In my application I am loading some of the objects that are needed in that session and creating new object. During save we haven't seen insert statement. Finally during the transaction commit, I noticed that lazy collections of the retrieved objects are loaded though they were not accessed. What could be wrong?

Note: I am using 2.1 final and show_SQL is true.

The database operations are sent during the flush call (or commit as flush is implied). Not sure about your loading issue - it will depend on the mappings, what collection type you have mapped etc. No enough information.

Here is my Mapping & Class

=============
<!-- Folder Model definition -->
<class name="xxxx.bizcomponent.dms.model.Folder" table="folder" dynamic-update="true">
<id name="ObjectId" type="string" column="FolderId">

<generator class="assigned"/>
</id>
<property name="Name"/>
<property name="Title"/>
<property name="LockStatus" type="boolean"/>
<!-- Documents to Folder -->
<set name="ChildDocuments" table="Document" inverse="true" lazy="true">
<key column="FolderId"/>
<one-to-many class="xxxx.bizcomponent.dms.model.Document"/>
</set>
<!-- Folder Folder Relation -->
<set name="ChildFolders" table="folder" inverse="true" lazy="true">
<key column="ParentId"/>
<one-to-many class="xxxx.bizcomponent.dms.model.Folder"/>
</set>

<many-to-one name="ParentFolder" column="ParentId" class="xxxx.bizcomponent.dms.model.Folder" not-null="true"/ -->
</class>

===========


package xxxx.xxxx.dms.model;

import java.lang.*;
import java.util.*;
import java.sql.Date;
import zzz.bizcomponent.admin.model.* ;


/**
* @author
* @see
* @since
* @version
*/
public class Folder extends BaseModel
{
// variables for holding the Folder properties.



private static String NAME = "Name";
private static String TITLE = "Title" ;
private static String LOCKSTATUS = "LockStatus" ;
private static String CHILDDOCUMENTS = "childDocuments";
private static String CHILDFOLDERS = "childFolders";
private static String PARENT_FOLDER = "parentFolder";



/**
* Sets the name of the Folder
* @param title
* @return void
* @exception
* @author
*/
public void setName(String name)
{
setProperty(NAME, (Object)name);
}

/**
* Returns the Name of the Folder
* @return String
* @exception
* @author
*/
public String getName()
{
return (String)getProperty(NAME);
}



/**
* Sets the title of the Folder
* @param title
* @return void
* @exception
* @author
*/
public void setTitle(String title)
{
setProperty(TITLE, (Object)title);
}

/**
* Returns the Title of the Folder
* @return String
* @exception
* @author
*/
public String getTitle()
{
return (String)getProperty(TITLE);
}


/**
This method thes the Lock status of the folder
*/
public void setLockStatus(boolean status)
{
setProperty(LOCK_STATUS, status);

}

/**
This method returns the Lock Status of the Folder
*/
public boolean getLockStatus()
{
return getPropertyAsBoolean(LOCK_STATUS);
}




/**
Sets the document Objects
*/

public void setChildDocuments(Set childDocs)
{
if ( childDocs != null )
{
setProperty(CHILDDOCUMENTS, (Object)childDocs);
}
}

/**
Returns the document Objects
*/

public Set getChildDocuments()
{
Set dSet = (Set)getProperty((Object)CHILDDOCUMENTS);

return dSet;
}

/**
Sets the folder Objects
*/

public void setChildFolders(Set childFlds)
{
if ( childFlds != null )
{
setProperty(CHILDFOLDERS, (Object)childFlds);
}
}

/**
Returns the Folder Objects
*/

public Set getChildFolders()
{
Set fSet = (Set) getProperty((Object)CHILDFOLDERS);

return fSet;


}

/**
* Sets the Parent Folder of the Folder
* @param Folder folder
* @return void
*/
public void setParentFolder(Folder parentFolder)
{
setProperty(PARENT_FOLDER, parentFolder);
}

/**
* Returns the Parent Folder of the Folder
* @return Folder parent folder
* @exception
* @author
*/
public Folder getParentFolder()
{
return (Folder)getProperty(PARENT_FOLDER);
}



}
===========

During create new folder, parent folder is just loaded in the session and set as parent folder in child and not accessed any collection methods. But after commit, I noticed that lazy collection of parent Folder (Documents and ChildFolders) are initialized even though lazy is set to true.

(Note: All the Object properties are stored in Hashtable that is there in BaseModel)

Put the Hibernate src in your sourcepath, and use your debugger to find where your code causes the collections to be initialized.