Mike Becker ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=6321cb8... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNTVlNzI2YTkz... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-15512?atlOrigin=eyJpIjoiNTVlNz... ) HHH-15512 ( https://hibernate.atlassian.net/browse/HHH-15512?atlOrigin=eyJpIjoiNTVlNz... ) Mysterious complaint about orphan removal within a parameterized test case ( https://hibernate.atlassian.net/browse/HHH-15512?atlOrigin=eyJpIjoiNTVlNz... ) Change By: Mike Becker ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=6321cb8... ) I cannot even explain what is happening here, you have to see for yourself. But you need JUnit 5 to run the test case below. The exception hibernate throws is the following: {quote}A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance: org.hibernate.bugs.TestHHH15511$EntityHHH15511.absolutelyIrrelevant{quote} But {{absolutelyIrrelevant}} is indeed absolutely irrelevant. This collection is never touched in the entire test case. It looks like something bad is happening, when the {{persist()}} of the entities requires an INSERT due to generation strategy IDENTITY. If I remove that, the bug does not occur. If I keep the strategy IDENTITY and add a manual {{flush()}} after persist, the bug also does not occur. *TestHHH15512.java* {code:java}/* * Copyright 2014 JBoss Inc * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.hibernate.bugs; import jakarta.persistence.*; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.annotations.CascadeType; import org.hibernate.annotations.*; import org.hibernate.boot.MetadataSources; import org.hibernate.boot.registry.StandardServiceRegistryBuilder; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeAll; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.params.ParameterizedTest; import org.junit.jupiter.params.provider.Arguments; import org.junit.jupiter.params.provider.MethodSource; import java.io.Serializable; import java.util.*; import java.util.stream.Stream; import static org.hamcrest.MatcherAssert.assertThat; import static org.hamcrest.Matchers.equalTo; import static org.hamcrest.Matchers.notNullValue; import static org.junit.jupiter.api.Assertions.assertTrue; /** * This test case demonstrates that Hibernate throws an irritating exception * regarding orphan removal when used in a parameterized test case. */ public class TestHHH15512 { @Entity public static class EntityHHH15512 implements Serializable { private static final long serialVersionUID = -6257173309941686129L; @Id private String id; @ LazyCollection(LazyCollectionOption.TRUE) @ Cascade(CascadeType.ALL) @ OnDelete(action = OnDeleteAction.CASCADE) @ OneToMany(orphanRemoval = true, mappedBy = "parent") private final List<EntityHHH15512OtherChild> absolutelyIrrelevant = new ArrayList<>(); @ LazyCollection(LazyCollectionOption.TRUE) @ Cascade(CascadeType.ALL) @ OnDelete(action = OnDeleteAction.CASCADE) @ OneToMany(orphanRemoval = true, mappedBy = "parent") private final List<EntityHHH15512Child> children = new ArrayList<>(); public EntityHHH15512() { } public EntityHHH15512(String id) { this.id = id; } public String getId() { return id; } public void addChild(EntityHHH15512Child c) { c.parent = this; children.add(c); } public List<EntityHHH15512Child> getChildren() { return Collections.unmodifiableList(children); } } @Entity public static class EntityHHH15512Child implements Serializable { private static final long serialVersionUID = -2368261096109532326L; @Id @GeneratedValue(strategy = GenerationType.IDENTITY) // BUG // @GeneratedValue(strategy = GenerationType.AUTO) // NO BUG private Long id; @Basic private String name; @Basic private String value; @ManyToOne(fetch = FetchType.LAZY, optional = false) @JoinColumn(name = "fk_entity_hhh15512", nullable = false) private EntityHHH15512 parent; public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getValue() { return value; } public void setValue(String value) { this.value = value; } } @Entity public static class EntityHHH15512OtherChild implements Serializable { private static final long serialVersionUID = 9215581277353861289L; @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; @ManyToOne(fetch = FetchType.LAZY, optional = false) @JoinColumn(name = "fk_entity_hhh15512", nullable = false) private EntityHHH15512 parent; public void setId(Long id) { this.id = id; } } @Entity public static class EntityHHH15512Log { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; @Basic private String name; @Basic private String message; public EntityHHH15512Log() { } public EntityHHH15512Log(String name, String message) { this.name = name; this.message = message; } } private Transaction tx; private static SessionFactory sf; @BeforeAll public static void buildSessionFactory() throws Exception { final var prop = new Properties(); // load the default hibernate.properties from the test case templates try (final var res = TestHHH15512.class.getClassLoader().getResourceAsStream("hibernate.properties")) { prop.load(Objects.requireNonNull(res)); } final var srb = new StandardServiceRegistryBuilder() .applySettings(prop) // not part of default hibernate.properties, not required in JUnit 4 case , because magic and so... // here we have less magic, so we need to specify it manually .applySetting("hibernate.hbm2ddl.auto", "create-drop") // this is required to make getCurrentSession() work .applySetting("hibernate.current_session_context_class", "thread"); // use the default resource path from the test case templates with our own mappings final var metadata = new MetadataSources(srb.build()) .addResource("org/hibernate/orm/test/mappings-hhh15512.xml") .buildMetadata(); sf = metadata.buildSessionFactory(); } @BeforeEach public void openTransaction() { final var s = sf.getCurrentSession(); tx = s.beginTransaction(); } @AfterEach public void closeTransaction() { tx.commit(); } private static Stream<Arguments> myMethodSource() { return Stream.of( Arguments.of(1, true), Arguments.of(2, false), Arguments.of(3, true), Arguments.of(4, false) ); } @ParameterizedTest @MethodSource("myMethodSource") public void hhh15512Test(long irrelevant, boolean log) { // given final var child = new EntityHHH15512Child(); child.setName("key"); child.setValue("val"); final var e = new EntityHHH15512(UUID.randomUUID().toString()); e.addChild(child); sf.getCurrentSession().persist(e); // sf.getCurrentSession().flush(); // hides the bug even with GenerationStrategy.IDENTITY // when serviceMethod(e, log); // then final var testee = sf.getCurrentSession().find(EntityHHH15512.class, e.getId()); assertThat(testee, notNullValue()); final var cv = testee.getChildren().stream().filter(c -> c.getName().equals("key")).findAny(); assertTrue(cv.isPresent()); assertThat(cv.get().getValue(), equalTo(log ? "val" : "other")); } private void serviceMethod(EntityHHH15512 e, boolean log) { // imagine this is some service method in some real world production code // in that one case it just logs some message and in the session would obviously be obtained by sessionFactory.getCurrentSession() other case it modifies a value // but in this test case this is details are not possible - but that does not change the behavior significantly important if (log) { // but writing that log message actually IS important // because it has something to do with the findByQuery() call writeLogMessage(e.getId(), "Irrelevant"); } else { e.getChildren().stream().filter(c -> c.getName().equals("key")).findAny().ifPresent(c -> c.setValue("other")); } } private void writeLogMessage(String id, String message) { sf.getCurrentSession().save(new EntityHHH15512Log( findByQuery(id).getId(), message)) ; // imagine this is used to write some log message - we remove the noise here } private EntityHHH15512 findByQuery(String id) { return sf.getCurrentSession() .createQuery("select e from TestHHH15512$EntityHHH15512 e where e.id = :id", EntityHHH15512.class) .setParameter("id", id) .getSingleResult(); } } {code} *mappings-hhh15512.xml* {code:xml}<?xml version="1.0" encoding="UTF-8"?> <entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd" version="1.0"> <entity class="org.hibernate.bugs.TestHHH15512$EntityHHH15512"/> <entity class="org.hibernate.bugs.TestHHH15512$EntityHHH15512Child"/> <entity class="org.hibernate.bugs.TestHHH15512$EntityHHH15512OtherChild"/> < entity class="org.hibernate.bugs.TestHHH15512$EntityHHH15512Log" / > </ entity-mappings> {code} *hibernate.properties (default from the test case template)* {noformat}# # Hibernate, Relational Persistence for Idiomatic Java # # License: GNU Lesser General Public License (LGPL), version 2.1 or later. # See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>;. # hibernate.dialect org.hibernate.dialect.H2Dialect hibernate.connection.driver_class org.h2.Driver hibernate.connection.url jdbc:h2:mem:db1;DB_CLOSE_DELAY=-1 hibernate.connection.username sa hibernate.connection.password hibernate.connection.pool_size 5 hibernate.show_sql false hibernate.format_sql true hibernate.max_fetch_depth 5 hibernate.cache.region_prefix hibernate.test hibernate.cache.region.factory_class org.hibernate.testing.cache.CachingRegionFactory # NOTE: hibernate.jdbc.batch_versioned_data should be set to false when testing with Oracle hibernate.jdbc.batch_versioned_data true jakarta.persistence.validation.mode=NONE hibernate.service.allow_crawling=false hibernate.session.events.log=true{noformat} *dependencies from the pom.xml (in case anyone has problems to get the JUnit 5 test case running)* {code:xml}<dependencies> <dependency> <groupId>org.hibernate.orm</groupId> <artifactId>hibernate-testing</artifactId> <version>6.1.3.Final</version> <scope>test</scope> </dependency> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> <version>1.4.200</version> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-api</artifactId> <version>5.9.0</version> <scope>test</scope> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-params</artifactId> <version>5.9.0</version> <scope>test</scope> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-engine</artifactId> <version>5.9.0</version> <scope>test</scope> </dependency> </dependencies>{code} ( https://hibernate.atlassian.net/browse/HHH-15512#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15512#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! 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