-->
These old forums are deprecated now and set to read-only. We are waiting for you on our new forums!
More modern, Discourse-based and with GitHub/Google/Twitter authentication built-in.

View unanswered posts | View active topics


Board index » Hibernate & Java Persistence » Hibernate Users

All times are UTC - 5 hours [ DST ]


Forum locked This topic is locked, you cannot edit posts or make further replies.  Page 1 of 1
  [ 2 posts ] 
  Previous topic | Next topic 
Author Message
ricardo.delarosa
 Post subject: NullPointerException at sessionFactory.openSession()
PostPosted: Tue May 19, 2009 12:19 pm 
Newbie

Joined: Tue May 19, 2009 11:47 am
Posts: 4
Hi !

I am using Hibernate in a java project.
I have the next method named "getExamenPorCodInterno":

Code:

public class AdminExamen {
     ...
     public Examen
     getExamenPorCodInterno(String codigoInternoExamen)
    {
       Examen examen = null ;
       SessionFactory sessionFactory  = null ;
        Session session = null ;
        Transaction tx = null ;
       
        try {
           
           sessionFactory  = HibernateUtil.getSessionFactory() ;
           session = sessionFactory.openSession();  /* line 161*/
                     
           tx = session.beginTransaction();
          
           Query getByDocId =
               session.createQuery("from Examen exa where exa.codInterno = :codInterno ");
          
           getByDocId.setString("codInterno", codigoInternoExamen );
            
           System.out.println("AdminExamen:getExamenPorCodInterno: ANTES de getByDocId.list()");
          
           List result = getByDocId.list();
   
           if ( result.size() > 0 ) {
               System.out.println("AdminExamen:getExamenPorCodInterno: ( result.size()>0 )");
               Object obj = result.get(0);
              
               System.out.println("AdminExamen:getExamenPorCodInterno: obj.getClass().getName() >>" + obj.getClass().getName() );
              
               examen  = (Examen) result.get(0);
          
   
           }
           else if ( result.size()== 0 ) {
               System.out.println("AdminExamen:getExamenPorCodInterno: ( result.size()==0 )");           
           }
          
           /*       
           session.save(empresa);
           */
          
           System.out.println("AdminExamen:getExamenPorCodInterno: ANTES de commit()");
          
          
           tx.commit();
          
          
        }
        catch(Exception exc) {
           
           if ( tx!=null ) {
              tx.rollback();
           }
           exc.printStackTrace();
        }
        finally {
           session.close();
        }
       
        return examen ;
    }
   ...
}


When this method executes an error appears, and the next exception is thrown:

Code:
java.lang.NullPointerException
    at org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge.nextTimestamp(RegionFactoryCacheProviderBridge.java:85)
    at org.hibernate.impl.SessionFactoryImpl.openSession(SessionFactoryImpl.java:526)
    at org.hibernate.impl.SessionFactoryImpl.openSession(SessionFactoryImpl.java:535)
    at framework.ordenservicio.empresas.AdminExamen.getExamenPorCodInterno(AdminExamen.java:161)
    at miappweb.DefinirValorDeExamenesDeMO.doPost(DefinirValorDeExamenesDeMO.java:111)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
    at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
    at java.lang.Thread.run(Thread.java:595)
java.lang.NullPointerException
    at framework.ordenservicio.empresas.AdminExamen.getExamenPorCodInterno(AdminExamen.java:207)
    at miappweb.DefinirValorDeExamenesDeMO.doPost(DefinirValorDeExamenesDeMO.java:111)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
    at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
    at java.lang.Thread.run(Thread.java:595)


My hibernate.cfg.xml file is:

Code:
<hibernate-configuration>

    <session-factory>

        <!-- Database connection settings -->
       
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <!-- property name="connection.driver_class">org.hsqldb.jdbcDriver</property -->       

        <property name="connection.url">jdbc:mysql://localhost:3306/oservicio</property>
        <!-- property name="connection.url">jdbc:hsqldb:hsql://localhost</property -->
                       
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
       
        <!-- property name="dialect">org.hibernate.dialect.HSQLDialect</property-->

        <!-- Enable Hibernate's automatic session context management -->

        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <!-- property name="hbm2ddl.auto">create</property -->

        <mapping resource="Categoria.hbm.xml"/>
        <mapping resource="Empresa.hbm.xml"/>
        <mapping resource="Examen.hbm.xml"/>       
        <mapping resource="OrdenServicio.hbm.xml"/>       
        <mapping resource="Paciente.hbm.xml"/>
        <mapping resource="Paquete.hbm.xml"/>       
        <mapping resource="Subcategoria.hbm.xml"/>       
        <mapping resource="InstanciaExamen.hbm.xml"/>       
        <mapping resource="TarifaExamenEmpresa.hbm.xml"/>
               
    </session-factory>
</hibernate-configuration>


Any help is very appreciated.

Ricardo De la Rosa
Top
 Profile  
 
ricardo.delarosa
 Post subject: Re: NullPointerException at sessionFactory.openSession()
PostPosted: Wed May 20, 2009 5:55 pm 
Newbie

Joined: Tue May 19, 2009 11:47 am
Posts: 4
The error was that in the last transaction before the invocation: sessionFactory.getCurrentSession() , the application executed sessionFactory.close().
I deleted this invocation and the error disappeared.
Top
 Profile  
 
Display posts from previous:  Sort by  
Forum locked This topic is locked, you cannot edit posts or make further replies.  Page 1 of 1
  [ 2 posts ] 

Board index » Hibernate & Java Persistence » Hibernate Users

All times are UTC - 5 hours [ DST ]

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
© Copyright 2014, Red Hat Inc. All rights reserved. JBoss and Hibernate are registered trademarks and servicemarks of Red Hat, Inc.