Hibernate fails to fetch the record in the Database

Question

Hi ,
We are developing a J2EE based server application which has to cater to different types of mobile clients.
The clients will be pinging the server at a rate of 4-5 requests per sec.
I use HibernateUtil.getSession().load(PK) and it returns null..but the record is very much there in the DB..i have not inserted that record using JDBC.
This happens at times..not always..
Exception : No row with the given identifier exists in the session..
If i destroy and recreate the session factory, it works fine..but it is an expensive operation.
DB : Mysql 5
Hibernate version 3
My 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>
<class name="client.Contacts" table="contacts">
<id name="cId" column="c_Id" unsaved-value="null">
               <generator class="identity" />               
          </id>
<property name="ContactID">
<column name="ContactID" />
</property>
<property name="firstName">
<column name="FirstName" />
</property>
<property name="lastName">
<column name="LastName" />
</property>
<property name="address">
<column name="address" />
</property>
<property name="email">
<column name="Email" />
</property>
<property name="url">
<column name="url" />
</property>
<property name="birthday">
<column name="birthday" />
</property>
<property name="note">
<column name="note" />
</property>
<property name="telephone">
<column name="telephone" />
</property>
<property name="telephoneFax">
<column name="telephoneFax" />
</property>
<property name="telephoneHome">
<column name="telephoneHome" />
</property>
<property name="telephoneWork">
<column name="telephoneWork" />
</property>
<property name="telephoneCell">
<column name="telephoneCell" />
</property>
<property name="nickName">
<column name="nickName" />
</property>
<property name="version">
<column name="version" />
</property>
<property name="userPhoneFK">
<column name="userPhoneFK" />
</property>
<property name="isDeleted">
<column name="isDeleted"/>
</property>
<property name="userModifiedFlag">
<column name="isModifiedbyUser"/>
</property>
<property name="isRestored">
<column name="isRestored"/>
</property>
<property name="lastBackUpTime">
               <column name="lastBackUpTime" />
               </property>
               <property name="isAddedOnServer">
                    <column name="isAddedOnServer" />
               </property>
</class>
</hibernate-mapping>
Java code :
String sortContactsQuery = " from Contacts c where c.isRestored= 'false' and isDeleted='false' and c.userPhoneFK="+msisdnID+" order by c.ContactID ASC ";
contactList= getSession().createQuery(sortContactsQuery).list();
contactList = criteria.list();
This list is empty even though there are records.
Thanks in advance.
Ven

Answer 1

Sorry but you have posted your question in the wrong forum. Your question isn't related to neither Patterns nor OO Design.