Could not open JPA EntityManager for transaction Could not open JPA EntityManager for transaction
Could not open JPA EntityManager for transaction
Could not open JPA EntityManager for transaction; nested exception is <openjpa-1.2.2-r422266:898935 fatal user error> org.apache.openjpa.persistence.ArgumentException: A JDBC Driver or DataSource class name must be specified in the ConnectionDriverName property.
这个问题 搞了好半天 啊 没有解决啊 transaction exception nested
[解决办法]
检查一下 数据源 配置， 看你的异常应该是 使用 JTA 事物 ，容器没有实例化 EntityManager