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Cannot open connection
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org.hibernate.exception.GenericJDBCException: Cannot open connection	at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)	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:426)	at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)	at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:119)	at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)	at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)	at business.PersistMemberListServlet.doPost(PersistMemberListServlet.java:48)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)