alguem conhece esse erro??
2004-12-20 13:57:50,835 INFO [net.sf.hibernate.dialect.Dialect] Using dialect: net.sf.hibernate.dialect.PostgreSQLDialect
2004-12-20 13:57:50,837 INFO [net.sf.hibernate.cfg.SettingsFactory] Use outer join fetching: false
2004-12-20 13:57:50,838 INFO [net.sf.hibernate.util.NamingHelper] JNDI InitialContext properties:{}
2004-12-20 13:57:50,886 INFO [net.sf.hibernate.connection.DatasourceConnectionProvider] Using datasource: java:/PostgresDS
2004-12-20 13:57:50,886 INFO [net.sf.hibernate.transaction.TransactionFactoryFactory] Transaction strategy: net.sf.hibernate.transaction.JTATransactionFactory
2004-12-20 13:57:50,887 INFO [net.sf.hibernate.util.NamingHelper] JNDI InitialContext properties:{}
2004-12-20 13:57:50,889 INFO [net.sf.hibernate.transaction.TransactionManagerLookupFactory] instantiating TransactionManagerLookup: net.sf.hibernate.transaction.JBossTransactionManagerLookup
2004-12-20 13:57:50,889 INFO [net.sf.hibernate.transaction.TransactionManagerLookupFactory] instantiated TransactionManagerLookup
2004-12-20 13:57:50,890 INFO [net.sf.hibernate.util.NamingHelper] JNDI InitialContext properties:{}
2004-12-20 13:57:50,894 INFO [net.sf.hibernate.transaction.TransactionManagerLookupFactory] instantiating TransactionManagerLookup: net.sf.hibernate.transaction.JBossTransactionManagerLookup
2004-12-20 13:57:50,894 INFO [net.sf.hibernate.transaction.TransactionManagerLookupFactory] instantiated TransactionManagerLookup
2004-12-20 13:57:50,905 INFO [net.sf.hibernate.cfg.SettingsFactory] Use scrollable result sets: true
2004-12-20 13:57:50,906 INFO [net.sf.hibernate.cfg.SettingsFactory] Use JDBC3 getGeneratedKeys(): false
2004-12-20 13:57:50,906 INFO [net.sf.hibernate.cfg.SettingsFactory] Optimize cache for minimal puts: false
2004-12-20 13:57:50,906 INFO [net.sf.hibernate.cfg.SettingsFactory] Query language substitutions: {}
2004-12-20 13:57:50,907 INFO [net.sf.hibernate.cfg.SettingsFactory] cache provider: net.sf.ehcache.hibernate.Provider
2004-12-20 13:57:50,907 INFO [net.sf.hibernate.cfg.Configuration] instantiating and configuring caches
2004-12-20 13:57:50,908 INFO [net.sf.hibernate.impl.SessionFactoryImpl] building session factory
2004-12-20 13:57:50,910 DEBUG [net.sf.hibernate.impl.SessionFactoryImpl] instantiating session factory with properties: {java.vendor=Sun Microsystems Inc., os.name=Linux, sun.boot.class.path=/opt/java/programs/j2sdk1.4.2_05/jre/lib/rt.jar:/opt/java/programs/j2sdk1.4.2_05/jre/lib/i18n.jar:/opt/java/programs/j2sdk1.4.2_05/jre/lib/sunrsasign.jar:/opt/java/programs/j2sdk1.4.2_05/jre/lib/jsse.jar:/opt/java/programs/j2sdk1.4.2_05/jre/lib/jce.jar:/opt/java/programs/j2sdk1.4.2_05/jre/lib/charsets.jar:/opt/java/programs/j2sdk1.4.2_05/jre/classes, sun.java2d.fontpath=, java.vm.specification.vendor=Sun Microsystems Inc., java.runtime.version=1.4.2_05-b04, user.name=root, jboss.bind.address=0.0.0.0, hibernate.session_factory_name=java:/hibernate/HibernateFactory, jboss.home.dir=/opt/java/programs/jboss-3.2.2, user.language=en, java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory, sun.boot.library.path=/opt/java/programs/j2sdk1.4.2_05/jre/lib/i386, jboss.home.url=file:/opt/java/programs/jboss-3.2.2/, java.version=1.4.2_05, version=2.4.1, user.timezone=America/Sao_Paulo, jboss.server.home.dir=/opt/java/programs/jboss-3.2.2/server/default, sun.arch.data.model=32, hibernate.use_outer_join=false, java.endorsed.dirs=/opt/java/programs/j2sdk1.4.2_05/jre/lib/endorsed, jboss.server.home.url=file:/opt/java/programs/jboss-3.2.2/server/default/, sun.cpu.isalist=, file.encoding.pkg=sun.io, file.separator=/, java.specification.name=Java Platform API Specification, hibernate.cglib.use_reflection_optimizer=true, java.class.version=48.0, jboss.server.config.url=file:/opt/java/programs/jboss-3.2.2/server/default/conf/, user.country=US, java.home=/opt/java/programs/j2sdk1.4.2_05/jre, java.vm.info=mixed mode, jboss.lib.url=file:/opt/java/programs/jboss-3.2.2/lib/, os.version=2.4.20, hibernate.connection.datasource=java:/PostgresDS, hibernate.transaction.factory_class=net.sf.hibernate.transaction.JTATransactionFactory, path.separator=:, java.vm.version=1.4.2_05-b04, java.util.prefs.PreferencesFactory=java.util.prefs.FileSystemPreferencesFactory, vendor-url=http://xml.apache.org/xalan-j, java.protocol.handler.pkgs=org.jboss.net.protocol, java.awt.printerjob=sun.print.PSPrinterJob, vendor=Apache Software Foundation, sun.io.unicode.encoding=UnicodeLittle, jboss.server.temp.dir=/opt/java/programs/jboss-3.2.2/server/default/tmp, java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces, user.home=/root, java.rmi.server.RMIClassLoaderSpi=org.jboss.system.JBossRMIClassLoader, java.specification.vendor=Sun Microsystems Inc., org.xml.sax.driver=org.apache.crimson.parser.XMLReaderImpl, java.library.path=/opt/java/programs/j2sdk1.4.2_05/jre/lib/i386/client:/opt/java/programs/j2sdk1.4.2_05/jre/lib/i386:/opt/java/programs/j2sdk1.4.2_05/jre/../lib/i386, java.vendor.url=http://java.sun.com/, program.name=run.sh, java.vm.vendor=Sun Microsystems Inc., hibernate.dialect=net.sf.hibernate.dialect.PostgreSQLDialect, java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition, java.class.path=/opt/java/jboss/bin/run.jar:/lib/tools.jar, jbossmx.loader.repository.class=org.jboss.mx.loading.UnifiedLoaderRepository3, java.vm.specification.name=Java Virtual Machine Specification, java.vm.specification.version=1.0, sun.cpu.endian=little, sun.os.patch.level=unknown, jboss.server.lib.url=file:/opt/java/programs/jboss-3.2.2/server/default/lib/, java.rmi.server.codebase=http://0.0.0.0:8083/, java.io.tmpdir=/tmp, java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport.cgi, jboss.server.data.dir=/opt/java/programs/jboss-3.2.2/server/default/data, os.arch=i386, java.awt.graphicsenv=sun.awt.X11GraphicsEnvironment, java.ext.dirs=/opt/java/programs/j2sdk1.4.2_05/jre/lib/ext, user.dir=/opt/java/programs/jboss-3.2.2/bin, line.separator=
, java.vm.name=Java HotSpot(TM) Client VM, jboss.server.base.dir=/opt/java/programs/jboss-3.2.2/server, jboss.server.base.url=file:/opt/java/programs/jboss-3.2.2/server/, file.encoding=ANSI_X3.4-1968, jta.UserTransaction=java:/UserTransaction, hibernate.transaction.manager_lookup_class=net.sf.hibernate.transaction.JBossTransactionManagerLookup, java.specification.version=1.4, jboss.server.name=default, hibernate.show_sql=false}
2004-12-20 13:57:59,759 INFO [net.sf.hibernate.jmx.HibernateServiceMBean] Could not build SessionFactory using the MBean classpath - will try again using client classpath: could not instantiate id generator
2004-12-20 13:57:59,761 DEBUG [net.sf.hibernate.jmx.HibernateServiceMBean] Error was
net.sf.hibernate.MappingException: could not instantiate id generator
at net.sf.hibernate.id.IdentifierGeneratorFactory.create(IdentifierGeneratorFactory.java:82)
at net.sf.hibernate.mapping.SimpleValue.createIdentifierGenerator(SimpleValue.java:80)
at net.sf.hibernate.persister.AbstractEntityPersister.<init>(AbstractEntityPersister.java:631)