Question

Continue solving this situation, I’ve updated hibernate ond sqljdbc4 jars and the exception is changed now (please take a look bellow).

I’m using

• Hibernate v4.1.4 FINAL
• JSF 2.1 (mojarra)
• all my @ManagedBeans implements Serializable

It has some relation to @ViewScoped, because @SessionScoped beans are OK

What I’ve tried:

• enable <Manager pathname=""/> in context.xml, and yes, the exception disappears, but I really lose persistent sessions, so I have to login again after tomcat server restart.

• make changes in hiberanate.cfg.xml file (e.g. add name="java:hibernate/SessionFactory" to <session-factory> tag), but without success

• play with SESSIONS.ser file, which is created after STOP the tomcat server.

  • When I open ser file, I can find there something like: …. uuidq ~ xppt $e8906373-f31b-4990-833c-c7680b2a77ce …
  • if i START tomcat server again, it reports Could not find a SessionFactory [uuid=8906373-f31b-4990-833c-c7680b2a77ce,name=null] – WHY??? The session seems to be present in SESSION.ser file…

My session manager:

@SessionScoped
@ManagedBean(name="userManager")
public class UserManager implements Serializable {
  private static final long serialVersionUID = 1L;
  private transient HttpSession session;
  private String username;
  private String password;
  private User user;

  public String login() {
    // here is seraching for user in database (based on username and password)

    if (user != null) {
      FacesContext context = FacesContext.getCurrentInstance();
      session = (HttpSession) context.getExternalContext().getSession(true);
      session.setAttribute("id", user.getId());
      session.setAttribute("username", user.getName());
      ...
      return "success";
    } 
  }

  public String logout() {
    user = null;
    FacesContext context = FacesContext.getCurrentInstance();
    session = (HttpSession) context.getExternalContext().getSession(true);
    ...     
    session.invalidate();
    return "success";
  }
  // getters and setters ----------------------------------------------------
}

my hibernate.cfg.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC 
  "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
  "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
 <session-factory>
  <property name="connection.url">jdbc:sqlserver://localhost;databaseName=RXP</property>
  <property name="connection.username">user</property>
  <property name="connection.password">password</property>
  <property name="connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
  <property name="dialect">org.hibernate.dialect.SQLServer2008Dialect</property>
  <property name="current_session_context_class">thread</property>
  <property name="hibernate.show_sql">true</property>
  <property name="hibernate.hbm2ddl.auto">update</property>

  <mapping class="tables.User"/>

 </session-factory>
</hibernate-configuration>

and my session factory:

public final class DaoSF implements Serializable {
  private static final long serialVersionUID = 1L;

  private static SessionFactory sessionFactory;
  private static ServiceRegistry serviceRegistry;

  public static SessionFactory getSessionFactory() {
    try {
      Configuration configuration = new Configuration();
      configuration.configure("hibernate.cfg.xml");
      serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();        
      sessionFactory = configuration.buildSessionFactory(serviceRegistry);
      return sessionFactory;
    }
    catch (HibernateException he) { 
      ...
    }
  }
}

exception:

30.6.2012 13:29:07 org.apache.catalina.session.StandardManager doLoad
SEVERE: IOException while loading persisted sessions: java.io.InvalidObjectException: Could not find a SessionFactory [uuid=f9c33312-cf7f-4f65-ae5f-44261705c18e,name=null]
java.io.InvalidObjectException: Could not find a SessionFactory [uuid=f9c33312-cf7f-4f65-ae5f-44261705c18e,name=null]
    at org.hibernate.internal.SessionFactoryImpl.locateSessionFactoryOnDeserialization(SessionFactoryImpl.java:2007)
    at org.hibernate.internal.SessionFactoryImpl.deserialize(SessionFactoryImpl.java:2037)
....

I’ve tried to edit my hibernate.cfg.xml file this way:

<session-factory name="java:hibernate/SessionFactory">

And the error reportd has been changed to:

30.6.2012 13:38:23 org.apache.catalina.session.StandardManager startInternal
SEVERE: Exception loading sessions from persistent storage
java.lang.NullPointerException
    at java.util.concurrent.ConcurrentHashMap.get(Unknown Source)
    at org.hibernate.internal.SessionFactoryRegistry.getSessionFactory(SessionFactoryRegistry.java:140)
    at org.hibernate.internal.SessionFactoryRegistry.getNamedSessionFactory(SessionFactoryRegistry.java:135)
    at org.hibernate.internal.SessionFactoryImpl.locateSessionFactoryOnDeserialization(SessionFactoryImpl.java:2000)
    at org.hibernate.internal.SessionFactoryImpl.deserialize(SessionFactoryImpl.java:2037)
....

Don’t you ever met with this error reports?

Answer 1

You don’t want instances of Session, SessionFactory or DaoSF to be serialized. They are transient and cannot be restored from a file. You better figure out where and why they are serialized to a file in the first place. That’s where you need to make a fix.