boot版本配置多数据库失败

一、该问题的重现步骤是什么？

1. autoconfigure:
       exclude: com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceAutoConfigure
     datasource:
       dynamic:
         primary: master
         strict: false
         datasource:
           master:
             url: jdbc:mysql://*****************?useSSL=false&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true&serverTimezone=GMT%2B8&nullCatalogMeansCurrent=true&allowPublicKeyRetrieval=true
             username: *****************
             password: *****************
           slave:
             url: jdbc:mysql://*****************?useSSL=false&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true&serverTimezone=GMT%2B8&nullCatalogMeansCurrent=true&allowPublicKeyRetrieval=true
             username: *****************
             password: *****************

2. 


***************************

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 suitable jdbc url

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 (the profiles dev are currently active).

3.boot版本2.9.1版本配置多数据库时启动失败

二、你期待的结果是什么？实际看到的又是什么？

三、你正在使用的是什么产品，什么版本？在什么操作系统上？

四、请提供详细的错误堆栈信息，这很重要。

五、若有更多详细信息，请在下面提供。