WebChannel JPA Error "No Persistence provider for EntityManager"

Question

Hello Colleagues,
In WebChannel  for Personalization, we are using Java Persistence API JPA project to connect to java stack Max DB .
Here I have created JPA project, with out any error done mapping also. with orm.xml and persistense .xml
I am getting No Persistence provider for EntityManager error when calling Entity Manager in Entity class
> EntityManagerFactory emf = Persistence.createEntityManagerFactory("Personalization_JPA");
          EntityManager em = emf.createEntityManager();
          Attribute_entity ae = new Attribute_entity();
          ae.setEMPID(56);
          ae.setPreferences("Raghu");
          Transaction tx = (Transaction) em.getTransaction();
          em.persist(ae);
I am using org.eclipse.persistence.jpa.PersistenceProvider as Persistence Provider
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
          <persistence-unit name="Personalization_JPA">
          <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
          <mapping-file>META-INF/orm.xml</mapping-file>
          <class>personalization.model.PersonalizationEntity</class>
          <class>personalization.model.Attribute_entity</class>
          <class>personalization.model.Test</class>
          </persistence-unit>
</persistence>
Can any one please tell me how to solve this issue.?

Answer 1

Hello colleague,
As per your suggestion I removed Persistence Provider as "org.eclipse.persistence.jpa.PersistenceProvider", made it blank in persistence.xml, but still I get the same error saying No Persistence provider for EntityManager, please have a look at other attributes of persistence.xml
In persistence.xml for my JPA project , I have included following in respective tabs
1) GENERAL Tab of Persistence.xml
a) Persistence Provider as  blank or "org.eclipse.persistence.jpa.PersistenceProvider" makes no difference
b) In Managed classes included my Entity class and test application that calls the entity manager
c) orm.xml in xml mapping files
2) Connections Tab of Persistence.xml
a) Transaction Type as Resource Local, not using any JTA datasourse name in database field
3) Properties Tab of Persistence.xml (connecting to maxdb, so is this necessary or not )
property name="driver" value="com.sap.dbtech.jdbc.DriverSapDB"
property name="url" value="jdbc:sapdb://localhost/w15"
property name="username" value="SAPW15DB"
property name="password" value="sapsapr3"
If anything wrong is specified please kindly inform me.