Victor Williams Stafusa da Silva ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5e8c88d... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiMjcwM2MwNzNj... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-13938?atlOrigin=eyJpIjoiMjcwM2... ) HHH-13938 ( https://hibernate.atlassian.net/browse/HHH-13938?atlOrigin=eyJpIjoiMjcwM2... ) NullPointerException at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.toClassDescriptor - Hibernate 6.0.0.Alpha4 ( https://hibernate.atlassian.net/browse/HHH-13938?atlOrigin=eyJpIjoiMjcwM2... ) Change By: Victor Williams Stafusa da Silva ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5e8c88d... ) This code works fine in Hibernate 5.4.13.Final, but gives a NullPointerException at Hibernate 6.0.0.Alpha4: Test file: *HBug.java* {code:java}package com.example; import java.util.HashMap; import java.util.Map; import java.util.Optional; import java.util.Set; import javax.persistence.spi.PersistenceProvider; import org.hibernate.SessionFactory; import org.hibernate.jpa.HibernatePersistenceProvider; /** * @author Victor Williams Stafusa da Silva */ public class Hbug { public static void main(String[] args) throws Exception { Map<String, String> props = new HashMap<>(); props.put("javax.persistence.jdbc.user", "sa"); props.put("javax.persistence.jdbc.password", ""); props.put("javax.persistence.jdbc.url", "jdbc:hsqldb:mem:test1"); props.put("hibernate.hbm2ddl.import_files_sql_extractor", "org.hibernate.tool.hbm2ddl.MultipleLinesSqlCommandExtractor"); props.put("javax.persistence.schema-generation.database.action", "drop-and-create"); PersistenceProvider pp = new HibernatePersistenceProvider(); var spui = new SimplePersistenceUnitInfo( Optional.empty(), HibernatePersistenceProvider.class, "test-1", Set.of(Fruit.class), props); var emf = pp.createContainerEntityManagerFactory(spui, props); if (!(emf instanceof SessionFactory)) throw new Exception("Bad EMF"); } }{code} Utilitary class used by the above one: *SimplePersistenceUnitInfo.java* {code:java}package com.example; import java.io.IOException; import java.io.UncheckedIOException; import java.net.URL; import java.util.Collection; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Optional; import java.util.Properties; import java.util.stream.Collectors; import javax.persistence.SharedCacheMode; import javax.persistence.ValidationMode; import javax.persistence.spi.ClassTransformer; import javax.persistence.spi.PersistenceProvider; import javax.persistence.spi.PersistenceUnitInfo; import javax.persistence.spi.PersistenceUnitTransactionType; import javax.sql.DataSource; /** * @author Victor Williams Stafusa da Silva */ public final class SimplePersistenceUnitInfo implements PersistenceUnitInfo { private final Optional<URL> url; private final Class<? extends PersistenceProvider> providerClass; private final String persistenceUnitName; private final List<String> classes; private final Map<String, String> properties; public SimplePersistenceUnitInfo( /*@NonNull*/ Optional<URL> url, /*@NonNull*/ Class<? extends PersistenceProvider> providerClass, /*@NonNull*/ String persistenceUnitName, /*@NonNull*/ Collection<Class<?>> classes, /*@NonNull*/ Map<String, String> properties) { this.url = url; this.providerClass = providerClass; this.persistenceUnitName = persistenceUnitName; this.classes = classes.stream().map(Class::getName).collect(Collectors.toList()); this.properties = new HashMap<>(); this.properties.putAll(properties); } @Override public String getPersistenceUnitName() { return persistenceUnitName; } @Override public String getPersistenceProviderClassName() { return providerClass.getName(); } @Override public PersistenceUnitTransactionType getTransactionType() { return PersistenceUnitTransactionType.RESOURCE_LOCAL; } @Override //@Nullable public DataSource getJtaDataSource() { return null; } @Override //@Nullable public DataSource getNonJtaDataSource() { return null; } @Override public List<String> getMappingFileNames() { return Collections.emptyList(); } @Override public List<URL> getJarFileUrls() { try { return Collections.list(this.getClass().getClassLoader().getResources("")); } catch (IOException e) { throw new UncheckedIOException(e); } } //@Nullable @Override public URL getPersistenceUnitRootUrl() { return url.orElse(null); } @Override public List<String> getManagedClassNames() { return Collections.unmodifiableList(classes); } @Override public boolean excludeUnlistedClasses() { return false; } @Override public SharedCacheMode getSharedCacheMode() { return SharedCacheMode.UNSPECIFIED; } @Override public ValidationMode getValidationMode() { return ValidationMode.AUTO; } @Override public Properties getProperties() { Properties p = new Properties(); p.putAll(properties); return p; } @Override public String getPersistenceXMLSchemaVersion() { return "2.2"; } @Override //@Nullable public ClassLoader getClassLoader() { return Thread.currentThread().getContextClassLoader(); } @Override public void addTransformer(ClassTransformer transformer) { } @Override //@Nullable public ClassLoader getNewTempClassLoader() { return null; } }{code} Sample entity class: *Fruit.java* {code:java}package com.example; import java.io.Serializable; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; /** * @author Victor Williams Stafusa da Silva */ @Entity @Table(name = "fruits") public class Fruit implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Integer id; private String name; private String color; public Fruit() {} public Fruit(String name, String color) { this.name = name; this.color = color; } public String getName() { return name; } public String getColor() { return color; } }{code} Gradle script to build that: *build.gradle* {code:java}apply plugin: 'java' apply plugin: 'application' group = 'com.example' mainClassName = 'com.example.Hbug' repositories { jcenter() } dependencies { implementation 'org.hsqldb:hsqldb:2.5.0' //implementation 'org.hibernate:hibernate-core:5.4.13.Final' implementation 'org.hibernate.orm:hibernate-core:6.0.0.Alpha4' }{code} Run the code above and a ` NullPointerException ` will be throw (with Hibernate 6.0.0.Alpha4). However, if the gradle file is changed to use Hibernate 5.4.13 (uncomment that line and comment the one for 6.0.0.Alpha4), then the code works as expected. Here is the output, including the stack trace: *output* {code:java}Apr 07, 2020 7:19:53 AM org.hibernate.jpa.internal.util.LogHelper logPersistenceUnitInformation INFO: HHH000204: Processing PersistenceUnitInfo [name: test-1] Apr 07, 2020 7:19:54 AM org.hibernate.Version logVersion INFO: HHH000412: Hibernate Core {6.0.0.Alpha4} Apr 07, 2020 7:19:54 AM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit> INFO: HCANN000001: Hibernate Commons Annotations {5.1.0.Final} Exception in thread "main" java.lang.NullPointerException at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.toClassDescriptor(ClassFileArchiveEntryHandler.java:84) at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.toClassDescriptor(ClassFileArchiveEntryHandler.java:67) at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.handleEntry(ClassFileArchiveEntryHandler.java:53) at org.hibernate.boot.archive.internal.JarFileBasedArchiveDescriptor.visitArchive(JarFileBasedArchiveDescriptor.java:147) at org.hibernate.boot.archive.internal.JarProtocolArchiveDescriptor.visitArchive(JarProtocolArchiveDescriptor.java:59) at org.hibernate.boot.archive.scan.spi.AbstractScannerImpl.scan(AbstractScannerImpl.java:40) at org.hibernate.boot.model.process.internal.ScanningCoordinator.coordinateScan(ScanningCoordinator.java:74) at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.prepare(MetadataBuildingProcess.java:97) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:243) at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:169) at org.hibernate.jpa.boot.spi.Bootstrap.getEntityManagerFactoryBuilder(Bootstrap.java:32) at org.hibernate.jpa.boot.spi.Bootstrap.getEntityManagerFactoryBuilder(Bootstrap.java:89) at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilder(HibernatePersistenceProvider.java:166) at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:141) at com.example.Hbug.main(Hbug.java:31){code} P.S.: I'm running and compiling this using Java 13.0.2. ( https://hibernate.atlassian.net/browse/HHH-13938#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-13938#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100124- sha1:c13ca0d )