Persistence error in JPA - jpa

Question

I am creating a small JPA project.
But I am receiving the below error, when I run the main class.
Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named ClientAccount
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:34)
at com.infinite.ClientAccountMain.main(ClientAccountMain.java:12)
the name in the persistence unit is the same used in the entity manager factory
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("ClientAccount");
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="ClientAccount">
<description>My Persistence Unit</description>
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>com.infinite.Order</class>
<class>com.infinite.Account</class>
<class>com.infinite.Client</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
<property name="javax.persistence.jdbc.url" value="jdbc:sqlserver://localhost:3306;databaseName=testdatabase" />
<property name="javax.persistence.jdbc.user" value="test"/>
<property name="javax.persistence.jdbc.password" value="test"/>
</properties>
</persistence-unit>

Answer 1

I think that Neil Stockton is right and if you search a bit you will find your answer. Although I think that must be something in relation with your provider information.
Try to put something like this.
For OpenJPA
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
Source information ---> http://openjpa.apache.org/builds/1.0.3/apache-openjpa-
1.0.3/docs/manual/jpa_overview_persistence.html
For Hibernate
<provider>org.hibernate.ejb.HibernatePersistence</provider>

Answer 2

There are multiple causes for this error:
You do not have the specified JPA provider on your classpath (check the JARs).
You did not define the persistence unit in your persistence.xml file.
Your persistence provider did not find your persistence.xml file (usually it is in META-INF/persistence.xml). Check that it is on the right place.