ERRO Open Sessio in View: Already have an associated managed connection

Assuntos Gerais
#1

E ai galera,

Eu implementei no meu projeto o padrão Open Session in View, mas algumas vezes quando vai iniciar a transação da um erro. Eu não sei oque é, pois ja tentei de tudo e cheguei ateh aqui, mas ta dando esse erro. To mandando meu ServletFilter e o erro.

public class OpenSessionInViewFilter implements Filter {

	private EntityManagerFactory emf;
	private EntityManager em;

	/**
	 * Default constructor.
	 */
	public OpenSessionInViewFilter() {
	}

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		em.close();
		emf.close();
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		try {
			if (em == null || !em.isOpen()) {
				em = emf.createEntityManager();
			}
			if (!em.isOpen() || em.getTransaction() == null || !em.getTransaction().isActive()) {
				em.getTransaction().begin();
			}
			Dao.setEmf(emf);
			Dao.setEm(em);
			chain.doFilter(request, response);
			if (emf != null && em != null && em.isOpen() && em.getTransaction() != null && em.getTransaction().isActive()) {
				em.getTransaction().commit();
				em.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
			if (emf != null && em != null && em.isOpen() && em.getTransaction() != null && em.getTransaction().isActive()) {
				em.getTransaction().rollback();
			}
		}
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		if (emf == null) {
			emf = Persistence.createEntityManagerFactory("CanilKrusemark");
		}
	}

}

Erro:

javax.persistence.PersistenceException: org.hibernate.TransactionException: Already have an associated managed connection
	at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1387)
	at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1310)
	at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:1397)
	at org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:62)
	at br.com.CanilKrusemark.servlet.OpenSessionInViewFilter.doFilter(OpenSessionInViewFilter.java:48)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: org.hibernate.TransactionException: Already have an associated managed connection
	at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:65)
	at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:160)
	at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1394)
	at org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:59)
	... 17 more

Me ajudem :?: :?: :?: :?: :?:

#2

pow galera, me da uma moral aee, to precisando

#3