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org.hibernate.exception.GenericJDBCException: Cannot open connection*	at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)	at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)	at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:301)	at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:110)	at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:137)	at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:49)	at org.hibernate.transaction.JDBCTransactionFactory.beginTransaction(JDBCTransactionFactory.java:24)	at org.hibernate.jdbc.JDBCContext.beginTransaction(JDBCContext.java:271)	at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1079)	at com.plumtree.analytics.core.persist.EventLoader.loadFromStream(EventLoader.java:100)	at com.plumtree.analytics.core.persist.EventLoader.main(EventLoader.java:638)