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Hibernate version:
private void deleteStudent(){

Session session = HibernateUtil.getSessionFactory()
.openSession();
session.beginTransaction();
Map<String,String> map = new HashMap<String, String>(10);
map.put("firstName","Ashish");
map.put("lastName","Mark");
DetachedCriteria crit = DetachedCriteria.forClass(Student.class).add(Restrictions.allEq(map));
List insurance = crit.getExecutableCriteria(session).list();
for(Iterator it = insurance.iterator();it.hasNext();){
Student insurance1 = (Student) it.next();
System.out.println("ID: " + insurance1.getStudentId());
System.out.println("Name: " + insurance1.getFirstName()+insurance1.getLastName());

}
session.getTransaction().commit();
System.out.println("Rows affected: " + insurance.size());

}
Mapping documents:

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

Exception in thread "main" org.hibernate.exception.GenericJDBCException: could not execute query
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.loader.Loader.doList(Loader.java:2214)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095)
at org.hibernate.loader.Loader.list(Loader.java:2090)
at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
at StudentRecord.deleteStudent(StudentRecord.java:70)
at StudentRecord.main(StudentRecord.java:96)
Caused by: java.sql.SQLException: ORA-00600: internal error code, arguments: [ttcgcshnd-1], [0], [], [], [], [], [], []

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:169)
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:1826)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2015)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:395)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:339)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1778)
at org.hibernate.loader.Loader.doQuery(Loader.java:662)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
at org.hibernate.loader.Loader.doList(Loader.java:2211)
... 7 more

Problems with Session and transaction handling?

so could any one explain what was wrong in this code( add all jar file and oracle driver zip file also)

Any help would be appricaited

Read this: http://hibernate.org/42.html

Check this link http://ora-00600.ora-code.com/
http://www.adp-gmbh.ch/ora/err/ora_00600.html