org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is java.lang.NullPointerException

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Root Cause Analysis

  1. org.springframework.transaction.CannotCreateTransactionException

    Could not open JPA EntityManager for transaction; nested exception is java.lang.NullPointerException

    at org.springframework.orm.jpa.JpaTransactionManager.doBegin()
  2. Spring ORM
    JpaTransactionManager.doBegin
    1. org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:431)[spring-orm-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    1 frame
  3. Spring Tx
    AbstractPlatformTransactionManager.getTransaction
    1. org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)[spring-tx-4.1.6.RELEASE.jar:4.1.6.RELEASE]
    1 frame