I am trying to deploy & test one cmp entity bean in JBOSS. It seems the ejb is deployed properly & successfully. But while running the client it's giving transaction rollback exception.
Could anyone please help me in solving this problem?

Thanks in advance for your help..

=====================================================
My codes are as follows
=====================================================

+++++++++++++++++++ HOME Interface ++++++++++++++++++

package org.jboss.docs.testJboss.interfaces;

import javax.ejb.EJBHome;
import javax.ejb.CreateException;
import javax.ejb.FinderException;
import java.rmi.RemoteException;
import java.util.Collection;

public interface TestHome
extends EJBHome
{
public Test create(final int id, final String name)
throws CreateException, RemoteException;
public Test findByPrimaryKey(final int id)
throws FinderException, RemoteException;

}

+++++++++++++++++++ REMOTE Interface ++++++++++++++++++

package org.jboss.docs.testJboss.interfaces;

import javax.ejb.EJBObject;
import java.rmi.RemoteException;

public interface Test
extends EJBObject
{

public void add() throws RemoteException;

public int getId() throws RemoteException;
public void setId(int id) throws RemoteException;

public String getName() throws RemoteException;;
public void setName(String name) throws
RemoteException;
}

+++++++++++++++++++ BEAN +++++++++++++++++++++++++++

package org.jboss.docs.testJboss.bean;

import org.jboss.docs.testJboss.interfaces.*;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;

/**
* Entity Bean representing a Class. A Class have a Teacher and a number of
* Students
*/

public class TestBean
implements EntityBean
{
EntityContext ctx;

private int id;
private String name;

/**
* Create an instance of a Class.
*/
public int ejbCreate (final int id, final String name)
{
this.id = id;
this.name = name;
return 0;
}

public void ejbPostCreate(final int id, final String name) { }

public int getId()
{
return id;
}
public void setId( int newId)
{
id = newId;
}

public String getName()
{
return name;
}
public void setName( String newName)
{
name = newName;
}

public void add()
{
setId( id );
setName( name );
}

public void setEntityContext(EntityContext ctx) { this.ctx = ctx; }

public void unsetEntityContext() { ctx = null; }

public void ejbActivate() {}

public void ejbPassivate()
{

}

public void ejbLoad()
{

}

public void ejbStore() { }
public void ejbRemove() { }

}

++++++++++++++++ jaws.xml +++++++++++++++++++++++


SQLServerPool
<type-mapping>SQLServerPool</type-mapping>

<enterprise-beans>

<ejb-name>TestBean</ejb-name>
<table-name>TEST</table-name>
<remove-table>true</remove-table>
<cmp-field>
<field-name>id</field-name>
<column-name>ID</column-name>
</cmp-field>
<cmp-field>
<field-name>name</field-name>
<column-name>NAME</column-name>
<jdbc-type>VARCHAR</jdbc-type>
<sql-type>VARCHAR(100)</sql-type>
</cmp-field>


findByPrimaryKey


<read-ahead>true</read-ahead>



</enterprise-beans>


++++++++++++++++++++++++ JBOSS.xml +++++++++++++++
<?xml version="1.0" encoding="Cp1252"?>


false
<container-configurations />
<resource-managers />
<enterprise-beans>

<ejb-name>TestBean</ejb-name>
<jndi-name>testJboss/Test</jndi-name>

</enterprise-beans>


+++++++++++++++++++ ejb-jar.xml ++++++++++++++++

<?xml version="1.0"?>

<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 1.1//EN" "http://java.sun.com/j2ee/dtds/ejb-jar_1_1.dtd">

<ejb-jar>
<display-name>Test</display-name>
<enterprise-beans>


Testing JBOSS
<ejb-name>TestBean</ejb-name>
org.jboss.docs.testJboss.interfaces.TestHome
org.jboss.docs.testJboss.interfaces.Test
<ejb-class>org.jboss.docs.testJboss.bean.TestBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.Integer</prim-key-class>
False
<cmp-field><field-name>id</field-name></cmp-field>
<cmp-field><field-name>name</field-name></cmp-field>

<primkey-field>id</primkey-field>


</enterprise-beans>

<assembly-descriptor>
<container-transaction>

<ejb-name>TestBean</ejb-name>
<method-intf>Remote</method-intf>
<method-name>*</method-name>

<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>


++++++++++++++++++ CLIENT src file (Upload.java) ++++++

package org.jboss.docs.testJboss;

import org.jboss.docs.testJboss.interfaces.TestHome;
import org.jboss.docs.testJboss.interfaces.Test;

import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

import java.util.Hashtable;
import java.util.StringTokenizer;
import java.util.Properties;
import java.io.FileInputStream;

/**
* Uploads a tab-delimited file of CD data to the database. There is a `main()'
* method so this class can be run from the command line. `main()' takes one
* command-line argument: the name of the file to upload. See the documentation
* for the `uploadFile()' method for details of the file format. Note that the
* uploading process may be very slow on some machines, especially if you are
* using an interpreting JVM. Expect to have a cup of coffee if you are
* uploading more than a hundred CDs.
* Note that the uploadFile method deletes the existing database before it
* uploads.
*/
public class Upload
{

/**
* Run the upload process from the command line.
*/
public static void main(String[] args)
{
String name = "Testing JBOSS";
int id = 10;

try
{
System.out.println("1. Value of ID is = " +id);
System.out.println("1. Value of name is =" +name);

uploadValue (id, name);
}

catch(Exception e)
{
System.err.println("ERROR: " + e.toString());
}
System.out.println ("OK");
}

/**
* This method uploads a database of CDs specified as a text file. The file
* must contain one line for each CD, with 5 fields on each line. The
* ordering of the fields is id-title-artist-type-notes. The fields are
* separated with tabs. Note that a tab on its own must exist as a
* placeholder for an empty field.
*/
public static void uploadValue (int id, String name)
throws javax.naming.NamingException,
java.rmi.RemoteException, javax.ejb.CreateException
{

// Get a naming context
InitialContext jndiContext = new InitialContext();

// Get a reference to a CD Bean
Object ref = jndiContext.lookup("testJboss/Test");

// Get a reference from this to the Bean's Home interface
TestHome home = (TestHome)
PortableRemoteObject.narrow (ref, TestHome.class);

System.out.println("2. Value of ID is = " +id);
System.out.println("2. Value of name is =" +name);

Test test = home.create(id, name);

System.out.println("3. Value of ID is = " +id);
System.out.println("3. Value of name is =" +name);

test.add();


} // End of uploadFile()

}

+++++++++++++++++++++++ build-client.xml ++++++++++

<?xml version="1.0" encoding="UTF-8" ?>
<!-- An Ant build file for the CMP tutorial code -->

















+++++++++++++++++++ build-testJboss-compile +++++++++
<?xml version="1.0" encoding="UTF-8" ?>
<!-- An Ant build file for the CMP tutorial code -->
















<!-- JNDI Client used to connect to JBoss running on localhost -->

<!-- File containing some cds -->
<!--

-->



++++++++++++++++ ERROR MESSAGE both in JBOSS server console & command prompt +++++++++++++++++

Message displayed in the JBOSS console after copying the test.jar in the deploy directory :

[AutoDeployer] Auto deploy of file:/C:/JBoss-2.4.0/deploy/Test.jar
[J2EE Deployer Default] Deploy J2EE application: file:/C:/JBoss-2.4.0/deploy/Test.jar
[J2eeDeployer] Create application Test.jar
[J2eeDeployer] install EJB module Test.jar
[Container factory] Deploying:file:/C:/JBoss-2.4.0/tmp/deploy/Default/Test.jar
[Verifier] Verifying file:/C:/JBoss-2.4.0/tmp/deploy/Default/Test.jar/ejb1001.jar
[Verifier]
Bean : TestBean
Method : public int ejbCreate(int, String)
Section: 9.2.3
Warning: The return type of an ejbCreate(...) method must be the entity bean's primary key type.

[Verifier]
Bean : TestBean
Section: 9.4.7.1
Warning: The primkey-field element must name a public field in the bean implementation class.

[Container factory] Deploying TestBean
[JAWS] Created table 'TEST' successfully.
[Default] null
[Bean Cache] Cache policy scheduler started
[ContainerManagement] Initializing
[ContainerManagement] Initialized
[ContainerManagement] Starting
[ContainerManagement] Started
[Container factory] Deployed application: file:/C:/JBoss-2.4.0/tmp/deploy/Default/Test.jar
[J2EE Deployer Default] J2EE application: file:/C:/JBoss-2.4.0/deploy/Test.jar is deployed.

Message displayed in the JBOSS console after running the client from the command prompt :

[TestBean] TRANSACTION ROLLBACK EXCEPTION:null; nested exception is:
javax.ejb.EJBException
[TestBean] java.lang.NullPointerException
[TestBean] at org.jboss.ejb.plugins.jaws.jdbc.JDBCCreateEntityCommand.execute(JDBCCreateEntityC
ommand.java:117)
[TestBean] at org.jboss.ejb.plugins.jaws.JAWSPersistenceManager.createEntity(JAWSPersistenceMan
ager.java:128)
[TestBean] at org.jboss.ejb.plugins.CMPPersistenceManager.createEntity(CMPPersistenceManager.ja
va:231)
[TestBean] at org.jboss.ejb.EntityContainer.createHome(EntityContainer.java:538)
[TestBean] at java.lang.reflect.Method.invoke(Native Method)
[TestBean] at org.jboss.ejb.EntityContainer$ContainerInterceptor.invokeHome(EntityContainer.jav
a:765)
[TestBean] at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invokeHome(EntitySynchroni
zationInterceptor.java:224)
[TestBean] at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceIntercep
tor.java:87)
[TestBean] at org.jboss.ejb.plugins.TxInterceptorCMT.invokeNext(TxInterceptorCMT.java:135)
[TestBean] at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:
307)
[TestBean] at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:86)
[TestBean] at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:103
)
[TestBean] at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:106)
[TestBean] at org.jboss.ejb.EntityContainer.invokeHome(EntityContainer.java:342)
[TestBean] at org.jboss.ejb.plugins.jrmp.server.JRMPContainerInvoker.invokeHome(JRMPContainerIn
voker.java:370)
[TestBean] at java.lang.reflect.Method.invoke(Native Method)
[TestBean] at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:241)
[TestBean] at sun.rmi.transport.Transport$1.run(Transport.java:142)
[TestBean] at java.security.AccessController.doPrivileged(Native Method)
[TestBean] at sun.rmi.transport.Transport.serviceCall(Transport.java:139)
[TestBean] at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:443)
[TestBean] at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:643)
[TestBean] at java.lang.Thread.run(Thread.java:484)

Message displayed in the command prompt after running the client :

C:\JBoss-2.4.0\examples\build>ant cmp-testJboss-upload
Buildfile: build.xml

validate:

fail_if_not_valid:

init:
[echo] Using JBoss directory=C:/JBoss-2.4.0
[echo] Using base classpath=C:\JBoss-2.4.0\client\jboss-j2ee.jar;C:\JBoss-2
.4.0\client\jaas.jar;C:\JBoss-2.4.0\client\jbosssx-client.jar;C:\JBoss-2.4.0\cli
ent\jboss-client.jar;C:\JBoss-2.4.0\client\jnp-client.jar;C:\jakarta-tomcat-3.2.
3\lib\servlet.jar
[echo] Using Source directory=C:\JBoss-2.4.0\examples
[echo] Using Build directory=C:\JBoss-2.4.0\examples/build-examples

cmp-testJboss-upload:

main:
[java] 1. Value of ID is = 10
[java] 1. Value of name is =Testing JBOSS
[java] 2. Value of ID is = 10
[java] 2. Value of name is =Testing JBOSS
[java] ERROR: java.rmi.ServerException: RemoteException occurred in server
thread; nested exception is:
[java] OK
[java] javax.transaction.TransactionRolledbackException: null; nested e
xception is:
[java] javax.ejb.EJBException

BUILD SUCCESSFUL

Total time: 12 seconds
C:\JBoss-2.4.0\examples\build>