描述问题：
15:11:13.226 ERROR --- [http-nio-8005-exec-8] o.a.c.c.C.[.[localhost].[/].[dispatcherServlet] :Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.apache.dubbo.rpc.RpcException: Failed to invoke the method addCart in the service com.ittxc.shopping_common.service.CartService. Tried 3 times of the providers [192.168.100.1:20884] (1/1) from the registry 192.168.100.131:2181 on the consumer 192.168.3.24 using the dubbo version 2.7.8. Last error is: Invoke remote method timeout. method: addCart, provider: dubbo://192.168.100.1:20884/com.ittxc.shopping_common.service.CartService?anyhost=true&application=shopping_cart_customer_api&check=false&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&init=false&interface=com.ittxc.shopping_common.service.CartService&metadata-type=remote&methods=addCart,deleteCartGoods,deleteCartOption,handleCart,findCartList,refreshCartGoods&pid=27588&qos.enable=false®ister.ip=192.168.3.24&release=2.7.8&remote.application=shopping_cart_service&side=consumer&sticky=false×tamp=1676876772457, cause: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2023-02-20 15:11:12.200, end time: 2023-02-20 15:11:13.224, client elapsed: 1 ms, server elapsed: 1023 ms, timeout: 1000 ms, request: Request [id=55, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=addCart, parameterTypes=[class java.lang.Long, class com.ittxc.shopping_common.pojo.CartGoods], arguments=[27, CartGoods(id=null, goodId=149187842867991, goodsName=iphone15, price=8999, headerPic=http://192.168.100.131/group1/M00/00/00/wKhkg2PvaS6AYiDxAAKGtby34p042.jpeg, num=1, orderId=null)], attachments={path=com.ittxc.shopping_common.service.CartService, remote.application=shopping_cart_customer_api, interface=com.ittxc.shopping_common.service.CartService, version=0.0.0}]], channel: /192.168.100.1:52692 -> /192.168.100.1:20884] with root cause
org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2023-02-20 15:11:12.200, end time: 2023-02-20 15:11:13.224, client elapsed: 1 ms, server elapsed: 1023 ms, timeout: 1000 ms, request: Request [id=55, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=addCart, parameterTypes=[class java.lang.Long, class com.ittxc.shopping_common.pojo.CartGoods], arguments=[27, CartGoods(id=null, goodId=149187842867991, goodsName=iphone15, price=8999, headerPic=http://192.168.100.131/group1/M00/00/00/wKhkg2PvaS6AYiDxAAKGtby34p042.jpeg, num=1, orderId=null)], attachments={path=com.ittxc.shopping_common.service.CartService, remote.application=shopping_cart_customer_api, interface=com.ittxc.shopping_common.service.CartService, version=0.0.0}]], channel: /192.168.100.1:52692 -> /192.168.100.1:20884
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:210)
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:175)
at org.apache.dubbo.remoting.exchange.support.DefaultFuture$TimeoutCheckTask.notifyTimeout(DefaultFuture.java:298)
at org.apache.dubbo.remoting.exchange.support.DefaultFuture$TimeoutCheckTask.lambda$run$0(DefaultFuture.java:285)
at org.apache.dubbo.common.threadpool.ThreadlessExecutor.waitAndDrain(ThreadlessExecutor.java:93)
at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:179)
at org.apache.dubbo.rpc.protocol.AsyncToSyncInvoker.invoke(AsyncToSyncInvoker.java:61)
at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78)
at org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:89)
at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:83)
at org.apache.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:51)
at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:83)
at org.apache.dubbo.rpc.filter.ConsumerContextFilter.invoke(ConsumerContextFilter.java:69)
at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:83)
at org.apache.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:56)
at org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:82)
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:260)
at org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor.intercept(ClusterInterceptor.java:47)
at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$InterceptorInvokerNode.invoke(AbstractCluster.java:92)
at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:88)
at org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:74)
at org.apache.dubbo.common.bytecode.proxy0.addCart(proxy0.java)
at com.ittxc.shopping_cart_customer_api.controller.CartController.addCart(CartController.java:43)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:834)解决方案：
@DubboReference(timeout = 3000) private CartService cartService;
