Trouble Shooting on Hibernate StaleObjectStateException

Trouble Shooting on Hibernate StaleObjectStateException

I am getting StaleObjectStateException on grails 1.3.7.
Stale Object State Exception
Error Message
2013-03-05 16:26:06,140 [http-bio-8080-exec-35] ERROR com.sillycat.xxx.ErrorController  - Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.sillycat.xxx.Device#3015]
org.codehaus.groovy.grails.web.errors.GrailsWrappedRuntimeException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.sillycat.xxx.Device#3015]
at Skipped non-sillycat elements.(:86)
Caused by: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.sillycat.xxx.Device#3015]
at Skipped non-sillycat elements.(:1)
at com.sillycat.xxxx.events.EventService.saveEvent(EventService.groovy:93)
at com.sillycat.xxx.events.GeoFenceEntryEventService.super$2$saveEvent(GeoFenceEntryEventService.groovy)
at Skipped non-sillycat elements.(:1)

Since the bottom of grails 1.3.7 is hibernate 3.3.1.GA. I begin to create the environment of Hibernate and I try to produce and solve that problem on Hibernate first.

1. Build the Hibernate environment
Packages Here is my pom.xml to fetch all the related packages
<dependency>
               <groupId>org.hibernate</groupId>
               <artifactId>hibernate-core</artifactId>
               <version>${hibernate.version}</version>
</dependency>
<dependency>
               <groupId>org.hibernate</groupId>
               <artifactId>hibernate-entitymanager</artifactId>
               <version>${hibernate.version}</version>
</dependency>
<dependency>
               <groupId>org.hibernate</groupId>
               <artifactId>hibernate-annotations</artifactId>
               <version>${hibernate.version}</version>
</dependency>
<dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>1.5.2</version>
            <scope>test</scope>
</dependency>
<dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.5.2</version>
            <scope>test</scope>
</dependency>
<dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.14</version>
            <scope>test</scope>
</dependency>
<dependency>
               <groupId>mysql</groupId>
               <artifactId>mysql-connector-java</artifactId>
               <version>5.1.23</version>
</dependency>

And the version of Hibernate I am using is <hibernate.version>3.3.1.GA</hibernate.version>

Hibernate Configuration - hibernate.cfg.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
     <session-factory>
          <!-- Database connection settings -->
          <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
          <property name="connection.url">jdbc:mysql://localhost/test</property>
          <property name="connection.username">root</property>
          <property name="connection.password">kaishi</property>

          <!-- JDBC connection pool (use the built-in) -->
          <property name="connection.pool_size">1</property>

          <!-- SQL dialect -->
          <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

          <!-- Enable Hibernate's automatic session context management -->
          <property name="current_session_context_class">thread</property>

          <!-- Disable the second-level cache -->
          <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

          <!-- Echo all executed SQL to stdout -->
          <property name="show_sql">true</property>

          <!-- Drop and re-create the database schema on startup -->
          <property name="hbm2ddl.auto">update</property>

          <!-- Mapping files -->
          <mapping resource="hbm/student.hbm.xml" />

     </session-factory>
</hibernate-configuration>

And the Object Configuration file for Hibernate
<?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="com.sillycat.easyhibernate.model.Student" table="students" optimistic-lock="all" dynamic-update="true">
     <class name="com.sillycat.easyhibernate.model.Student" table="students" optimistic-lock="none">
     -->
     <class name="com.sillycat.easyhibernate.model.Student" table="students" optimistic-lock="none">
          <id name="id" type="int" column="id">
               <generator class="native" />
          </id>
          <property name="firstName">
               <column name="first_name" />
          </property>
          <property name="lastName">
               <column name="last_name" />
          </property>
     </class>
</hibernate-mapping>

2. Reproduce the Exception with Java Codes
package com.sillycat.easyhibernate.temp;

import java.util.Date;

import org.hibernate.Session;

import com.sillycat.easyhibernate.model.Student;
import com.sillycat.easyhibernate.util.HibernateUtil;

public class MyRunnable implements Runnable {
     private String id;

     @Override
     public void run() {
          Session session = HibernateUtil.getSessionFactory().openSession();
          session.beginTransaction();
          Student student = (Student) session.load(Student.class, Integer.valueOf(id));
          student.setFirstName("xxx" + (new Date()).getTime());
          session.save(student);
          try {
               Thread.sleep(10000);
          } catch (InterruptedException e) {
               e.printStackTrace();
          }
          session.getTransaction().commit();
          System.out.println("Done " + student.getFirstName());
     }

     public MyRunnable(String id) {
          this.id = id;
     }

}

package com.sillycat.easyhibernate.temp;


public class StaleObjectStateExceptionMain {


publicstaticvoid main(String[] args) {
for(int i = 0;i< 2;i++){
Thread t = new Thread(new MyRunnable("1"));
    t.start();
}
}


}

If I am using the lock on hibernate configuration, the Exception will reproduce.
If I change it to none, it will work fine. So the most import part is as follow:
<class name="com.sillycat.easyhibernate.model.Student" table="students" optimistic-lock="all" dynamic-update="true">
<class name="com.sillycat.easyhibernate.model.Student" table="students" optimistic-lock="none">

References:
http://stackoverflow.com/questions/7664768/optimistic-locking-and-org-hibernate-staleobjectstateexception
http://www.grails.org/doc/1.3.7/guide/15.%20Grails%20and%20Hibernate.html
http://stackoverflow.com/questions/8081413/hibernate-program-errors


http://grails.org/doc/1.3.7/guide/single.html#5.5.2.7%20Optimistic%20Locking%20and%20Versioning