SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
java.lang.ExceptionInInitializerError
Caused by: org.hibernate.MappingException: Foreign key (FK185958CF49BEAA68:PRODUCT [SERIALNUMBER])) must have same number of columns as the referenced primary key (PRODUCT [SERIALNUMBER,idx])
at org.hibernate.mapping.ForeignKey.alignColumns(ForeignKey.java:112)
at org.hibernate.mapping.ForeignKey.alignColumns(ForeignKey.java:95)
at org.hibernate.cfg.Configuration.secondPassCompileForeignKeys(Configuration.java:1835)
at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1756)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1423)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1856)
at com.nd.util.HibernateUtil.<clinit>(HibernateUtil.java:17)
Exception in thread "main"

I am trying to get a simple map to persist but without success any help is appreciated.

The database is postgres. The associated file content is mentioned below

package com.nd.core.users.impl;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

public class Product {
private String serialNumber;
private String name;

private Map parts = new HashMap();

public String getName() { return name; }
public void setName(String name) { this.name = name; }
public Map getParts() { return parts; }
void setParts(Map parts) { this.parts = parts; }
public String getSerialNumber() { return serialNumber; }
void setSerialNumber(String sn) { serialNumber = sn; }
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Nov 7, 2011 11:19:23 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.nd.core.users.impl.Product" table="PRODUCT">
<id name="serialNumber" type="java.lang.String">
<column name="SERIALNUMBER" />
<generator class="assigned" />
</id>
<property name="name" type="java.lang.String">
<column name="NAME" />
</property>
<map name="parts" table="PRODUCT" lazy="true">
<key>
<column name="SERIALNUMBER" />
</key>
<map-key type="string"></map-key>
<element type="string">
<column name="PARTS" />
</element>
</map>
</class>
</hibernate-mapping>

It got resolved when I changed the table name to PRODUCT_