Enviar o foto no hibernate - não funciona

Erro: could not insert: [Persistencia.Arquivos]
org.hibernate.exception.DataException: could not insert: [Persistencia.Arquivos]
	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:100)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
	at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64)
	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2186)
	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2666)
	at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71)
	at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
	at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:321)
	at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
	at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
	at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
	at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
	at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:562)
	at org.hibernate.impl.SessionImpl.save(SessionImpl.java:550)
	at org.hibernate.impl.SessionImpl.save(SessionImpl.java:546)
	at Controlador.IncluirArquivos.doPost(IncluirArquivos.java:80)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Unknown Source)
Caused by: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'arquivo' at row 1
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2939)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1623)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1715)
	at com.mysql.jdbc.Connection.execSQL(Connection.java:3249)
	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1268)
	at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1541)
	at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1455)
	at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1440)
	at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:94)
	at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:57)
	... 30 more

@SuppressWarnings("unchecked")
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		boolean isMultiplad = ServletFileUpload.isMultipartContent(request);
		
		System.out.println(isMultiplad);
		
		Arquivos ar = new Arquivos();
		
		if(isMultiplad){
			FileItemFactory factory = new DiskFileItemFactory();
			ServletFileUpload upload = new ServletFileUpload(factory);
			List<FileItem> itens = null;
			try {
				itens = (List<FileItem>) upload.parseRequest(request);
				System.out.println("tam: "+itens.size());
			} catch (FileUploadException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			SessionFactory sf = (new AnnotationConfiguration().configure("/cfg/hibernate.cfg.xml")
					.buildSessionFactory());
			Session sessao = sf.openSession();
			Transaction tx = null;
			try {
				tx = sessao.beginTransaction();
				for(FileItem item : itens){
					System.out.println(item.isFormField());
					if(item.isFormField()){
						System.out.println("Desc: "+item.getString());
						ar.setDesc(item.getString());
					} else {
						System.out.println("Tam: "+item.get());
						ar.setArquivo(item.get());	
					}
				}
				sessao.save(ar);
				tx.commit();
				
			} catch (HibernateException e) {
				tx.rollback();
				System.out.println("Erro: "+e.getMessage());
				e.printStackTrace();
			} finally {
				sessao.close();
			}
			System.out.println("Enviando a arquivo com sucesso");
		}
	}

@Entity
public class Arquivos {
	@Id
	@GeneratedValue
	private int id;
	@Column(name="descricao")
	private String desc;
	@Column(name="arquivo")
	private byte[] arquivo;
	//Getters e Setters