代码常见异常

悠悠 2022-01-26 12:47 267阅读 0赞

# 1.在注册中心找不到对应的服务 #

java.lang.IllegalStateException: Failed to check the status of the service com.offcn.sellergoods.service.BrandService. 
    No provider available for the service com.offcn.sellergoods.service.BrandService from the url 
    zookeeper://192.168.25.129:2181/com.alibaba.dubbo.registry.RegistryService?application=youle xuan-manager-
    web&dubbo=2.8.4&interface=com.offcn.sellergoods.service.BrandService&metho 
    ds=update,get,delete,selectOptionList,add,getListByPage&pid=3980&revision=0.0.1-SNAPSHOT& 
    side=consumer&timestamp=1501146823396 to the consumer 172.16.17.14 use dubbo version 2.8.4

这种错误是服务层代码没有成功注册到注册中心导致，请检查一下你的服务层代码是否添加 了@service 注解，并且该注解的包一定是 com.alibaba.dubbo.config.annotation 包，不是org.springframework.stereotype.Service，这个地方极容易出错。另外还有一个原因就是你的 服务层工程由于某些原因没有正常启动，也无法注册到注册中心里。

# 2.无法连接到注册中心 #

[org.apache.zookeeper.ClientCnxn] - Opening socket connection to server 192.168.188.137/192.168.188.137:2181. Will not attempt to authenticate using SASL (unknown error)
    [org.apache.zookeeper.ClientCnxn] - 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.ja va:361)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)  
    [org.apache.zookeeper.ClientCnxnSocketNIO] - Ignoring exception during shutdown input

请检查 IP 与端口是否填写正确，检查注册中心是否正常启动