ava.lang.IllegalArgumentException: no server available

前言

在搭建SpringCloudAlibaba 的nacos时，项目搭建完成，可以构建成功，然后项目在启动时报错：

---

2020-04-25 11:04:11.304 ERROR 893 --- [TaskScheduler-1] o.s.c.a.nacos.discovery.NacosWatch       : Error watching Nacos Service change

java.lang.IllegalArgumentException: no server available
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:354) ~[nacos-client-1.0.0.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:346) ~[nacos-client-1.0.0.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:294) ~[nacos-client-1.0.0.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.getServiceList(NamingProxy.java:276) ~[nacos-client-1.0.0.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.getServiceList(NamingProxy.java:252) ~[nacos-client-1.0.0.jar:na]
	at com.alibaba.nacos.client.naming.NacosNamingService.getServicesOfServer(NacosNamingService.java:525) ~[nacos-client-1.0.0.jar:na]
	at org.springframework.cloud.alibaba.nacos.discovery.NacosWatch.nacosServicesWatch(NacosWatch.java:127) ~[spring-cloud-alibaba-nacos-discovery-0.9.0.RELEASE.jar:0.9.0.RELEASE]
	at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_151]
	at java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:308) ~[na:1.8.0_151]
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:1.8.0_151]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) ~[na:1.8.0_151]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) ~[na:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_151]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_151]
	at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_151]

分析原因

通过错误信息我们首先看到时Nacos服务相关错误，因为我本地是刚搭建的环境,

经过漫长的百度查阅文档：

解决方案：

原来是版本冲突，我使用的是Springboot2.2.6RELEASE，跟SpringCloudAlibaba版本冲突，所以修改一下版本，就解决了问题以及配置文件里面写错了一个单词

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

<!--整合Springcloud-->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--整合Springcloud alibaba-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>0.9.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

        </dependencies>
    </dependencyManagement>