[EL Severe]: ejb: 2017-06-04 19:29:55.066--ServerSession(1644987969)--Exception [EclipseLink-7107] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Error encountered during string decryption.
Internal Exception: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-7107] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Error encountered during string decryption.
Internal Exception: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher

private EntityManagerFactory factory;
    private EntityManager em;

    public JpaDatabaseConnection() {

        factory = Persistence.createEntityManagerFactory("blogspace");
        em = factory.createEntityManager();
    }

<?xml version="1.0" encoding="UTF-8" ?>
<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_2_0.xsd"
    version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">

    <persistence-unit name="blogspace" transaction-type="RESOURCE_LOCAL">
        <class>pl.furman.server.database.entities.User</class>
        <properties>
            <property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver" />
            <property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost/blogspace" />
            <property name="javax.persistence.jdbc.user" value="blogserver" />
            <property name="javax.persistence.jdbc.password" value="123456" />
            <!-- EclipseLink should create the database schema automatically -->
            <property name="eclipselink.ddl-generation" value="create-tables" />
            <property name="eclipselink.ddl-generation.output-mode" value="database" />
        </properties>
    </persistence-unit>
</persistence>

Internal Exception: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:815)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:205)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:305)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:337)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:303)
    at demo.service.UserService.<init>(UserService.java:14)
    at demo.Runner.main(Runner.java:8)
Caused by: Exception [EclipseLink-7107] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Error encountered during string decryption.
Internal Exception: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
    at org.eclipse.persistence.exceptions.ValidationException.errorDecryptingPassword(ValidationException.java:894)
    at org.eclipse.persistence.internal.security.JCEEncryptor.decryptPassword(JCEEncryptor.java:114)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.updateLogins(EntityManagerSetupImpl.java:2404)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.updateSession(EntityManagerSetupImpl.java:2716)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:710)
    ... 6 more
Caused by: javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:934)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:845)
    at com.sun.crypto.provider.DESCipher.engineDoFinal(DESCipher.java:314)
    at javax.crypto.Cipher.doFinal(Cipher.java:2165)
    at org.eclipse.persistence.internal.security.JCEEncryptor.decryptPassword(JCEEncryptor.java:109)
    ... 9 more

<dependency>
     <groupId>org.eclipse.persistence</groupId>
     <artifactId>eclipselink</artifactId>
     <version>2.6.5-RC2</version>
 </dependency>