I'm trying to use EBJ3 to manage a table in my database, when I ran my test client, I always received this:

Exception in thread "main" java.lang.NoSuchFieldError: TRACE
 at org.jboss.logging.Log4jLoggerPlugin.isTraceEnabled(Log4jLoggerPlugin.java:85)
 at org.jboss.logging.Logger.isTraceEnabled(Logger.java:122)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:660)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627)
 at javax.naming.InitialContext.lookup(InitialContext.java:392)
 at TestEJBClient.main(TestEJBClient.java:31)

Although I have created two properties files and referenced all the jar in the JBOSS_HOME/client directory... I'm stuck
Anyone please help! I need to do this urgently.

Below is all the code:

// Table ADMIN:
// Username nvarchar(20) PK
// Password nvarchar(20)

**** Entity bean: Admin ****
@Entity
@Table(name = "Admin", schema = "dbo", catalog = "TungaRestaurant", uniqueConstraints = {})
public class Admin implements java.io.Serializable {
 private String username;
 private String password;

 public Admin(String username, String password) {
 this.username = username;
 this.password = password;
 }

 @Id
 @Column(name = "Username", unique = true, nullable = false, insertable = true, updatable = true, length = 20)
 public String getUsername() {
 return this.username;
 }
 public void setUsername(String username) {
 this.username = username;
 }

 @Column(name = "Password", unique = false, nullable = false, insertable = true, updatable = true, length = 20)
 public String getPassword() {
 return this.password;
 }
 public void setPassword(String password) {
 this.password = password;
 }
}

*** Session Bean to manage Admin Entity: AdminBean ***
@Stateless
public class AdminBean implements Serializable, AdminMan, AdminBeanLocal, AdminBeanRemote {
 @PersistenceContext
 EntityManager em;
 public int delete(Admin admin) {
 return delete (admin.getUsername());
 }

 public int delete(String usr) {
 int retVal = 0;
 Admin admin = em.find(Admin.class, usr);
 try
 {
 em.remove(admin);
 }
 catch (Exception ex)
 {
 retVal = -1;
 }
 return retVal;
 }

 public Admin findAdmin(String usr) {
 return em.find(Admin.class, usr);
 }

 public int save(Admin admin) {
 int retVal = 0;
 try {
 Admin dbadmin = em.find(Admin.class, admin.getUsername());
 if (dbadmin == null)
 em.persist(admin);
 else
 {
 dbadmin.setPassword(admin.getPassword());
 em.flush();
 }
 } catch (Exception ex) {
 retVal = -1;
 }
 return retVal;
 }
}

*** Interface AdminMan ****
public interface AdminMan {
 /*
 * Return an the Admin with username
 * @param String username
 * @return a tunga.ejb.Admins object
 */
 public Admin findAdmin(String usr);

 /*
 * Save the Admin's information to database, if the Admin is existed, the info
 * will be update, if not, a new Admin will be inserted to database.
 * @param tunga.ejb.Admin the Admin object that holds information
 * @return 0 if ok, <0 if not
 */
 public int save(Admin admin);

 /*
 * Delete the Admin from the database
 * @param tunga.ejb.Admin the Admin object that holds information
 * @return 0 if ok, <0 if not
 */
 public int delete(Admin admin);

 /*
 * Delete the Admin from the database
 * @param int the Admin's username
 * @return 0 if ok, <0 if not
 */
 public int delete(String usr);
}

*********************************
The Client:

**** File: jndi.properties ****
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099

***** File: log4j.properties *****
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
log4j.rootLogger=debug, stdout

**** Class test Client
public class TestEJBClient {
 public static void main(String[] args) {
 Context context;
 try
 {
 context = new InitialContext();
 AdminMan adminMan = (AdminMan)context.lookup("AdminBean");

 Admin admin = new Admin("admin","123");
 adminMan.save(admin);

 } catch (NamingException e)
 {
 e.printStackTrace();
 }
 }
}