I am using Eclipse, Derby and Hibernate and have set a project with a module descriptor as follows.

This is my persistence.xml file
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="https://jakarta.ee/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="3.0" >
<persistence-unit name="Todo_Hibernate" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>todo.Todo</class>
<properties>
<property name="jakarta.persistence.jdbc.url" value="jdbc:derby:D:\Eclipse_Java_21\Datenbanken\Hibernate_DB;create=true"/>
<property name="jakarta.persistence.jdbc.user" value=""/>
<property name="jakarta.persistence.jdbc.password" value=""/>
<property name="jakarta.persistence.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.DerbyDialect"/>
<property name="hibernate.hbm2ddl.auto" value="create"/>
</properties>
</persistence-unit>
</persistence>
I am getting the following Warning and Exception
WARNUNG: jakarta.persistence.spi::No valid providers found. Exception in thread "main" jakarta.persistence.PersistenceException: No Persistence provider for EntityManager named Todo_Hibernate
I have defined the provider in the persistence.xml. Where else do I need to define the provider?
It works fine when not using a modularized project.
Thanks, Walter