小编MSq*_*red的帖子

我有一个播放框架Java应用程序(播放v1.2.5)大约一个月工作,然后产生以下错误:

An unexpected error occured caused by exception PersistenceException: org.hibernate.exception.GenericJDBCException: Cannot open connection

play.exceptions.UnexpectedException: Unexpected Error
        at play.Invoker$Invocation.onException(Invoker.java:244)
        at play.Invoker$Invocation.run(Invoker.java:286)
        at Invocation.HTTP Request(Play!)
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Cannot open connection
        at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1389)
        at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1317)
        at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:1399)
        at org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:63)
        at play.db.jpa.JPAPlugin.startTx(JPAPlugin.java:377)
        at play.db.jpa.JPAPlugin.beforeInvocation(JPAPlugin.java:345)
        at play.plugins.PluginCollection.beforeInvocation(PluginCollection.java:473)
        at play.Invoker$Invocation.before(Invoker.java:217)
        at play.Invoker$Invocation.run(Invoker.java:277)
        ... 1 more
Caused by: org.hibernate.exception.GenericJDBCException: Cannot open connection
        at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140)
        at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52)
        at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449)
        at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
        at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:160)
        at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:81)
        at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1473)
        at org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:60)
        ... 6 more …