dubbo连接超时：org.apache.dubbo.rpc.RpcException: Invoke remote method timeout.

        报错信息：

org.apache.dubbo.rpc.RpcException: Invoke remote method timeout. method: getEasybuyUserListByMap, provider: dubbo://192.168.52.1:20880/com.buy.service.easybuyUser.EasybuyUserService?anyhost=true&application=buy-user-consumer&bean.name=ServiceBean:com.buy.service.easybuyUser.EasybuyUserService&check=false&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&interface=com.buy.service.easybuyUser.EasybuyUserService&lazy=false&methods=queryEasybuyUserPageByMap,getEasybuyUserListByMap,itriptxModifyEasybuyUser,itriptxAddEasybuyUser,getEasybuyUserCountByMap,getEasybuyUserById,itriptxDeleteEasybuyUserById&pid=19876&qos.enable=false&register=true&register.ip=192.168.52.1&release=2.7.3&remote.application=buy-user-provider&revision=1.0-SNAPSHOT&side=consumer&sticky=false&timestamp=1630382237309, cause: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-31 11:57:42.790, end time: 2021-08-31 11:57:43.812, client elapsed: 75 ms, server elapsed: 947 ms, timeout: 1000 ms, request: Request [id=0, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=getEasybuyUserListByMap, parameterTypes=[interface java.util.Map], arguments=[{ mobile=15239908002}], attachments={ path=com.buy.service.easybuyUser.EasybuyUserService, interface=com.buy.service.easybuyUser.EasybuyUserService, version=0.0.0}]], channel: /192.168.52.1:55674 -> /192.168.52.1:20880
    at org.apache.dubbo.rpc.protocol.AsyncToSyncInvoker.invoke(AsyncToSyncInvoker.java:63) ~[dubbo-2.7.3.jar:2.7.3]
    Caused by: java.util.concurrent.ExecutionException: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-31 11:57:42.790, end time: 2021-08-31 11:57:43.812, client elapsed: 75 ms, server elapsed: 947 ms, timeout: 1000 ms, request: Request [id=0, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=getEasybuyUserListByMap, parameterTypes=[interface java.util.Map], arguments=[{ mobile=15239908002}], attachments={ path=com.buy.service.easybuyUser.EasybuyUserService, interface=com.buy.service.easybuyUser.EasybuyUserService, version=0.0.0}]], channel: /192.168.52.1:55674 -> /192.168.52.1:20880
    at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) ~[na:1.8.0_152]
    at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915) ~[na:1.8.0_152]
    at org.apache.dubbo.rpc.protocol.AsyncToSyncInvoker.invoke(AsyncToSyncInvoker.java:56) ~[dubbo-2.7.3.jar:2.7.3]
    ... 72 common frames omitted
Caused by: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-31 11:57:42.790, end time: 2021-08-31 11:57:43.812, client elapsed: 75 ms, server elapsed: 947 ms, timeout: 1000 ms, request: Request [id=0, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=getEasybuyUserListByMap, parameterTypes=[interface java.util.Map], arguments=[{ mobile=15239908002}], attachments={ path=com.buy.service.easybuyUser.EasybuyUserService, interface=com.buy.service.easybuyUser.EasybuyUserService, version=0.0.0}]], channel: /192.168.52.1:55674 -> /192.168.52.1:20880
    at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:189) ~[dubbo-2.7.3.jar:2.7.3]
    at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:153) ~[dubbo-2.7.3.jar:2.7.3]
    at org.apache.dubbo.remoting.exchange.support.DefaultFuture$TimeoutCheckTask.run(DefaultFuture.java:252) ~[dubbo-2.7.3.jar:2.7.3]
    at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:648) ~[dubbo-2.7.3.jar:2.7.3]
    at org.apache.dubbo.common.timer.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:727) ~[dubbo-2.7.3.jar:2.7.3]
    at org.apache.dubbo.common.timer.HashedWheelTimer$Worker.run(HashedWheelTimer.java:449) ~[dubbo-2.7.3.jar:2.7.3]
    ... 1 common frames omitted

        导致原因：

        看到错误信息日志，可以知道是超时错误，再往下看，看到服务端即消费者端通道已经关闭。此时我们需要设置一个超时时间。

        消费者端：

dubbo:
  application:
    name: buy-user-consumer
  registry:
    address: zookeeper://127.0.0.1:2181
  consumer:
    timeout: 50000

        提供者端：

dubbo:
  application:
    name: buy-user-provider
  registry:
    address: zookeeper://127.0.0.1:2181
  protocol:
    port: 20880
  provider:
    timeout: 50000

        这样就完成了。