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Hibernate version:
Hibernate 2.1.1

Mapping documents:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping package="mypetstore.model.businessobject">
<class name="Order" table="ORDERS">
<id name="orderId" column="ORDERID" unsaved-value="null">
<generator class="assigned"/>
</id>

<property name="username"
column="USERID"
not-null="true"/>

<property name="orderDate"
column="ORDERDATE"
type="date"
not-null="true"/>

<property name="shipAddress1"
column="SHIPADDR1"
not-null="true"/>

<property name="shipAddress2"
column="SHIPADDR2"/>

<property name="shipCity"
column="SHIPCITY"
not-null="true"/>

<property name="shipState"
column="SHIPSTATE"
not-null="true"/>

<property name="shipZip"
column="SHIPZIP"
not-null="true"/>

<property name="shipCountry"
column="SHIPCOUNTRY"
not-null="true"/>

<property name="billAddress1"
column="BILLADDR1"
not-null="true"/>

<property name="billAddress2"
column="BILLADDR2"/>

<property name="billCity"
column="BILLCITY"
not-null="true"/>

<property name="billState"
column="BILLSTATE"
not-null="true"/>

<property name="billZip"
column="BILLZIP"
not-null="true"/>

<property name="billCountry"
column="BILLCOUNTRY"
not-null="true"/>

<property name="courier"
column="COURIER"
not-null="true"/>

<property name="totalPrice"
column="TOTALPRICE"
not-null="true"/>

<property name="billToFirstName"
column="BILLTOFIRSTNAME"
not-null="true"/>

<property name="billToLastName"
column="BILLTOLASTNAME"
not-null="true"/>

<property name="shipToFirstName"
column="SHIPTOFIRSTNAME"
not-null="true"/>

<property name="shipToLastName"
column="SHIPTOLASTNAME"
not-null="true"/>

<property name="creditCard"
column="CREDITCARD"
not-null="true"/>

<property name="expiryDate"
column="EXPRDATE"
not-null="true"/>

<property name="locale"
column="LOCALE"
not-null="true"/>

<set name="lineItems" cascade="all" inverse="true">
<key column="ORDERID"/>
<one-to-many class="LineItem"/>
</set>
</class>
</hibernate-mapping>



<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping package="mypetstore.model.businessobject">
<class name="LineItem" table="LINEITEM">
<id name="lineNumber" column="LINENUM" unsaved-value="null">
<generator class="assigned"/>
</id>

<property name="itemId"
column="ITEMID"
not-null="true"/>

<property name="quantity"
column="QUANTITY"
not-null="true"/>

<property name="unitPrice"
column="UNITPRICE"
not-null="true"/>

<many-to-one name="orderId" class="Order" column="ORDERID"/>

</class>
</hibernate-mapping>



Code between sessionFactory.openSession() and session.close():
I am using Spring.
Here's my app code and classes the saveOrder method is the code that generates the execption:

/*
* MyPetStore Project.
*/
package mypetstore.model.dao.hibernate;

import org.springframework.orm.hibernate.support.HibernateDaoSupport;

import mypetstore.model.dao.OrderDao;
import mypetstore.model.businessobject.Order;
import mypetstore.model.dao.helper.Sequence;

/**
* The Hibernate implementation of the <code>OrderDao</code>
*
* @author <a href="mailto:derek@derekshen.com">Derek Y. Shen</a>
* @see OrderDao
*/
public class OrderDaoHibernateImpl extends HibernateDaoSupport implements OrderDao {
private static final String ORDER_SEQUENCE_NAME = "orderSeq";

public void saveOrder(Order order) {
order.setOrderId(this.getSeqNum(ORDER_SEQUENCE_NAME));
this.getHibernateTemplate().save(order);
}

public Order getOrder(String orderId) {
return (Order)this.getHibernateTemplate().load(Order.class, orderId);
}

private int getSeqNum(String name) {
int seqNum = -1;
Sequence seq = (Sequence)this.getHibernateTemplate().load(Sequence.class, name);
seqNum = seq.getSeqnum();
seq.increment();
this.getHibernateTemplate().update(seq);
return seqNum;
}
}



/*
* MyPetStore Project.
*/
package mypetstore.model.businessobject;

import java.util.Set;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Date;

/**
* Order business object.
*
* @author <a href="mailto:derek@derekshen.com">Derek Y. Shen</a>
*/
public class Order {
private int orderId;
private String username;
private Date orderDate;
private String shipAddress1;
private String shipAddress2;
private String shipCity;
private String shipState;
private String shipZip;
private String shipCountry;
private String billAddress1;
private String billAddress2;
private String billCity;
private String billState;
private String billZip;
private String billCountry;
private String courier;
private double totalPrice;
private String billToFirstName;
private String billToLastName;
private String billEmail;
private String billPhone;
private String shipToFirstName;
private String shipToLastName;
private String shipEmail;
private String shipPhone;
private String creditCard;
private String expiryDate;
private String cardType;
private String locale;
private String status;
private Set lineItems;

public Order() {
this.lineItems = new HashSet();
}

public int getOrderId() {
return orderId;
}

public void setOrderId(int newOrderId) {
this.orderId = newOrderId;
}

public String getUsername() {
return username;
}

public void setUsername(String newUsername) {
this.username = newUsername;
}

public Date getOrderDate() {
return orderDate;
}

public void setOrderDate(Date newOrderDate) {
this.orderDate = newOrderDate;
}

public String getShipAddress1() {
return shipAddress1;
}

public void setShipAddress1(String newShipAddress1) {
this.shipAddress1 = newShipAddress1;
}

public String getShipAddress2() {
return shipAddress2;
}

public void setShipAddress2(String shipAddress2) {
this.shipAddress2 = shipAddress2;
}

public String getShipCity() {
return shipCity;
}

public void setShipCity(String newShipCity) {
this.shipCity = newShipCity;
}

public String getShipState() {
return shipState;
}

public void setShipState(String newShipState) {
this.shipState = newShipState;
}

public String getShipZip() {
return shipZip;
}

public void setShipZip(String newShipZip) {
this.shipZip = newShipZip;
}

public String getShipCountry() {
return shipCountry;
}

public void setShipCountry(String newShipCountry) {
this.shipCountry = newShipCountry;
}

public String getBillAddress1() {
return billAddress1;
}

public void setBillAddress1(String newBillAddress1) {
this.billAddress1 = newBillAddress1;
}

public String getBillAddress2() {
return billAddress2;
}

public void setBillAddress2(String newBillAddress2) {
this.billAddress2 = newBillAddress2;
}

public String getBillCity() {
return billCity;
}

public void setBillCity(String newBillCity) {
this.billCity = newBillCity;
}

public String getBillState() {
return billState;
}

public void setBillState(String newBillState) {
this.billState = newBillState;
}

public String getBillZip() {
return billZip;
}

public void setBillZip(String newBillZip) {
this.billZip = newBillZip;
}

public String getBillCountry() {
return billCountry;
}

public void setBillCountry(String newBillCountry) {
this.billCountry = newBillCountry;
}

public String getCourier() {
return courier;
}

public void setCourier(String newCourier) {
this.courier = newCourier;
}

public double getTotalPrice() {
return totalPrice;
}

public void setTotalPrice(double newTotalPrice) {
this.totalPrice = newTotalPrice;
}

public String getBillToFirstName() {
return billToFirstName;
}

public void setBillToFirstName(String newBillToFirstName) {
this.billToFirstName = newBillToFirstName;
}

public String getBillToLastName() {
return billToLastName;
}

public void setBillToLastName(String newBillToLastName) {
this.billToLastName = newBillToLastName;
}

public String getBillEmail() {
return this.billEmail;
}

public void setBillEmail(String newBillEmail) {
this.billEmail = newBillEmail;
}

public String getBillPhone() {
return this.billPhone;
}

public void setBillPhone(String newBillPhone) {
this.billPhone = newBillPhone;
}

public String getShipToFirstName() {
return shipToFirstName;
}

public void setShipToFirstName(String newShipToFirstName) {
this.shipToFirstName = newShipToFirstName;
}

public String getShipToLastName() {
return shipToLastName;
}

public void setShipToLastName(String newShipToLastName) {
this.shipToLastName = newShipToLastName;
}

public String getShipEmail() {
return this.shipEmail;
}

public void setShipEmail(String newShipEmail) {
this.shipEmail = newShipEmail;
}

public String getShipPhone() {
return this.shipPhone;
}

public void setShipPhone(String newShipPhone) {
this.shipPhone = newShipPhone;
}

public String getCreditCard() {
return creditCard;
}

public void setCreditCard(String newCreditCard) {
this.creditCard = newCreditCard;
}

public String getExpiryDate() {
return expiryDate;
}

public void setExpiryDate(String newExpiryDate) {
this.expiryDate = newExpiryDate;
}

public String getCardType() {
return cardType;
}

public void setCardType(String newCardType) {
this.cardType = newCardType;
}

public String getLocale() {
return locale;
}

public void setLocale(String newLocale) {
this.locale = newLocale;
}

public String getStatus() {
return status;
}

public void setStatus(String newStatus) {
this.status = newStatus;
}

public void setLineItems(Set newLineItems) {
this.lineItems = newLineItems;
}

public Set getLineItems() {
return lineItems;
}

public void addLineItem(LineItem lineItem) {
this.lineItems.add(lineItem);
}

/**
* Initialize the current order object based on the information
* inside an account and a shopping cart.
*
* @param account the user account
* @param cart the shopping cart
*/
public void init(Account account, Cart cart) {
this.username = account.getUsername();
this.orderDate = new Date();
this.shipAddress1 = account.getAddress1();
this.shipAddress2 = account.getAddress2();
this.shipCity = account.getCity();
this.shipState = account.getState();
this.shipZip = account.getZip();
this.shipCountry = account.getCountry();
this.billAddress1 = account.getAddress1();
this.billAddress2 = account.getAddress2();
this.billCity = account.getCity();
this.billState = account.getState();
this.billZip = account.getZip();
this.billCountry = account.getCountry();
//hardcode for now
this.courier = "FEDEX";
this.billToFirstName = account.getFirstName();
this.billToLastName = account.getLastName();
this.billEmail = account.getEmail();
this.billPhone = account.getPhone();
this.shipToFirstName = account.getFirstName();
this.shipToLastName = account.getLastName();
this.shipEmail = account.getEmail();
this.shipPhone = account.getPhone();
this.creditCard = account.getCreditCard();
this.expiryDate = account.getExpiryDate();
this.cardType = account.getCardType();
this.locale = account.getLanguagePreference();
//hardcode for now
this.status = "new";

this.totalPrice = cart.getSubTotal();
Iterator ite = cart.getCartItemList().iterator();
int i=1;
while (ite.hasNext()) {
CartItem ci = (CartItem)ite.next();
LineItem item = new LineItem();
item.setLineNumber(i);
item.setItemId(ci.getItem().getItemId());
item.setQuantity(ci.getQuantity());
item.setUnitPrice(ci.getItem().getUnitCost());
this.addLineItem(item);
i++;
}
}
}

/*
* MyPetStore Project.
*/
package mypetstore.model.businessobject;

import java.io.Serializable;

/**
* LineItem business object.
*
* @author <a href="mailto:derek@derekshen.com">Derek Y. Shen</a>
*/
public class LineItem implements Serializable {
private int orderId;
private int lineNumber;
private int quantity;
private String itemId;
private double unitPrice;

public LineItem() {
}

public int getOrderId() {
return orderId;
}

public void setOrderId(int newOrderId) {
this.orderId = newOrderId;
}

public int getLineNumber() {
return lineNumber;
}

public void setLineNumber(int newLineNumber) {
this.lineNumber = newLineNumber;
}

public String getItemId() {
return itemId;
}

public void setItemId(String newItemId) {
this.itemId = newItemId;
}

public double getUnitPrice() {
return unitPrice;
}

public void setUnitPrice(double newUnitprice) {
this.unitPrice = newUnitprice;
}

public int getQuantity() {
return quantity;
}

public void setQuantity(int newQuantity) {
this.quantity = newQuantity;
}

public double getTotalPrice() {
return this.unitPrice * this.quantity;
}

public boolean equals(Object obj) {
if (obj != null) {
if (obj instanceof LineItem) {
return this.orderId == ((LineItem)obj).orderId &&
this.lineNumber == ((LineItem)obj).lineNumber;
}
}

return false;
}

public int hashCode() {
return this.orderId + this.lineNumber;
}
}








Full stack trace of any exception that occurs:
11:13:56,357 DEBUG SecurityFilter:55 - doFilter
11:13:56,357 DEBUG SecurityFilter:59 - url = /createOrder.jsf
11:13:56,357 DEBUG SecurityFilter:60 - query = null
11:13:56,357 DEBUG SecurityFilter:72 - authorization succeeded
11:13:56,388 DEBUG OrderBean:28 - Creating order bean
11:13:56,388 DEBUG OrderBean:46 - Order bean is created
11:13:56,404 DEBUG OrderBean:36 - service locator is set
11:13:56,404 DEBUG OrderBean:55 - createOrderAction is invoked
11:13:56,419 DEBUG SessionImpl:528 - opened session
11:13:56,419 DEBUG JDBCTransaction:37 - begin
11:13:56,419 DEBUG JDBCTransaction:41 - current autocommit status:true
11:13:56,419 DEBUG JDBCTransaction:43 - disabling autocommit
11:13:56,419 DEBUG SessionImpl:1913 - loading [mypetstore.model.dao.helper.Sequence#orderSeq]
11:13:56,419 DEBUG SessionImpl:2010 - attempting to resolve [mypetstore.model.dao.helper.Sequence#orderSeq]
11:13:56,419 DEBUG SessionImpl:2043 - object not resolved in any cache [mypetstore.model.dao.helper.Sequence#orderSeq]
11:13:56,419 DEBUG EntityPersister:417 - Materializing entity: [mypetstore.model.dao.helper.Sequence#orderSeq]
11:13:56,419 DEBUG BatcherImpl:192 - about to open: 0 open PreparedStatements, 0 open ResultSets
11:13:56,419 DEBUG SQL:223 - select sequence0_.NAME as NAME0_, sequence0_.SEQNUM as SEQNUM0_ from SEQUENCE sequence0_ where sequence0_.NAME=?
11:13:56,435 DEBUG BatcherImpl:227 - preparing statement
11:13:56,450 DEBUG StringType:46 - binding 'orderSeq' to parameter: 1
11:13:56,450 DEBUG Loader:196 - processing result set
11:13:56,450 DEBUG Loader:404 - result row: orderSeq
11:13:56,450 DEBUG Loader:535 - Initializing object from ResultSet: orderSeq
11:13:56,450 DEBUG Loader:604 - Hydrating entity: mypetstore.model.dao.helper.Sequence#orderSeq
11:13:56,450 DEBUG IntegerType:68 - returning '1000' as column: SEQNUM0_
11:13:56,450 DEBUG Loader:225 - done processing result set (1 rows)
11:13:56,450 DEBUG BatcherImpl:199 - done closing: 0 open PreparedStatements, 0 open ResultSets
11:13:56,466 DEBUG BatcherImpl:240 - closing statement
11:13:56,466 DEBUG Loader:238 - total objects hydrated: 1
11:13:56,466 DEBUG SessionImpl:2129 - resolving associations for [mypetstore.model.dao.helper.Sequence#orderSeq]
11:13:56,466 DEBUG SessionImpl:2153 - done materializing entity [mypetstore.model.dao.helper.Sequence#orderSeq]
11:13:56,466 DEBUG SessionImpl:3000 - initializing non-lazy collections
11:13:56,466 DEBUG SessionImpl:1275 - object already associated with session
11:13:56,482 DEBUG SessionImpl:786 - saving [mypetstore.model.businessobject.Order#1000]
11:13:56,497 DEBUG Cascades:497 - processing cascades for: mypetstore.model.businessobject.Order
11:13:56,497 DEBUG Cascades:506 - done processing cascades for: mypetstore.model.businessobject.Order
11:13:56,497 DEBUG Cascades:497 - processing cascades for: mypetstore.model.businessobject.Order
11:13:56,497 DEBUG Cascades:524 - cascading to collection: mypetstore.model.businessobject.Order.lineItems
11:13:56,497 DEBUG Cascades:113 - cascading to saveOrUpdate()
11:13:56,497 DEBUG Cascades:341 - id unsaved-value strategy NULL
11:13:56,497 DEBUG SessionImpl:1326 - saveOrUpdate() previously saved instance with id: 1
11:13:56,497 DEBUG SessionImpl:1374 - updating [mypetstore.model.businessobject.LineItem#1]
11:13:56,497 DEBUG Cascades:506 - done processing cascades for: mypetstore.model.businessobject.Order
11:13:56,497 INFO HibernateTransactionManager:315 - Initiating transaction commit
11:13:56,497 DEBUG JDBCTransaction:59 - commit
11:13:56,513 DEBUG SessionImpl:2193 - flushing session
11:13:56,513 DEBUG Cascades:497 - processing cascades for: mypetstore.model.businessobject.Order
11:13:56,513 DEBUG Cascades:524 - cascading to collection: mypetstore.model.businessobject.Order.lineItems
11:13:56,513 DEBUG Cascades:113 - cascading to saveOrUpdate()
11:13:56,513 DEBUG SessionImpl:1306 - saveOrUpdate() persistent instance
11:13:56,513 DEBUG Cascades:506 - done processing cascades for: mypetstore.model.businessobject.Order
11:13:56,529 DEBUG SessionImpl:2321 - Flushing entities and processing referenced collections
11:13:56,529 DEBUG AbstractEntityPersister:278 - mypetstore.model.dao.helper.Sequence.seqnum is dirty
11:13:56,529 DEBUG SessionImpl:2415 - Updating entity: [mypetstore.model.dao.helper.Sequence#orderSeq]
11:13:56,529 DEBUG WrapVisitor:76 - Wrapped collection in role: mypetstore.model.businessobject.Order.lineItems
11:13:56,529 DEBUG SessionImpl:2768 - Collection found: [mypetstore.model.businessobject.Order.lineItems#1000], was: [<unreferenced>]
11:13:56,529 DEBUG SessionImpl:2415 - Updating entity: [mypetstore.model.businessobject.LineItem#1]
11:13:56,529 DEBUG SessionImpl:2664 - Processing unreferenced collections
11:13:56,544 DEBUG SessionImpl:2678 - Scheduling collection removes/(re)creates/updates
11:13:56,544 DEBUG SessionImpl:2217 - Flushed: 1 insertions, 2 updates, 0 deletions to 3 objects
11:13:56,544 DEBUG SessionImpl:2222 - Flushed: 1 (re)creations, 0 updates, 0 removals to 1 collections
11:13:56,544 DEBUG Printer:75 - listing entities:
11:13:56,560 ERROR BasicPropertyAccessor:106 - IllegalArgumentException in class: mypetstore.model.businessobject.Order, getter method of property: orderId
11:13:56,560 DEBUG JDBCTransaction:82 - rollback
11:13:56,560 DEBUG SessionImpl:558 - transaction completion
11:13:56,560 DEBUG JDBCTransaction:103 - re-enabling autocommit
11:13:56,560 DEBUG SessionImpl:546 - closing session
11:13:56,560 DEBUG SessionImpl:3187 - disconnecting session
11:13:56,560 DEBUG SessionImpl:558 - transaction completion
11:13:56,560 ERROR InvokeApplicationPhase:80 - #{orderBean.createOrderAction}: javax.faces.el.EvaluationException: org.springframework.orm.hibernate.HibernateSystemException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId; nested exception is net.sf.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId
javax.faces.FacesException: #{orderBean.createOrderAction}: javax.faces.el.EvaluationException: org.springframework.orm.hibernate.HibernateSystemException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId; nested exception is net.sf.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:78)
at javax.faces.component.UICommand.broadcast(UICommand.java:312)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:266)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:380)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:75)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at mypetstore.view.util.SecurityFilter.doFilter(SecurityFilter.java:73)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:825)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:738)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:526)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Caused by: javax.faces.el.EvaluationException: org.springframework.orm.hibernate.HibernateSystemException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId; nested exception is net.sf.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:130)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:72)
... 24 more
Caused by: org.springframework.orm.hibernate.HibernateSystemException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId; nested exception is net.sf.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId
at org.springframework.orm.hibernate.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:304)
at org.springframework.orm.hibernate.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:503)
at org.springframework.orm.hibernate.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:398)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:316)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:189)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:138)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:148)
at $Proxy2.saveOrder(Unknown Source)
at mypetstore.view.bean.OrderBean.createOrderAction(OrderBean.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:126)
... 25 more
Caused by: net.sf.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId
at net.sf.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:110)
at net.sf.hibernate.persister.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:310)
at net.sf.hibernate.proxy.HibernateProxyHelper.getIdentifier(HibernateProxyHelper.java:50)
at net.sf.hibernate.type.EntityType.toString(EntityType.java:84)
at net.sf.hibernate.impl.Printer.toString(Printer.java:49)
at net.sf.hibernate.impl.Printer.toString(Printer.java:82)
at net.sf.hibernate.impl.SessionImpl.flushEverything(SessionImpl.java:2228)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2186)
at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61)
at org.springframework.orm.hibernate.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:386)
... 36 more
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at net.sf.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:96)
... 45 more
11:13:56,622 ERROR StandardWrapper[/mypetstore:Faces Servlet]:269 - Servlet.service() for servlet Faces Servlet threw exception
javax.faces.FacesException: #{orderBean.createOrderAction}: javax.faces.el.EvaluationException: org.springframework.orm.hibernate.HibernateSystemException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId; nested exception is net.sf.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:78)
at javax.faces.component.UICommand.broadcast(UICommand.java:312)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:266)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:380)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:75)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at mypetstore.view.util.SecurityFilter.doFilter(SecurityFilter.java:73)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:825)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:738)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:526)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Caused by: javax.faces.el.EvaluationException: org.springframework.orm.hibernate.HibernateSystemException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId; nested exception is net.sf.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:130)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:72)
... 24 more
Caused by: org.springframework.orm.hibernate.HibernateSystemException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId; nested exception is net.sf.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId
at org.springframework.orm.hibernate.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:304)
at org.springframework.orm.hibernate.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:503)
at org.springframework.orm.hibernate.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:398)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:316)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:189)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:138)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:148)
at $Proxy2.saveOrder(Unknown Source)
at mypetstore.view.bean.OrderBean.createOrderAction(OrderBean.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:126)
... 25 more
Caused by: net.sf.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of mypetstore.model.businessobject.Order.orderId
at net.sf.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:110)
at net.sf.hibernate.persister.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:310)
at net.sf.hibernate.proxy.HibernateProxyHelper.getIdentifier(HibernateProxyHelper.java:50)
at net.sf.hibernate.type.EntityType.toString(EntityType.java:84)
at net.sf.hibernate.impl.Printer.toString(Printer.java:49)
at net.sf.hibernate.impl.Printer.toString(Printer.java:82)
at net.sf.hibernate.impl.SessionImpl.flushEverything(SessionImpl.java:2228)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2186)
at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61)
at org.springframework.orm.hibernate.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:386)
... 36 more
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at net.sf.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:96)
... 45 more



Name and version of the database you are using:
MySql 4.1.7

The generated SQL (show_sql=true):
This exception is prior to the generated SQL.

Debug level Hibernate log excerpt:
### Hibernate logging options
log4j.logger.net.sf.hibernate = debug