Nacos配置获取为空？Ignore the empty nacos configuration and get it based on dataId 一次完整的排错经历与解决方案

原创已于 2025-11-08 14:55:43 修改 · 286 阅读

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#java #开发语言 #springboot #nacos

于 2025-11-08 14:55:09 首次发布

最近在部署一个Spring Cloud项目时，遇到了一个典型的Nacos配置问题：应用启动时报错数据源配置缺失，但检查代码发现配置明明已经在Nacos中配置了。错误信息如下：

2025-11-08 10:55:50,261 WARN [main][NacosPropertySourceBuilder.java:87] - Ignore the empty nacos configuration and get it based on dataId[content-api.yaml] & group[xuecheng-plus-project]


***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class

所有配置Data ID都显示"Ignore the empty nacos configuration"，这意味着Nacos返回了空配置

没有详细信息直接配置日志输出详细内容

配置文件中配置

logging:
  config: classpath:log4j2-dev.xml

log4j2-dev.xml如下复制粘贴就行

<?xml version="1.0" encoding="UTF-8"?>
<Configuration monitorInterval="180" packages="">
    <properties>
        <property name="logdir">logs</property>
        <property name="PATTERN">%date{YYYY-MM-dd HH:mm:ss,SSS} %level [%thread][%file:%line] - %msg%n%throwable</property>
    </properties>
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="${PATTERN}"/>
        </Console>

        <!-- Nacos专用日志文件 -->
        <RollingFile name="NacosAppender" fileName="${logdir}/nacos.log"
            filePattern="${logdir}/$${date:yyyy-MM-dd}/nacos.%d{yyyy-MM-dd-HH}.log" append="true">
            <PatternLayout pattern="${PATTERN}"/>
            <Policies>
                <TimeBasedTriggeringPolicy interval="1" modulate="true" />
            </Policies>
        </RollingFile>

        <!--异步appender-->
        <Async name="AsyncAppender" includeLocation="true">
            <AppenderRef ref="NacosAppender"/>
        </Async>
    </Appenders>

    <Loggers>
        <!-- ========== Nacos配置加载详细日志 ========== -->
        <!-- Spring Cloud Nacos集成 -->
        <logger name="com.alibaba.cloud.nacos" level="TRACE" additivity="false">
            <AppenderRef ref="NacosAppender"/>
            <AppenderRef ref="Console"/>
        </logger>
        
        <!-- Nacos客户端核心包 -->
        <logger name="com.alibaba.nacos" level="TRACE" additivity="false">
            <AppenderRef ref="NacosAppender"/>
            <AppenderRef ref="Console"/>
        </logger>
        
        <!-- Nacos配置客户端 -->
        <logger name="com.alibaba.nacos.client.config" level="TRACE" additivity="false">
            <AppenderRef ref="NacosAppender"/>
            <AppenderRef ref="Console"/>
        </logger>
        
        <logger name="com.alibaba.nacos.client.config.impl" level="TRACE" additivity="false">
            <AppenderRef ref="NacosAppender"/>
            <AppenderRef ref="Console"/>
        </logger>
        
        <!-- Nacos HTTP请求相关 -->
        <logger name="com.alibaba.nacos.client.config.http" level="TRACE" additivity="false">
            <AppenderRef ref="NacosAppender"/>
            <AppenderRef ref="Console"/>
        </logger>
        
        <logger name="com.alibaba.nacos.common.http" level="TRACE" additivity="false">
            <AppenderRef ref="NacosAppender"/>
            <AppenderRef ref="Console"/>
        </logger>
        
        <!-- Nacos服务发现 -->
        <logger name="com.alibaba.nacos.client.naming" level="DEBUG" additivity="false">
            <AppenderRef ref="NacosAppender"/>
            <AppenderRef ref="Console"/>
        </logger>

        <!-- ========== Spring Cloud配置加载相关 ========== -->
        <logger name="org.springframework.cloud.bootstrap" level="DEBUG" additivity="false">
            <AppenderRef ref="NacosAppender"/>
            <AppenderRef ref="Console"/>
        </logger>
        
        <logger name="org.springframework.cloud.bootstrap.config" level="TRACE" additivity="false">
            <AppenderRef ref="NacosAppender"/>
            <AppenderRef ref="Console"/>
        </logger>

        <!-- ========== 根日志配置 ========== -->
        <Root level="INFO" includeLocation="true">
            <AppenderRef ref="AsyncAppender"/>
            <AppenderRef ref="Console"/>
        </Root>
    </Loggers>
</Configuration>

之后可以看到日志输出下面的这样信息然后可以看到Nacos客户端成功连接到了Nacos服务器（192.168.88.128:8848），这说明网络连接和基础配置是正确的那大概率是配置问题了

2025-11-08 14:49:05,541 INFO [main][LocalConfigInfoProcessor.java:212] - LOCAL_SNAPSHOT_PATH:C:\Users\ruanrenyong\nacos\config
2025-11-08 14:49:05,548 DEBUG [main][NacosRestTemplate.java:476] - HTTP method: GET, url: http://192.168.88.128:8848/nacos/v1/cs/configs?dataId=swagger-dev.yaml&tenant=dev402&group=xuecheng-plus-common, body: null
2025-11-08 14:49:05,549 DEBUG [main][NacosRestTemplate.java:494] - Execute via interceptors :[com.alibaba.nacos.client.config.impl.ConfigHttpClientManager$LimiterHttpClientRequestInterceptor@72e789cb]
2025-11-08 14:49:05,562 INFO [main][Limiter.java:54] - limitTime:5.0

点击nacos配置列表中的配置点击详情可以看到此时的url

发现问题了这命名空间怎么不一样结果发现springboot配置的namespace是命名空间ID 这里却配成了命名空间名称

http://192.168.88.128:8848/nacos/#/configdetail
?serverId=center&dataId=content-api-dev.yaml&group=xuecheng-plus-project
&namespace=content-api-dev&edasAppName=&searchDataId=&searchGroup=&pageSize=10&pageNo=1