No Persistence provider for EntityManager named

Question

I have my persistence.xml with the same name using TopLink under the META-INF directory. Then, I have my code calling it with:

EntityManagerFactory emfdb = Persistence.createEntityManagerFactory("agisdb");

Yet, I got the following error message:

2009-07-21 09:22:41,018 [main] ERROR - No Persistence provider for EntityManager named agisdb
javax.persistence.PersistenceException: No Persistence provider for EntityManager named agisdb
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:89)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)

Here is the persistence.xml :

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
    <persistence-unit name="agisdb">
        <class>com.agis.livedb.domain.AddressEntity</class>
        <class>com.agis.livedb.domain.TrafficCameraEntity</class>
        <class>com.agis.livedb.domain.TrafficPhotoEntity</class>
        <class>com.agis.livedb.domain.TrafficReportEntity</class>
        <properties>
            <property name="toplink.jdbc.url" value="jdbc:mysql://localhost:3306/agisdb"/>
            <property name="toplink.jdbc.driver" value="com.mysql.jdbc.Driver"/>
            <property name="toplink.jdbc.user" value="root"/>
            <property name="toplink.jdbc.password" value="password"/>
        </properties>
    </persistence-unit>
</persistence>

It should have been in the classpath. Yet, I got the above error.

Answer 1

在<persistence-unit name="agisdb"> ，定义持久化提供程序名称：

<provider>org.hibernate.ejb.HibernatePersistence</provider>

Answer 2

Put the "hibernate-entitymanager.jar" in the classpath of application.
For newer versions, you should use "hibernate-core.jar" instead of the deprecated hibernate-entitymanager

If you are running through some IDE, like Eclipse : Project Properties -> Java Build Path -> Libraries.

Otherwise put it in the /lib of your application.

Answer 3

确保persistence.xml文件位于以下目录中： <webroot>/WEB-INF/classes/META-INF

Answer 4

I needed this in my pom.xml file:

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>4.2.6.Final</version>
</dependency>

Answer 5

Faced the same issue and couldn't find solution for quite a long time. In my case it helped to replace

<provider>org.hibernate.ejb.HibernatePersistence</provider>

with

<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

Took solution from here

Answer 6

There is another point: If you face this problem within an Eclipse RCP environment, you might have to change the Factory generation from Persistence.createEntityManagerFactory to new PersistenceProvider().createEntityManagerFactory

see ECF for a detailed discussion on this.

Answer 7

Maybe you defined one provider like <provider>org.hibernate.ejb.HibernatePersistence</provider> but referencing another one in jar. That happened with me: my persistence.xml provider was openjpa but I was using eclipselink in my classpath. Hope this help!

Answer 8

Quick advice:

• check if persistence.xml is in your classpath
• check if hibernate provider is in your classpath

With using JPA in standalone application (outside of JavaEE), a persistence provider needs to be specified somewhere. This can be done in two ways that I know of:

• either add provider element into the persistence unit: <provider>org.hibernate.ejb.HibernatePersistence</provider> (as described in correct answere by Chris: https://stackoverflow.com/a/1285436/784594 )
• or provider for interface javax.persistence.spi.PersistenceProvider must be specified as a service, see here: http://docs.oracle.com/javase/6/docs/api/java/util/ServiceLoader.html (this is usually included when you include hibernate,or another JPA implementation, into your classpath

In my case, I found out that due to maven misconfiguration, hibernate-entitymanager jar was not included as a dependency, even if it was a transient dependency of other module.

Answer 9

If you are using Eclipse make sure that exclusion pattern does not remove your persistence.xml from source folders on build path.

1. Go to Properties -> Java Build Path -> Source tab
2. Check your exclusion pattern which is located at
   MyProject/src/main/java -> Excluded: <your_pattern>
   tree node
3. Optionally, set it to Excluded: (None) by selecting the node and clicking Edit... button on the left.

Answer 10

I'm some years late to the party here but I hit the same exception while trying to get Hibernate 3.5.1 working with HSQLDB and a desktop JavaFX program. I got it to work with the help of this thread and a lot of trial and error. It seems you get this error for a whole variety of problems:

No Persistence provider for EntityManager named mick

I tried building the hibernate tutorial examples but because I was using Java 10 I wasn't able to get them to build and run easily. I gave up on that, not really wanting to waste time fixing its problems. Setting up a module-info.java file (Jigsaw) is another hairball many people haven't discovered yet.

Somewhat confusing is that these (below) were the only two files I needed in my build.gradle file. The Hibernate documentation isn't clear about exactly which Jars you need to include. Entity-manager was causing confusion and is no longer required in the latest Hibernate version, and neither is javax.persistence-api. Note, I'm using Java 10 here so I had to include the jaxb-api, to get around some xml-bind errors, as well as add an entry for the java persistence module in my module-info.java file.

Build.gradle

// https://mvnrepository.com/artifact/org.hibernate/hibernate-core
compile('org.hibernate:hibernate-core:5.3.1.Final')

// https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api
compile group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.0'

Module-info.java

// Used for HsqlDB - add the hibernate-core jar to build.gradle too
requires java.persistence;

With hibernate 5.3.1 you don't need to specify the provider, below, in your persistence.xml file. If one is not provided the Hibernate provider is chosen by default.

<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

The persistence.xml file should be located in the correct directory so:

src/main/resources/META-INF/persistence.xml

Stepping through the hibernate source code in the Intellij debugger, where it checks for a dialect, also threw the exact same exception, because of a missing dialect property in the persistence.xml file. I added this (add the correct one for your DB type):

<property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>

I still got the same exception after this, so stepping through the debugger again in Intellij revealed the test entity I was trying to persist (simple parent-child example) had missing annotations for the OneToMany, ManyToOne relationships. I fixed this and the exception went away and my entities were persisted ok.

Here's my full final persistence.xml:

<persistence 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"
         version="2.1">

<persistence-unit name="mick" transaction-type="RESOURCE_LOCAL">
    <description>
        Persistence unit for the JPA tutorial of the Hibernate Getting Started Guide
    </description>

    <!-- Provided in latest release of hibernate
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    -->

    <class>com.micks.scenebuilderdemo.database.Parent</class>
    <class>com.micks.scenebuilderdemo.database.Child</class>

    <properties>
        <property name="javax.persistence.jdbc.driver" value="org.hsqldb.jdbc.JDBCDriver"/>

        <property name="javax.persistence.jdbc.url"
                  value="jdbc:hsqldb:file:./database/database;DB_CLOSE_DELAY=-1;MVCC=TRUE"/>

        <property name="javax.persistence.jdbc.user" value="sa"/>
        <property name="javax.persistence.jdbc.password" value=""/>

        <property name="hibernate.show_sql" value="true"/>
        <property name="hibernate.hbm2ddl.auto" value="create"/>
        <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>
    </properties>

</persistence-unit>

</persistence>

I probably wasted about half a day on this gem. My advice would be to start very simple - a single test entity with one or two fields, as it seems like this exception can have many causes.

Answer 11

Corner case: if you are using m2Eclipse, it automatically puts in excludes on your resources folders. Then when you try to run tests inside eclipse, the subsequent absence of persistence.xml will produce this error.

Answer 12

If you're using Maven, it could be that it is not looking at the right place for the META-INF folder. Others have mentioned copying the folder, but another way that worked for me was to tell Maven where to look for it, using the <resources> tag. See: http://maven.apache.org/plugins/maven-resources-plugin/examples/resource-directory.html

Answer 13

Make sure you have created persistence.xml file under the 'src' folder. I created under the project folder and that was my problem.

Answer 14

I faced the same problem, but on EclipseLink version 2.5.0 .

I solved my problem by adding yet another jar file which was necessarily ( javax.persistence_2.1.0.v201304241213.jar.jar );

Jars needed:
- javax.persistence_2.1.0.v201304241213.jar
- eclipselink.jar
- jdbc.jar (depending on the database used).

I hope this helps.

Answer 15

I also had this error but the issue was the namespace uri in the persistence.xml .

I replaced http://xmlns.jcp.org/xml/ns/persistence to http://java.sun.com/xml/ns/persistence and the version 2.1 to 2.0.

It's now working.

Answer 16

You need to add the hibernate-entitymanager-x.jar in the classpath.

In Hibernate 4.x, if the jar is present, then no need to add the org.hibernate.ejb.HibernatePersistence in persistence.xml file.

Answer 17

It happenes when the entity manager is trying to point to many persistence units. Do the following steps:

1. open the related file in your editor (provided your project has been closed in your IDE)
2. delete all the persistence and entity manager related code
3. save the file
4. open the project in your IDE
5. now bind the db or table of your choice

Answer 18

In an OSGi-context, it's necessary to list your persistence units in the bundle's MANIFEST.MF, eg

JPA-PersistenceUnits: my-persistence-unit

Otherwise, the JPA-bundle won't know your bundle contains persistence units.

See http://wiki.eclipse.org/EclipseLink/Examples/OSGi/Developing_with_EclipseLink_OSGi_in_PDE .

Answer 19

You need the following jar files in the classpath:

1. antlr-2.7.6.jar
2. commons-collections-3.1.jar
3. dom4j-1.6.1.jar
4. hibernate-commons-annotations-4.0.1.Final.jar
5. hibernate-core-4.0.1.Final.jar
6. hibernate-entitymanager.jar
7. hibernate-jpa-2.0-api-1.0.0.Final.jar
8. javassist-3.9.0.jar
9. jboss-logging-3.1.1.GA.jar
10. jta-1.1.jar
11. slf4j-api-1.5.8.jar
12. xxx-jdbc-driver.jar

Answer 20

我只是将 META-INF 复制到 src 中并工作！

Answer 21

Hibernate 5.2.5
Jar Files Required in the class path. This is within a required folder of Hibernate 5.2.5 Final release. It can be downloaded from http://hibernate.org/orm/downloads/

1. antlr-2.7.7
2. cdi-api-1.1
3. classmate-1.3.0
4. dom4j-1.6.1
5. el-api-2.2
6. geronimo-jta_1.1_spec-1.1.1
7. hibernate-commons-annotation-5.0.1.Final
8. hibernate-core-5.2.5.Final
9. hibernate-jpa-2.1-api-1.0.0.Final
10. jandex-2.0.3.Final
11. javassist-3.20.0-GA
12. javax.inject-1
13. jboss-interceptor-api_1.1_spec-1.0.0.Beta1
14. jboss-logging-3.3.0.Final
15. jsr250-api-1.0

Create an xml file "persistence.xml" in

YourProject/src/META-INF/persistence.xml

persistence.xml

<?xml version="1.0" encoding="UTF-8"?>

<persistence 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"
         version="2.1">

<persistence-unit name="sample">

    <class>org.pramod.data.object.UserDetail</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <properties>
        <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
        <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/hibernate_project"/>
        <property name="hibernate.connection.username" value="root"/>
        <property name="hibernate.connection.password" value="root"/>
        <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
        <property name="hibernate.show_sql" value="true"/>
        <property name="hibernate.format_sql" value="false"/>

        <property name="hibernate.cache.use_second_level_cache" value="false"/>

        <property name="hibernate.archive.autodetection" value="true"/>
    </properties>
</persistence-unit>

1. please note down the information mentioned in the < persistance > tag and version should be 2.1.
2. please note the name < persistance-unit > tag, name is mentioned as "sample" . This name needs to be used exactly same while loading your

EntityManagerFactor = Persistance.createEntityManagerFactory("sample"); . "sample" can be changed as per your naming convention.

Now create a Entity class. with name as per my example UserDetail, in the package org.pramod.data.object

UserDetail.java

package org.pramod.data.object;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "user_detail")
public class UserDetail {
    @Id
    @Column(name="user_id")
    private int id;
    @Column(name="user_name")
    private String userName;

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }   
    @Override
    public String toString() {
       return "UserDetail [id=" + id + ", userName=" + userName + "]";
    }
}

Now create a class with main method.

HibernateTest.java

package org.pramod.hibernate;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.pramod.data.object.UserDetail;

public class HibernateTest {
    private static EntityManagerFactory entityManagerFactory;

    public static void main(String[] args)  {
        UserDetail user = new UserDetail();
        user.setId(1);
        user.setUserName("Pramod Sharma");

        try {
            entityManagerFactory = Persistence.createEntityManagerFactory("sample");
            EntityManager entityManager = entityManagerFactory.createEntityManager();
            entityManager.getTransaction().begin();
            entityManager.persist( user );
            entityManager.getTransaction().commit();
            System.out.println("successfull");
            entityManager.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}

Output will be

UserDetail [id=1, userName=Pramod Sharma]
Hibernate: drop table if exists user_details
Hibernate: create table user_details (user_id integer not null, user_name varchar(255), primary key (user_id))
Hibernate: insert into user_details (user_name, user_id) values (?, ?)
successfull

Answer 22

In my case, previously I use idea to generate entity by database schema, and the persistence.xml is automatically generated in src/main/java/META-INF ,and according to https://stackoverflow.com/a/23890419/10701129 , I move it to src/main/resources/META-INF , also marked META-INF as source root. It works for me.

But just simply marking original META-INF(that is, src/main/java/META-INF) as source root, doesn't work, which confuses me.

and this is the structre:

Answer 23

The question has been answered already, but just wanted to post a tip that was holding me up. This exception was being thrown after previous errors. I was getting this:

property toplink.platform.class.name is deprecated, property toplink.target-database should be used instead.

Even though I had changed the persistence.xml to include the new property name:

<property name="toplink.target-database" value="oracle.toplink.platform.database.oracle.Oracle10Platform"/>

Following the message about the deprecated property name I was getting the same PersistenceException like above and a whole other string of exceptions. My tip: make sure to check the beginning of the exception sausage.

There seems to be a bug in Glassfish v2.1.1 where redeploys or undeploys and deploys are not updating the persistence.xml, which is being cached somewhere. I had to restart the server and then it worked.

Answer 24

If there are different names in Persistence.createEntityManagerFactory("JPAService") in different classes than you get the error. By refactoring it is possible to get different names which was in my case. In one class the auto-generated Persistence.createEntityManagerFactory("JPAService") in private void initComponents() , ContactsTable class differed from Persistence.createEntityManagerFactory("JPAServiceExtended") in DBManager class.

Answer 25

Mine got resolved by adding info in persistence.xml eg <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> and then making sure you have the library on classpath eg in Maven add dependency like

<dependency>
  <groupId>org.eclipse.persistence</groupId>
  <artifactId>eclipselink</artifactId>
  <version>2.5.0</version>
</dependency>

Answer 26

Verify the peristent unit name

<persistence-unit name="com.myapp.model.jpa"
    transaction-type="RESOURCE_LOCAL">    
public static final String PERSISTENCE_UNIT_NAME = "com.myapp.model.jpa";
Persistence.createEntityManagerFactory(**PERSISTENCE_UNIT_NAME**);

Answer 27

In my case it was about mistake in two properties as below. When I changed them 'No Persistence provider for EntityManager named' disappered.

So you could try test connection with your properties to check if everything is correct.

<property name="javax.persistence.jdbc.url" value="...”/>
<property name="javax.persistence.jdbc.password" value="...”/>

Strange error, I was totally confused because of it.

Answer 28

Try also copying the persistence.xml manually to the folder <project root>\\bin\\META-INF . This fixed the problem in Eclipse Neon with EclipseLink 2.5.2 using a simple plug-in project.

Answer 29

Had the same issue, but this actually worked for me :

mvn install -e  -Dmaven.repo.local=$WORKSPACE/.repository.

NB : The maven command above will reinstall all your project dependencies from scratch. Your console will be loaded with verbose logs due to the network request maven is making.

Answer 30

You have to use the absolute path of the file otherwise this will not work. Then with that path we build the file and pass it to the configuration.

@Throws(HibernateException::class)
fun getSessionFactory() : SessionFactory {
    return Configuration()
                .configure(getFile())
                .buildSessionFactory()
    }


private fun getFile(canonicalName: String): File {
    val absolutePathCurrentModule = System.getProperty("user.dir")
    val pathFromProjectRoot = absolutePathCurrentModule.dropLastWhile { it != '/' }
    val absolutePathFromProjectRoot = "${pathFromProjectRoot}module-name/src/main/resources/$canonicalName"
    println("Absolute Path of secret-hibernate.cfg.xml: $absolutePathFromProjectRoot")
    return File(absolutePathFromProjectRoot)
}

GL

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