1 Reply Latest reply on Nov 19, 2007 6:59 PM by Jon Loe

    valid hibernate session from Dao

    Jon Loe Newbie

      hi All...

      I'm using hibernate 3.2.2ga, jboss 4.0.5.ga, jdk 1.5. I'm trying to run a stored proc (and a query) within my daoImpl class but it's throwing an "unknown connection2" error. The full stack is below. Searching around jboss, I found this site....


      http://wiki.jboss.org/wiki/Wiki.jsp?page=IGetquotTryingToReturnAnUnknownConnection2quotError


      but it states it's only a hibernate 2 issue. The code is being executed within a callback. I also tried without the callback. My daoImpl extends org.springframework.orm.hibernate3.support.HibernateDaoSupport. below is the code and stack. any help would be appreciated..

      thanks in advance..jim

      public java.util.Set findVolunteers(final int transform, final java.lang.String queryString, int pageNumber, int pageSize, final java.lang.String firstName, final java.lang.String lastName, final java.lang.String phoneNumber, final java.lang.String status, final java.lang.Boolean requiresFollowUp)
       {
      
       org.springframework.orm.hibernate3.HibernateCallback callback = new org.springframework.orm.hibernate3.HibernateCallback()
       {
       final java.util.Set volunteers = new java.util.HashSet();
       java.sql.PreparedStatement stmt = null;
       java.sql.ResultSet rs = null;
       org.dcri.recruit.VolunteerSearchObject searchObject = null;
      
      
       public Object doInHibernate(org.hibernate.Session session)
       throws org.hibernate.HibernateException
       {
       try {
      
       // Get the connection from hibernate
       Connection conn = session.connection();
       stmt = conn.prepareStatement(query);
      
      
       rs = stmt.executeQuery();
      
       // Process the results
       while (rs.next())
       {
       .....
       }
       }
       catch (Exception e) {
       e.printStackTrace();
       throw new java.lang.RuntimeException("Could not execute Volunteer search", e);
       }
       finally {
       try {
       rs.close();
       session.close();
       }
       catch (Exception e) {
       e.printStackTrace();
       }
       try {
       stmt.close();
       }
       catch (Exception e) {
       e.printStackTrace();
       }
       }
      
       return volunteers;
       }
       };
       return (java.util.Set)this.getHibernateTemplate().execute(callback);
      


      and the stack trace...there's more if that'll help...

      java.lang.IllegalStateException: Trying to return an unknown connection2! org.jboss.resource.adapter.jdbc.WrappedConnect
      ion@798797
       at org.jboss.resource.connectionmanager.CachedConnectionManager.unregisterConnection(CachedConnectionManager.jav
      a:342)
       at org.jboss.resource.connectionmanager.TxConnectionManager$TxConnectionEventListener.connectionClosed(TxConnect
      ionManager.java:606)
       at org.jboss.resource.adapter.jdbc.BaseWrapperManagedConnection.closeHandle(BaseWrapperManagedConnection.java:26
      6)
       at org.jboss.resource.adapter.jdbc.WrappedConnection.close(WrappedConnection.java:129)
       at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.closeConnection(LocalDataSourceConnectio
      nProvider.java:95)java.lang.IllegalStateException: Trying to return an unknown connection2! org.jboss.resource.adapter.jdbc.WrappedConnect
      ion@798797
       at org.jboss.resource.connectionmanager.CachedConnectionManager.unregisterConnection(CachedConnectionManager.jav
      a:342)
       at org.jboss.resource.connectionmanager.TxConnectionManager$TxConnectionEventListener.connectionClosed(TxConnect
      ionManager.java:606)
       at org.jboss.resource.adapter.jdbc.BaseWrapperManagedConnection.closeHandle(BaseWrapperManagedConnection.java:26
      6)
       at org.jboss.resource.adapter.jdbc.WrappedConnection.close(WrappedConnection.java:129)
       at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.closeConnection(LocalDataSourceConnectio
      nProvider.java:95)