Hibernate version:
Version 3.0.5

Name and version of the database you are using:
Oracle 9.0.1.1.1

JDBC Driver:
Oracle JDBC Driver for Oracle 9i (9.0.1.1.0): classes12.jar

Error Summary:
I have a GenericJDBCException thrown when I try to use the Hibernate Artifact Generation wizard of the Hibernate Tools alpha4 plugin for Eclipse IDE. There's no problem connecting directly to the Oracle-DB via JDBC...

Thanks in advance!

hibernate.cfg.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.url">jdbc:oracle:thin:@10.21.0.200:1521:ezs</property>
<property name="hibernate.cglib.use_reflection_optimizer">true</property>
<property name="hibernate.connection.password">manager</property>
<property name="hibernate.connection.username">system</property>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.dialect">org.hibernate.dialect.Oracle9Dialect</property>
<property name="hibernate.default_schema">EZS</property>
<property name="hibernate.connection.isolation">2</property>
<property name="hibernate.show_sql">true</property>
</session-factory>
</hibernate-configuration>


Full stack trace of any exception that occurs:
org.hibernate.exception.GenericJDBCException: Could not get list of tables from database. Probably a JDBC driver problem.
Configured schema:EZS
Configured catalog:null
?? Couldn't get schemas ??
Available catalogs:

at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)
at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)
at org.hibernate.cfg.JDBCBinder.readTables(JDBCBinder.java:619)
at org.hibernate.cfg.JDBCBinder.readDatabaseSchema(JDBCBinder.java:118)
at org.hibernate.cfg.JDBCBinder.readFromDatabase(JDBCBinder.java:91)
at org.hibernate.cfg.JDBCMetaDataConfiguration.readFromJDBC(JDBCMetaDataConfiguration.java:37)
at org.hibernate.eclipse.console.wizards.ArtifactGeneratorWizard$3.execute(ArtifactGeneratorWizard.java:237)
at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:77)
at org.hibernate.eclipse.console.wizards.ArtifactGeneratorWizard.buildConfiguration(ArtifactGeneratorWizard.java:234)
at org.hibernate.eclipse.console.wizards.ArtifactGeneratorWizard.doFinish(ArtifactGeneratorWizard.java:164)
at org.hibernate.eclipse.console.wizards.ArtifactGeneratorWizard.access$0(ArtifactGeneratorWizard.java:132)
at org.hibernate.eclipse.console.wizards.ArtifactGeneratorWizard$1.run(ArtifactGeneratorWizard.java:98)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:113)
Caused by: java.sql.SQLException: ORA-00600: Interner Fehlercode, Argumente: [ttcgcshnd-1], [0], [], [], [], [], [], []

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:168)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:208)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:543)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1405)
at oracle.jdbc.ttc7.TTC7Protocol.fetch(TTC7Protocol.java:889)
at oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:1681)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1870)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:363)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:314)
at oracle.jdbc.OracleDatabaseMetaData.getTables(OracleDatabaseMetaData.java:2272)
at org.hibernate.cfg.JDBCBinder.readTables(JDBCBinder.java:579)
... 10 more

I had faced the problem while working with Weblogic 6.1/Oracle combination. It worked fine with Oracle 8i but problem surfaced when I migrated to 9i.
This problem was due to the fact that weblogic.jar (in Weblogic 6.1) contains the class oracle.jdbc.driver.OracleDriver !!! This class is compatible with Oracle 8i but not with 9i.

Once classes12.zip is placed in classpath ahead of everything, this problem will be solved...