org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for columns: [org.hibernate.mapping.Column(students)]
You are using field access strategy (determined by @Id annotation). Put any JPA related annotation right above each field instead of getter property
@OneToMany(targetEntity=Student.class, mappedBy="college", fetch=FetchType.EAGER)
private List<Student> students;
Adding the @ElementCollection to the List field solved this issue:
@Column
@ElementCollection(targetClass=Integer.class)
private List<Integer> countries;