JDBC Connection commysqlcjjdbcConnectionImpl3ab1ff8d will not be managed by Spring== Preparing select spareplan_iditem_iditemdec_as_numspareplanitem_numspareplanitem_nameitem_detailmodelcapacitystora

This error message is indicating that there is a NullPointerException occurring in the code. The NullPointerException is being thrown at line 174 of the SparePlanServiceImpl class. It seems that the code is trying to access a null object or variable at this line, causing the exception to be thrown.

Additionally, the error message mentions that there is a problem with the JDBC connection. It states that the JDBC Connection will not be managed by Spring, which might indicate that there is an issue with the configuration or management of the database connection.

To resolve this issue, you should check the code at line 174 of the SparePlanServiceImpl class and ensure that all necessary objects and variables are properly initialized before accessing them. Additionally, you should review the configuration and management of the JDBC connection to ensure it is set up correctly