	at java.base/sun.nio.ch.Net.translateToSocketException(Net.java:181)
	at java.base/sun.nio.ch.Net.translateException(Net.java:217)
	at java.base/sun.nio.ch.Net.translateException(Net.java:223)
	at java.base/sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:401)
	at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:207)
	at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1250)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1174)
Caused by: java.nio.channels.NotYetConnectedException: null
	at java.base/sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:1115)
	at java.base/sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:399)
	... 3 common frames omitted
16:09:45.975 [main-SendThread(127.0.0.1:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server 127.0.0.1/:2181. Will not attempt to authenticate using SASL (unknown error)
16:09:45.975 [main-SendThread(127.0.0.1:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server 127.0.0.1/:2181, unexpected error, closing socket connection and attempting reconnect