springboot项目启动报错：dynamic-datasource can not find primary datasource

项目启动报错信息

Caused by: com.baomidou.dynamic.datasource.exception.CannotFindDataSourceException: dynamic-datasource can not find primary datasource
	at com.baomidou.dynamic.datasource.DynamicRoutingDataSource.determinePrimaryDataSource(DynamicRoutingDataSource.java:91)
	at com.baomidou.dynamic.datasource.DynamicRoutingDataSource.getDataSource(DynamicRoutingDataSource.java:120)
	at com.baomidou.dynamic.datasource.DynamicRoutingDataSource.determineDataSource(DynamicRoutingDataSource.java:78)
	at com.baomidou.dynamic.datasource.ds.AbstractRoutingDataSource.getConnection(AbstractRoutingDataSource.java:48)
	at com.baomidou.dynamic.datasource.ds.AbstractRoutingDataSource$$FastClassBySpringCGLIB$$dffddd61.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:793)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)
	at io.seata.spring.annotation.datasource.SeataAutoDataSourceProxyAdvice.invoke(SeataAutoDataSourceProxyAdvice.java:57)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:708)
	at com.baomidou.dynamic.datasource.DynamicRoutingDataSource$$EnhancerBySpringCGLIB$$606bf0df.getConnection(<generated>)
	at io.seata.rm.datasource.DataSourceProxy.init(DataSourceProxy.java:101)
	at io.seata.rm.datasource.DataSourceProxy.<init>(DataSourceProxy.java:96)
	at io.seata.rm.datasource.DataSourceProxy.<init>(DataSourceProxy.java:81)
	at io.seata.spring.annotation.datasource.DataSourceProxyHolder.createDsProxyByMode(DataSourceProxyHolder.java:97)
	at io.seata.spring.annotation.datasource.DataSourceProxyHolder.putDataSource(DataSourceProxyHolder.java:88)
	at io.seata.spring.annotation.datasource.SeataDataSourceBeanPostProcessor.postProcessAfterInitialization(SeataDataSourceBeanPostProcessor.java:58)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:455)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1808)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620)
	... 100 common frames omitted

报错原因分析

1.可能是引入了多数据源又没有使用，导致的报错

解决方案

注释掉上边两个依赖

		<!-- Druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid.version}</version>
        </dependency>

        <!-- Dynamic DataSource -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
            <version>${dynamic-ds.version}</version>
        </dependency>

2.我的项目中使用了多数据源，所以这种解决方式不可行

查看maven的配制文件，看是否加载了配制信息

看这块是否选择了正确的环境。

3.我的项目中使用的是本地环境，也就是local，然后我就去跟了下代码

发现这里报错500,报错信息为：config data not exist。

说明没有获取到nacos上的配制文件，我又去检查了下pom.xml文件。

查看后发现本地环境上配置的nacosNamespace不对，更改之后启动成功。

4.如果pom.xml文件能跟nacos对应上，但是启动报错，可能是有缓存，可重启nacos