springboot-dubbo cannot be cast to問題及解決

Posted on by

springboot-dubbo cannot be cast to

使用spring boot 集成dubbo的時候遇到問題：

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>

估計是和dubbo有點沖突

dubbo報錯總結

作為一個dubbo使用新手，有必要總結一些常見的dubbo問題，提升解決問題的套路。

1.dubbo consumer 調用provider報錯（1）- No provider available

問題：

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

如下圖所示：

dubbo報錯

原因：  

根據源碼的截圖所示（下圖），就兩個原因： 

1）No service provider  

2）Service providers are disabled

源碼分析

解決辦法：  

1).provider部署分支不正確，部署正確的分支。  

2).consumer部署分支的zookeeper地址不正確。

2.dubbo consumer調用provider報錯（2）

問題：

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.

問題截圖

原因：

源碼分析

調用鏈路：invoke()–>checkWhetherDestroyed()

consumer端調用的時候，發現出現實例已經destory，就拋出此異常

懷疑是由於內存不足，dubbo進程觸發瞭spring的destroy()方法，同時就執行到瞭AbstractClusterInvoker.destroy()，但是此時進程並沒有掛掉，所以就出現瞭可以調用，但是調用失敗的情況。

解決方法：  

1）查看provider服務器是否內存不夠，kill掉不相幹的進程。  

2）重啟provider服務。

3.dubbo consumer 調用provider報錯（3）- NoSuchMethodException

問題：

Caused by: com.alibaba.dubbo.common.bytecode.NoSuchMethodException: Not found method “getSocialResourceByRegionId” in class com.missfresh.product.center.service.impl.SocialResourceServiceImpl.

問題截圖

原因：  

dubbo服務部署的分支裡沒有相關接口的實現。

解決方法：  

部署對應的分支。或者是直接部署master。

4.dubbo consumer 調用provider報錯（4）- Thread pool is EXHAUSTED!

問題：

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

問題截圖

原因：

原因分析

如上圖所示，provider服務支持的最大線程數為300。

解決方法：  

檢查程序中並發采用的線程池初始化值，是否合理。最大線程個數不能大於300.

總結

以上為個人經驗，希望能給大傢一個參考，也希望大傢多多支持WalkonNet。

推薦閱讀：