Nacos和GateWay路由转发NotFoundException: 503 SERVICE_UNAVAILABLE “Unable to find

雨点打透心脏的1/2处 2024-03-23 23:19 59阅读 0赞

## 问题再现： ##

> 2023-08-15 16:51:16,151 DEBUG \[reactor-http-nio-2\]\[CompositeLog.java:147\] - \[dc73b32c-1\] Encoding \[\{timestamp=Tue Aug 15 16:51:16 CST 2023, path=/content/course/list, status=503, error=Service Unavai (truncated)...\]  
> 2023-08-15 16:51:16,175 TRACE \[reactor-http-nio-2\]\[GatewayMetricsFilter.java:115\] - gateway.requests tags: \[tag(httpMethod=POST),tag(httpStatusCode=503),tag(outcome=SERVER\_ERROR),tag(routeId=content-api),tag(routeUri=lb://content-api),tag(status=SERVICE\_UNAVAILABLE)\]  
> 2023-08-15 16:51:16,187 DEBUG \[reactor-http-nio-2\]\[Loggers.java:254\] - \[id: 0xdc73b32c, L:/127.0.0.1:63010 - R:/127.0.0.1:53113\] Decreasing pending responses, now 0  
> 2023-08-15 16:51:16,190 DEBUG \[reactor-http-nio-2\]\[Loggers.java:249\] - \[id: 0xdc73b32c, L:/127.0.0.1:63010 - R:/127.0.0.1:53113\] Last HTTP packet was sent, terminating the channel  
> 2023-08-15 16:51:16,192 DEBUG \[reactor-http-nio-2\]\[LogFormatUtils.java:91\] - \[dc73b32c-1\] Completed 503 SERVICE\_UNAVAILABLE  
> 2023-08-15 16:51:16,195 DEBUG \[reactor-http-nio-2\]\[Loggers.java:249\] - \[id: 0xdc73b32c, L:/127.0.0.1:63010 - R:/127.0.0.1:53113\] Last HTTP response frame  
> 2023-08-15 16:51:16,203 DEBUG \[reactor-http-nio-2\]\[Loggers.java:254\] - \[id: 0xdc73b32c, L:/127.0.0.1:63010 - R:/127.0.0.1:53113\] FluxReceive\{pending=0, cancelled=true, inboundDone=false, inboundError=null\}: dropping frame DefaultLastHttpContent(data: PooledSlicedByteBuf(ridx: 0, widx: 53, cap: 53/53, unwrapped: PooledUnsafeDirectByteBuf(ridx: 296, widx: 296, cap: 2048)), decoderResult: success)  
> 2023-08-15 16:51:16,205 DEBUG \[reactor-http-nio-2\]\[Loggers.java:259\] - \[id: 0xdc73b32c, L:/127.0.0.1:63010 - R:/127.0.0.1:53113\] onUncaughtException(SimpleConnection\{channel=\[id: 0xdc73b32c, L:/127.0.0.1:63010 - R:/127.0.0.1:53113\]\})  
> java.io.IOException: 远程主机强迫关闭了一个现有的连接。  
> at sun.nio.ch.SocketDispatcher.read0(Native Method)  
> at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)  
> at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)  
> at sun.nio.ch.IOUtil.read(IOUtil.java:192)  
> at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)  
> at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253)  
> at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1134)  
> at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)  
> at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151)  
> at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)  
> at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655)  
> at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581)  
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)  
> at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)  
> at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)  
> at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)  
> at java.lang.Thread.run(Thread.java:750)  
> 2023-08-15 16:51:16,432 DEBUG \[com.alibaba.nacos.naming.failover\]\[FailoverReactor.java:147\] - failover switch is not found, failover00-00---000-VIPSRV\_FAILOVER\_SWITCH-000---00-00  
> 2023-08-15 16:51:17,002 DEBUG \[PollingServerListUpdater-0\]\[PropertySourcesPropertyResolver.java:115\] - Found key 'spring.profiles.active' in PropertySource 'configurationProperties' with value of type String  
> 2023-08-15 16:51:17,003 DEBUG \[PollingServerListUpdater-0\]\[HostReactor.java:306\] - failover-mode: false  
> 2023-08-15 16:51:17,003 DEBUG \[PollingServerListUpdater-0\]\[DynamicServerListLoadBalancer.java:241\] - List of Servers for content-api obtained from Discovery client: \[\]  
> 2023-08-15 16:51:17,003 DEBUG \[PollingServerListUpdater-0\]\[DynamicServerListLoadBalancer.java:246\] - Filtered List of Servers for content-api obtained from Discovery client: \[\]

## 问题前提的环境配置： ##

首先我的nacos上都已经成功注册上了两个服务

![b0bfaa2681a1417d8cfd949effbd6b7c.png][]

其中Gateway的nacos上的配置和本地的配置分别为

server:
      port: 63010 # 网关端口
    spring:
      cloud:
        gateway:
          discovery:
            locator:
              lowerCaseServiceId: true
              # 让gateway根据注册中心找到其他服务
              enabled: true
          routes: 
            - id: content-api # 路由id，自定义，只要唯一即可
              uri: lb://content-api # 路由的目标地址 lb就是负载均衡，后面跟服务名称
              predicates: # 路由断言，也就是判断请求是否符合路由规则的条件
                - Path=/content/** # 这个是按照路径匹配，只要以/content/开头就符合要求
            - id: system-api
              uri: lb://system-api
              predicates:
                - Path=/system/**

#微服务配置
    spring:
      application:
        name: gateway
      cloud:
        nacos:
          server-addr: 192.168.101.65:8848
          discovery:
            namespace: ${spring.profiles.active}
            group: EducationPlatform-project
          config:
            namespace: ${spring.profiles.active}
            group: EducationPlatform-project
            file-extension: yaml
            refresh-enabled: true
            shared-configs:
              - data-id: logging-${spring.profiles.active}.yaml
                group: EducationPlatform-common
                refresh: true
      profiles:
        active: dev11

而content-api的nacos上的配置和本地的配置分别为

server:
      servlet:
        context-path: /content
      port: 63040
    
    test_config:
     a: 3a
     b: 3b
    
    #配置本地优先
    spring:
     cloud:
      config:
        override-none: true

#微服务配置
    spring:
      application:
        name: content-api
      cloud:
        nacos:
          server-addr: 192.168.101.65:8848
          discovery:
            namespace: ${spring.profiles.active}
            group: EducationPlatform
            username: nacos
            password: nacos
          config:
            namespace: ${spring.profiles.active}
            group: EducationPlatform
            file-extension: yaml
            refresh-enabled: true
            extension-configs:
              - data-id: content-service-${spring.profiles.active}.yaml
                group: EducationPlatform
                refresh: true
            shared-configs:
              - data-id: swagger-${spring.profiles.active}.yaml
                group: EducationPlatform-common
                refresh: true
              - data-id: logging-${spring.profiles.active}.yaml
                group: EducationPlatform-common
                refresh: true
      profiles:
        active: dev11

而发送了一个这个请求

![1103b8dad75947f8a8ce2f65153e5d25.png][]

## 问题解决： ##

首先可以在idea里快速的按两下shift，然后搜这个方法名，打个断点看看方法能不能送到这里来，可以看到我这的uri已经是有了的，证明配置和服务都没有问题，问题缩小到路由转发出了问题。

![2a0e532a68bc40429514db06e0f6c3c2.png][]

其次这两个问题报错也让我们要注意的问题就是转发问题

> Zone aware logic disabled or there is only one zone

> NotFoundException: 503 SERVICE\_UNAVAILABLE "Unable to find instance for content-api

### 一、pom配置 ###

因为路由转发配置上用到了**lb:**，这个是负载均衡的标志，而在`Spring Cloud 2020`版本以后，就移除了[Ribbon][]负载均衡器，官方默认推荐使用`Spring Cloud Loadbalancer`正式替换`Ribbon。因此我们需要把Spring Cloud Loadbalancer加载到pom里面`

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-loadbalancer</artifactId>
                <optional>true</optional>
            </dependency>

实在不行的再加载这两个

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>

### 二、小细节 ###

我是加上了pom都还不行的，而后面发现我的group是不同的，在nacos中group的作用就是区分不同类型的配置文件，进行分组管理

![87eb10570d304d78bd7d9ff55e4a0084.png][]

相同Data Id而不同Group的意义就在相当于相同的目录下不同的文件，不同group直接的服务调用是只能通过额外config里配置

![4225aaac93544afcab5a83db2ba1250a.png][]

![8b715d8acc0647c7bfd3249d0e2e15f2.png][]

因此解决办法就是把nacos中的group的后缀都改成-project，本地配置中的也改了然后实在不行的话Gateway配置上再添加上lowerCaseServiceId: true

重启服务即可

![e24a9473cc9b4bcaae54f8d59faadde1.png][]

[b0bfaa2681a1417d8cfd949effbd6b7c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/13/5f8ac29436cd4d5e805212ffec6b6eb7.png
[1103b8dad75947f8a8ce2f65153e5d25.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/13/4d3db197ca6d4b4e8ace7996175d0c89.png
[2a0e532a68bc40429514db06e0f6c3c2.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/13/9d4daa9666a04d619d6deddf9dafca98.png
[Ribbon]: https://so.csdn.net/so/search?q=Ribbon&spm=1001.2101.3001.7020
[87eb10570d304d78bd7d9ff55e4a0084.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/13/f73498a5b014416b987557049d439402.png
[4225aaac93544afcab5a83db2ba1250a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/13/6cfce3136b174361a50543c4800f4a87.png
[8b715d8acc0647c7bfd3249d0e2e15f2.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/13/320c57a489ba413997c0629d7ddd550d.png
[e24a9473cc9b4bcaae54f8d59faadde1.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/13/77570f84583e441b91df74d7a3f2c168.png