Bonjour,

J'aiu essayé de faire mon 1er exemple avec Hibernate. Quand je lance mon appli, j'ai ce msg d'erreur :
     [java] log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
     [java] log4j:WARN Please initialize the log4j system properly.
     [java] 15 févr. 2006 10:55:25 MappingXML modificationPOJO
     [java] GRAVE: Cannot open connection
     [java] org.hibernate.exception.GenericJDBCException: Cannot open connection
     [java] at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:91)
     [java] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:79)
     [java] at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
     [java] at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
     [java] at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:363)
     [java] at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:122)
     [java] at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:125)
     [java] at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
     [java] at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1309)
     [java] at MappingXML.insertXMLBuffer(Unknown Source)
     [java] at MappingXML.main(Unknown Source)
     [java] Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!
     [java] at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:104)
     [java] at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:236)
     [java] at com.mchange.v2.c3p0.PoolBackedDataSource.getConnection(PoolBackedDataSource.java:94)
     [java] at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:35)
     [java] at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:360)
     [java] ... 6 more
     [java] Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
     [java] at com.mchange.v2.resourcepool.BasicResourcePool.awaitAcquire(BasicResourcePool.java:970)
     [java] at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:208)
     [java] at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:232)
     [java] ... 9 more
     [java] Exception in thread "main"
     [java] Java Result: 1

Quelqu'un aurait une idée sur l'origine ?
Merci