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解決Exception：Could not open Hibernate Session for transaction; nested exception is java.lang.NoClassDefFoundError: org/hibernate/engine/transaction/spi/TransactionContext
解決Could not open Hibernate Session for transaction; nested exception is java.lang.NoClassDefFoundError: org/hibernate/engine/transaction/spi/TransactionContext
關於Hibernate Could not obtain transaction-synchronized Session for current thread
Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionExcep linux下mysql修改連接超時wait_timeout修改后就ok了
org.hibernate.HibernateException: Could not obtain transaction-synchronized Session for current thread
Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: Cannot open connection
org.springframework.transaction.CannotCreateTransactionException Could not open
SSH項目過一段時間之后再訪問會報一次Could not open Hibernate session for transaction 異常，Caused by: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlyi，再重新方法即可訪問成功（通常出現在過了一晚之后再去訪問系統）
[springboot jpa] [bug] Could not open JPA EntityManager for transaction
解決Hibernate：could not initialize proxy - no Session