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springboot-dubbo cannot be cast to问题及解决

作者：勤奋的蜗牛t 时间：2022-06-27 14:46:51　

springboot-dubbo cannot be cast to

使用spring boot 集成dubbo的时候遇到问题：

2018-05-22 14:41:35.108 ERROR 2224 --- [:20880-thread-2] c.a.dubbo.rpc.filter.ExceptionFilter     :  [DUBBO] Got unchecked and undeclared exception which called by 10.0.75.1. service: com.neo.facade.UseServiceFacade, method: getAll, exception: com.alibaba.dubbo.rpc.RpcException: Failed to invoke remote proxy method getAll to registry://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=provider&dubbo=2.5.3&export=dubbo％3A％2F％2F10.0.75.1％3A20880％2Fcom.neo.facade.UseServiceFacade％3Fanyhost％3Dtrue％26application％3Dprovider％26dubbo％3D2.5.3％26interface％3Dcom.neo.facade.UseServiceFacade％26methods％3DgetAll％2CgetOne％2Cupdate％2Cinsert％2Cdelete％26pid％3D2224％26revision％3D1.0.0％26side％3Dprovider％26timestamp％3D1526971274301％26version％3D1.0.0&pid=2224&registry=zookeeper×tamp=1526971274290, cause: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService, dubbo version: 2.5.3, current host: 127.0.0.1
 
com.alibaba.dubbo.rpc.RpcException: Failed to invoke remote proxy method getAll to registry://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=provider&dubbo=2.5.3&export=dubbo％3A％2F％2F10.0.75.1％3A20880％2Fcom.neo.facade.UseServiceFacade％3Fanyhost％3Dtrue％26application％3Dprovider％26dubbo％3D2.5.3％26interface％3Dcom.neo.facade.UseServiceFacade％26methods％3DgetAll％2CgetOne％2Cupdate％2Cinsert％2Cdelete％26pid％3D2224％26revision％3D1.0.0％26side％3Dprovider％26timestamp％3D1526971274301％26version％3D1.0.0&pid=2224&registry=zookeeper×tamp=1526971274290, cause: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService
    at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:76) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:53) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:64) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:60) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:112) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:38) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:108) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:84) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:170) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:52) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:82) [dubbo-2.5.3.jar:2.5.3]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService
    at com.alibaba.dubbo.common.bytecode.Wrapper1.invokeMethod(Wrapper1.java) ~[na:2.5.3]
    at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:46) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:72) ~[dubbo-2.5.3.jar:2.5.3]
    ... 25 common frames omitted
Caused by: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService
    ... 28 common frames omitted
 
2018-05-22 14:41:35.126 ERROR 2224 --- [:20880-thread-3] c.a.dubbo.rpc.filter.ExceptionFilter     :  [DUBBO] Got unchecked and undeclared exception which called by 10.0.75.1. service: com.neo.facade.UseServiceFacade, method: getAll, exception: com.alibaba.dubbo.rpc.RpcException: Failed to invoke remote proxy method getAll to registry://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=provider&dubbo=2.5.3&export=dubbo％3A％2F％2F10.0.75.1％3A20880％2Fcom.neo.facade.UseServiceFacade％3Fanyhost％3Dtrue％26application％3Dprovider％26dubbo％3D2.5.3％26interface％3Dcom.neo.facade.UseServiceFacade％26methods％3DgetAll％2CgetOne％2Cupdate％2Cinsert％2Cdelete％26pid％3D2224％26revision％3D1.0.0％26side％3Dprovider％26timestamp％3D1526971274301％26version％3D1.0.0&pid=2224&registry=zookeeper×tamp=1526971274290, cause: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService, dubbo version: 2.5.3, current host: 127.0.0.1
 
com.alibaba.dubbo.rpc.RpcException: Failed to invoke remote proxy method getAll to registry://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=provider&dubbo=2.5.3&export=dubbo％3A％2F％2F10.0.75.1％3A20880％2Fcom.neo.facade.UseServiceFacade％3Fanyhost％3Dtrue％26application％3Dprovider％26dubbo％3D2.5.3％26interface％3Dcom.neo.facade.UseServiceFacade％26methods％3DgetAll％2CgetOne％2Cupdate％2Cinsert％2Cdelete％26pid％3D2224％26revision％3D1.0.0％26side％3Dprovider％26timestamp％3D1526971274301％26version％3D1.0.0&pid=2224&registry=zookeeper×tamp=1526971274290, cause: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService
    at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:76) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:53) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:64) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:60) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:112) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:38) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:108) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:84) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:170) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:52) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:82) [dubbo-2.5.3.jar:2.5.3]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService
    at com.alibaba.dubbo.common.bytecode.Wrapper1.invokeMethod(Wrapper1.java) ~[na:2.5.3]
    at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:46) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:72) ~[dubbo-2.5.3.jar:2.5.3]
    ... 25 common frames omitted
Caused by: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService
    ... 28 common frames omitted
 
2018-05-22 14:41:35.133 ERROR 2224 --- [:20880-thread-4] c.a.dubbo.rpc.filter.ExceptionFilter     :  [DUBBO] Got unchecked and undeclared exception which called by 10.0.75.1. service: com.neo.facade.UseServiceFacade, method: getAll, exception: com.alibaba.dubbo.rpc.RpcException: Failed to invoke remote proxy method getAll to registry://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=provider&dubbo=2.5.3&export=dubbo％3A％2F％2F10.0.75.1％3A20880％2Fcom.neo.facade.UseServiceFacade％3Fanyhost％3Dtrue％26application％3Dprovider％26dubbo％3D2.5.3％26interface％3Dcom.neo.facade.UseServiceFacade％26methods％3DgetAll％2CgetOne％2Cupdate％2Cinsert％2Cdelete％26pid％3D2224％26revision％3D1.0.0％26side％3Dprovider％26timestamp％3D1526971274301％26version％3D1.0.0&pid=2224&registry=zookeeper×tamp=1526971274290, cause: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService, dubbo version: 2.5.3, current host: 127.0.0.1
 
com.alibaba.dubbo.rpc.RpcException: Failed to invoke remote proxy method getAll to registry://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=provider&dubbo=2.5.3&export=dubbo％3A％2F％2F10.0.75.1％3A20880％2Fcom.neo.facade.UseServiceFacade％3Fanyhost％3Dtrue％26application％3Dprovider％26dubbo％3D2.5.3％26interface％3Dcom.neo.facade.UseServiceFacade％26methods％3DgetAll％2CgetOne％2Cupdate％2Cinsert％2Cdelete％26pid％3D2224％26revision％3D1.0.0％26side％3Dprovider％26timestamp％3D1526971274301％26version％3D1.0.0&pid=2224&registry=zookeeper×tamp=1526971274290, cause: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService
    at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:76) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:53) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:64) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:60) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:112) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:38) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:108) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:84) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:170) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:52) [dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:82) [dubbo-2.5.3.jar:2.5.3]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService
    at com.alibaba.dubbo.common.bytecode.Wrapper1.invokeMethod(Wrapper1.java) ~[na:2.5.3]
    at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:46) ~[dubbo-2.5.3.jar:2.5.3]
    at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:72) ~[dubbo-2.5.3.jar:2.5.3]
    ... 25 common frames omitted
Caused by: java.lang.ClassCastException: com.neo.service.UserService cannot be cast to com.neo.service.UserService
    ... 28 common frames omitted

是由spring-boot-devtools引起的

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

估计是和dubbo有点冲突

dubbo报错总结

作为一个dubbo使用新手，有必要总结一些常见的dubbo问题，提升解决问题的套路。

1.dubbo consumer 调用provider报错（1）- No provider available

问题：

No provider available from registry xxx from service xxx on consumer xxx may be providers disabled or not registrered。

如下图所示：

springboot-dubbo cannot be cast to问题及解决

原因：&emsp;&emsp;

根据源码的截图所示（下图），就两个原因：&emsp;

1）No service provider&emsp;&emsp;

2）Service providers are disabled

springboot-dubbo cannot be cast to问题及解决

解决办法：&emsp;&emsp;

1).provider部署分支不正确，部署正确的分支。&emsp;&emsp;

2).consumer部署分支的zookeeper地址不正确。

2.dubbo consumer调用provider报错（2）

问题：

com.alibaba.dubbo.rpc.RpcException: Rpc cluster invoker for interface xxx on consumer 10.2.4.63 use dubbo version 2.6.0.2 is now destroyed! Can not invoke any more.

springboot-dubbo cannot be cast to问题及解决

原因：

springboot-dubbo cannot be cast to问题及解决

调用链路：invoke()&ndash;>checkWhetherDestroyed()

consumer端调用的时候，发现出现实例已经destory，就抛出此异常

怀疑是由于内存不足，dubbo进程触发了spring的destroy()方法，同时就执行到了AbstractClusterInvoker.destroy()，但是此时进程并没有挂掉，所以就出现了可以调用，但是调用失败的情况。

解决方法：&emsp;&emsp;

1）查看provider服务器是否内存不够，kill掉不相干的进程。&emsp;&emsp;

2）重启provider服务。

3.dubbo consumer 调用provider报错（3）- NoSuchMethodException

问题：

Caused by: com.alibaba.dubbo.common.bytecode.NoSuchMethodException: Not found method &ldquo;getSocialResourceByRegionId&rdquo; in class com.missfresh.product.center.service.impl.SocialResourceServiceImpl.

springboot-dubbo cannot be cast to问题及解决

原因：&emsp;&emsp;

dubbo服务部署的分支里没有相关接口的实现。

解决方法：&emsp;&emsp;

部署对应的分支。或者是直接部署master。

4.dubbo consumer 调用provider报错（4）- Thread pool is EXHAUSTED!

问题：

com.alibaba.dubbo.rpc.RpcException: Failed to invoke the method queryProductSalsPromotionTagList in the service com.missfresh.product.center.service.IProductCategorysService. Tried 1 times of the providers

springboot-dubbo cannot be cast to问题及解决

原因：

springboot-dubbo cannot be cast to问题及解决

如上图所示，provider服务支持的最大线程数为300。

解决方法：&emsp;&emsp;

检查程序中并发采用的线程池初始化值，是否合理。最大线程个数不能大于300.

来源：https://blog.csdn.net/VictorStephen/article/details/80405602

标签：springboot,dubbo,cannot,cast
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