在启动MainLaucher.java时，出现Connection refused: no further information错误，小白求解。配置文件默认 没有修改过

[INFO ] 11:58:01.013 org.apache.zookeeper.ClientCnxn$SendThread.logStartConnect(ClientCnxn.java:1032) - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
[INFO ] 11:58:01.014 org.apache.curator.framework.imps.CuratorFrameworkImpl.start(CuratorFrameworkImpl.java:332) - Default schema
[INFO ] 11:58:01.016 com.alibaba.dubbo.registry.support.AbstractRegistry.register(AbstractRegistry.java:273) -  [DUBBO] Register: dubbo://192.168.0.107:16603/cn.wizzer.app.sys.modules.services.SysUserService?anyhost=true&application=wk-nb-dubbo-sys&dubbo=2.6.2&generic=false&interface=cn.wizzer.app.sys.modules.services.SysUserService&methods=updateWithVersion,data,insertRelation,insertWith,fillMenu,insertOrUpdate,dao,getDatas,getMaxId,getSubPath,query,count,getField,vDelete,list,execute,fetchx,getMenusAndButtons,getMap,updateAndIncrIfMatch,updateLinks,getEntityClass,fetchLinks,updateRelation,fastInsert,deleteById,update,insert,insertLinks,getParentPath,delete,updateIgnoreNull,clear,getEntity,updateWith,fetch,exists,getRoleCodeList,deleteByIds,listPage&pid=7260&side=provider&timestamp=1533268680258, dubbo version: 2.6.2, current host: 192.168.0.107
[WARN ] 11:58:02.018 org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1162) - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused: no further information
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
[DEBUG] 11:58:02.024 org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:203) - Ignoring exception during shutdown input
java.nio.channels.ClosedChannelException
	at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:780)
	at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:399)
	at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:200)
	at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1246)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1170)