Error performing load command

Raghda · **Joined:** Sun Feb 08, 2009 4:33 am **Posts:** 8

Hi everybody ,
I am new to hibernate
I am using eclipse ,Mysql and hibernate 3.2.3
I have a simple application to save and load from sql.
I have department class

Code:

package helper;

public class Department {

   private int id;
   private String name;
   
   public Department(String name){
      this.name=name;
   }
   public int getId() {
      return id;
   }
   public void setId(int id) {
      this.id = id;
   }
   public String getName() {
      return name;
   }
   public void setName(String name) {
      this.name = name;
   }
}

and here is the mapping file

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="helper">
<class name="helper.Department"
table="department_table">
<id name="id"
column="department_id"
type="int">
<generator class="native"/>
</id>

<property name="name"
column="department_name"
type="string"/>

</class>
</hibernate-mapping>

and here comes the problem ,when i run this code

SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
Session newSession = sessionFactory.openSession();
Transaction newTransaction = newSession.beginTransaction();
Query query=newSession.createQuery("from Department as dept order by dept.id asc");
Iterator iter =query.iterate();
if(iter.hasNext())deptVector=new Vector();
while ( iter.hasNext() ) {
Department dep = (Department) iter.next(); //here is the error
//deptVector.add(dep);
}

when i reach this line i get this error

INFO: Error performing load command
org.hibernate.HibernateException: Javassist Enhancement failed: helper.Department
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:142)
at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.getProxy(JavassistProxyFactory.java:72)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:402)
at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:3483)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:298)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:219)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:126)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:905)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:873)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:590)
at org.hibernate.type.EntityType.resolve(EntityType.java:412)
at org.hibernate.type.EntityType.nullSafeGet(EntityType.java:227)
at org.hibernate.impl.IteratorImpl.next(IteratorImpl.java:135)
at main.GetAllDepartmentsServlet.doGet(GetAllDepartmentsServlet.java:37)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.InstantiationException: helper.Department_$$_javassist_0
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:139)
... 29 more

any ideas please??
i even do not know what is javassit??

Thanks in advance

littypreethkr · **Posted:** Mon Feb 09, 2009 8:29 am

The problem is with your bean; its not having a no-argument constructor.

Raghda · **Joined:** Sun Feb 08, 2009 4:33 am **Posts:** 8

Hi Litty,

Thank you so much ,your answer solved my problem.

agwl.deepak · **Joined:** Thu Feb 04, 2010 2:30 pm **Posts:** 3

I am getting a similar error and don't know what to do.

09:54:35,679 INFO DefaultLoadEventListener:109 - Error performing load command
org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [com.bd.syndication.model.User#7]

Thanks,
Deepak.

Cameron McKenzie · **Posted:** Wed Feb 10, 2010 8:48 am

Check to see if a User with an id of 7 exists in your database. I'm guessing it doesn't.

stephaneeybert · **Joined:** Mon Apr 16, 2007 8:10 am **Posts:** 246

@Cameron

If it indeed doesn't exist in the database, what course of action to take ?

I'm trying to test that a record does not exist in a table after a delete.

Is this the way to go ?

Code:

      Integer addressId = user.getAddress().getId();
      userDao.makeTransient(user);
      Address loadedAddress = null;
      try {
         loadedAddress = addressDao.findById(addressId, false);
      } catch (ObjectNotFoundException e) {

      }