dubbo 调用服务超时

先贴出错误报告：

Failed to invoke the method *** in the service ***.

Tried  times of the providers [192.168.1.174:] (/) from the registry 127.0.0.1: on the consumer 192.168.1.174 using the dubbo version 2.5.. 

Last error is: Invoke remote method timeout. method: addShopCoupons, 

provider: dubbo://192.168.1.174:20882/***?anyhost=true&application=springboot-server&check=false&dubbo=2.5.3&executes=300&group=***&interface=***&logger=slf4j&methods=***&pid=7440&retries=0&revision=1.0-SNAPSHOT&side=consumer&timeout=150000&timestamp=1522740735099&version=1.0-SNAPSHOT, 

cause: Waiting server-side response timeout.
start time: -- ::35.043, end time: -- ::05.054, client elapsed:  ms, server elapsed:  ms, timeout:  ms, request: Request [id=, version=2.0., twoway=true, event=false, broken=false, data=RpcInvocation [methodName=***, parameterTypes=[class ***entityPO], arguments=[***ENTITYpo@2aa67b77], attachments={path=***, interface=***, version=1.0-SNAPSHOT, timeout=, group=***}]], channel: /192.168.1.174: -> /192.168.1.174:

查看zookeeper的服务日志：

[consumer: //192.168.1.174/***?app
    lication = springboot - server & category = consumers & check = false & dubbo = .
    5.3 & group = *** & interface = *** &
    methods = *** & pid =  & retries =  & revision = 1.0 - SNAPSHOT &
    side = consumer & timeout =  & timestamp =  & version = 1.0 - S
    NAPSHOT
]

因为报的错是dubbo timeout，就先检查配置文件：

　　提供服务端：

　　消费服务端：

原因：

　　调用的返回值在Provider端序列化失败（如传输对象没有实现Serializable接口），Provider端也没有异常输出，Consumer端超时出错

解决：

　　将传递的entittyPO实现Serializable接口，再次尝试，问题解决