Невозможно создать первоначальные соединения пула. Невозможно получить ошибки соединения JDBC. ⇐ JAVA

[Anonymous]

У меня есть JPA-приложение данных Spring Boot, в котором я создаю два источника данных. Я получаю эту ошибку при загрузке приложения.

1. org.apache.tomcat.jdbc.pool.ConnectionPool init
SEVERE: Unable to create initial connections of pool.
java.sql.SQLException
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:253)
2. Caused by: java.lang.NullPointerException
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:245)
... 88 more

3. Jan 20, 2020 7:39:29 PM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: null
[http-bio-8080-exec-1] ERROR org.springframework.boot.web.support.ErrorPageFilter - Forwarding to error page from request [/orderForDateTopK/1/2] due to exception [Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection]
org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:431)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)

4. Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1692)

5. Caused by: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection



Подробнее здесь: https://stackoverflow.com/questions/598 ... nnection-e