Notes - record a cannotfinddatasourceexception: dynamic datasource can not find primary datasource problem solving

Problem scenario

take Springboot Project upgrade to Springcloud project , Because of the configuration Multiple data sources , There are a lot of strange pits .

among , There is one CannotFindDataSourceException: dynamic-datasource can not find primary datasource pit , I've been thinking about it for a long time , Miraculously solved .

The solution is strange , Please keep looking down .

Environment configuration

• nacos 1.3.0
• dynamic-datasource 3.5.0

Problem list and solutions

dynamic-datasource please check the setting of primary

appear dynamic-datasource please check the setting of primary This kind of problem , If the configuration files are correct , The following error reports still appear ：

Show the current dynamic-datasource Dependent versions and Springboot Version incompatibility problem

Need to upgrade dynamic-datasource Of pom edition .
Reference blog

dynamic-datasource can not find primary datasource

If the configuration information is correct , Also aim at spring.datasource.dynamic.datasource Data sources in , Added default master node , Or configure other node names .

If it is Configure other names , You need to add spring.datasource.dynamic.datasource.primary Point to .

Pay attention here , If... Is set spring.datasource.dynamic.datasource.xxxx.poolName.
that spring.datasource.dynamic.datasource.primary Will find the corresponding poolName Matching node configuration information .

If nacos in , The configuration file requirements are normal , The configuration information in the configuration center is still unavailable , Or after the configuration file changes , There is no automatic pull configuration and restart in the program log printing log Print , At this time, the most direct way ：

restart nacos！
Reference blog