服务启动失败 Failed to configure a DataSource: 'url'

报错信息

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APPLICATION FAILED TO START
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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
Action:
Consider the following:
    If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
    If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
Process finished with exit code 1

解决方案

• Nacos 没有配置对应服务的数据库连接信息
• 微服务无法连接读取nacos配置信息 (host没配置，本地vpn影响解析等原因)

  其他原因

  :::warning 此报错正常情况下是由于配置文件加载错误导致，虽然 nacos 对应的微服务已经配置配置文件，但是由于 nacos 加载的规则不能正确加载或者不能正确解析。 :::

DEBUG NacosConfigDataLoader 源代码： ① 、②

• ① 获取到 nacos 配置文件结果
• ② 配置文件解析异常内容