Postgres 测试容器 - 如果存在级联，为什么要在删除表之前删除约束？

问题描述

我正在使用 Postgres 测试容器。如果表有任何约束，例如外键或唯一的 hibernate 试图首先删除此约束，但在出现 realation 不存在的错误之后 - 在此之后，警告“Hibernate: drop table if exists public.USERS cascade”被执行成功并创建表并添加了约束。最后，约束和表被成功删除。

如何去除这些警告？为什么它首先尝试删除这些约束，或者为什么它不能这样做（尽管该表不存在）？

测试配置：

spring:
  example:
    url: ${DB_URL}
    username: ${DB_USERNAME}
    password: ${DB_PASSWORD}
    vendor-overrides:
      hibernate.hbm2ddl.auto: create-drop
  example2:
    url: ${MYSQL_DB_URL}
    username: ${MYSQL_DB_USERNAME}
    password: ${MYSQL_DB_PASSWORD}
  jpa:
    properties:
      hibernate:
        default_schema: public
    show-sql: true
    hibernate:
      ddl-auto: create-drop

数据库配置类：

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef = DatabaseMainConfig.REPO_NAME + "EntityManagerFactory",basePackages = {DatabaseMainConfig.REPO_PACKAGE}
)
@Primary
public class DatabaseMainConfig {

    public static final String REPO_NAME = "example";
    public static final String REPO_PACKAGE = "com.example.repositories.main";
    public static final String DATASOURCE_NAME = REPO_NAME + "Datasource";

    @Primary
    @Bean(name = REPO_NAME + "DatasourceProperties")
    @ConfigurationProperties("spring." + REPO_NAME)
    public DataSourceProperties basicDatasourceProperties() {
        return new DataSourceProperties();
    }

    @Primary
    @Bean(name = DATASOURCE_NAME)
    @ConfigurationProperties("spring." + REPO_NAME + ".configuration")
    public HikariDataSource dataSource() {
        return basicDatasourceProperties()
                .initializeDataSourceBuilder()
                .type(HikariDataSource.class)
                .build();
    }

    @Primary
    @Bean(name = REPO_NAME + "vendorOverrides")
    @ConfigurationProperties(prefix = "spring." + REPO_NAME + ".vendor-overrides")
    public Map<String,String> hibernateOverrideConfig() {
        return new HashMap<>();
    }

    @Primary
    @Bean(name = REPO_NAME + "EntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(
            EntityManagerFactoryBuilder entityManagerFactoryBuilder,@Qualifier(REPO_NAME + "Datasource") DataSource dataSource,@Qualifier(REPO_NAME + "vendorOverrides") Map<String,String> vendorProperties) {
        return entityManagerFactoryBuilder
                .dataSource(dataSource)
                .packages(REPO_PACKAGE,"org.springframework.data.jpa.convert.threeten")
                .properties(vendorProperties)
                .persistenceUnit(REPO_NAME)
                .build();
    }

    @Primary
    @Bean
    public PlatformTransactionManager transactionManager(
            @Qualifier(REPO_NAME + "EntityManagerFactory")
                    EntityManagerFactory entityManagerFactory) {
        return new JpaTransactionManager(entityManagerFactory);
    }

}

测试容器：

public class PostgresTestContainer extends PostgreSQLContainer<PostgresTestContainer> {

    private static final String IMAGE_VERSION = "postgres:11.1";
    private static final String DATABASE_NAME = "example";
    private static PostgresTestContainer container;

    public PostgresTestContainer() {
        super(IMAGE_VERSION);
    }

    public static PostgresTestContainer getInstance() {
        if (container == null) {
            container = new PostgresTestContainer().withDatabaseName(DATABASE_NAME);
        }
        return container;
    }

    @Override
    public void start() {
        super.start();
        System.setProperty("DB_URL",container.getJdbcUrl());
        System.setProperty("DB_USERNAME",container.getUsername());
        System.setProperty("DB_PASSWORD",container.getPassword());
    }

    @Override
    public void stop() {
        //do nothing,JVM handles shut down
    }
}

Hibernate: alter table public.USERS drop constraint FKls73pryys8w3n2h1ximbc390r
2021-01-25 15:33:11.426  WARN 79124 --- [    Test worker] o.h.t.s.i.ExceptionHandlerLoggedImpl     : GenerationTarget encountered exception accepting command : Error executing DDL "alter table public.USERS drop constraint FKls73pryys8w3n2h1ximbc390r" via JDBC Statement

org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "alter table public.USERS drop constraint FKls73pryys8w3n2h1ximbc390r" via JDBC Statement
    at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlString(SchemaDropperImpl.java:375) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlStrings(SchemaDropperImpl.java:359) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.tool.schema.internal.SchemaDropperImpl.applyConstraintDropping(SchemaDropperImpl.java:331) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.tool.schema.internal.SchemaDropperImpl.dropFromMetadata(SchemaDropperImpl.java:230) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.tool.schema.internal.SchemaDropperImpl.performDrop(SchemaDropperImpl.java:154) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:126) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:112) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:145) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:316) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:469) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1259) [hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) [spring-orm-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) [spring-orm-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391) [spring-orm-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378) [spring-orm-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) [spring-orm-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855) [spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792) [spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) [spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) [spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) [spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) [spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) [spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1109) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:120) ~[spring-boot-test-2.3.1.RELEASE.jar:2.3.1.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) ~[spring-test-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124) ~[spring-test-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:123) ~[spring-test-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:118) ~[spring-test-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) ~[spring-test-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:244) ~[spring-test-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:98) ~[spring-test-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$5(ClassBasedTestDescriptor.java:341) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable(ClassBasedTestDescriptor.java:346) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$6(ClassBasedTestDescriptor.java:341) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_261]
    at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[na:1.8.0_261]
    at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384) ~[na:1.8.0_261]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[na:1.8.0_261]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) ~[na:1.8.0_261]
    at java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:312) ~[na:1.8.0_261]
    at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:743) ~[na:1.8.0_261]
    at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:742) ~[na:1.8.0_261]
    at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580) ~[na:1.8.0_261]
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors(ClassBasedTestDescriptor.java:340) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance(ClassBasedTestDescriptor.java:263) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$2(ClassBasedTestDescriptor.java:256) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at java.util.Optional.orElseGet(Optional.java:267) ~[na:1.8.0_261]
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$3(ClassBasedTestDescriptor.java:255) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances(TestInstancesProvider.java:29) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0(TestMethodTestDescriptor.java:108) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:107) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:71) ~[junit-jupiter-engine-5.6.2.jar:5.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$1(NodeTestTask.java:107) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:107) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:75) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at java.util.ArrayList.forEach(ArrayList.java:1259) ~[na:1.8.0_261]
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at java.util.ArrayList.forEach(ArrayList.java:1259) ~[na:1.8.0_261]
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) ~[junit-platform-engine-1.6.2.jar:1.6.2]
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:248) ~[na:na]
    at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$5(DefaultLauncher.java:211) ~[na:na]
    at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:226) ~[na:na]
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:199) ~[na:na]
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:132) ~[na:na]
    at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:99) ~[na:na]
    at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:79) ~[na:na]
    at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:75) ~[na:na]
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:61) ~[na:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_261]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_261]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_261]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_261]
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36) ~[na:na]
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) ~[na:na]
    at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33) ~[na:na]
    at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94) ~[na:na]
    at com.sun.proxy.$Proxy2.stop(Unknown Source) ~[na:na]
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.stop(TestWorker.java:133) ~[na:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_261]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_261]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_261]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_261]
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36) ~[na:na]
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) ~[na:na]
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182) ~[na:na]
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164) ~[na:na]
    at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414) ~[na:na]
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) ~[na:na]
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) ~[na:na]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_261]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_261]
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56) ~[na:na]
    at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_261]
Caused by: org.postgresql.util.PSQLException: ERROR: relation "public.users" does not exist
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2532) ~[postgresql-42.2.14.jar:42.2.14]
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2267) ~[postgresql-42.2.14.jar:42.2.14]
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:312) ~[postgresql-42.2.14.jar:42.2.14]
    at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:448) ~[postgresql-42.2.14.jar:42.2.14]
    at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:369) ~[postgresql-42.2.14.jar:42.2.14]
    at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:310) ~[postgresql-42.2.14.jar:42.2.14]
    at org.postgresql.jdbc.PgStatement.executeCachedSql(PgStatement.java:296) ~[postgresql-42.2.14.jar:42.2.14]
    at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:273) ~[postgresql-42.2.14.jar:42.2.14]
    at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:268) ~[postgresql-42.2.14.jar:42.2.14]
    at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:95) ~[HikariCP-3.4.5.jar:na]
    at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) ~[HikariCP-3.4.5.jar:na]
    at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ~[hibernate-core-5.4.17.Final.jar:5.4.17.Final]
    ... 124 common frames omitted
...
Hibernate: drop table if exists public.USERS cascade
2021-01-25 15:33:11.435  WARN 79124 --- [    Test worker] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Warning Code: 0,SQLState: 00000
2021-01-25 15:33:11.435  WARN 79124 --- [    Test worker] o.h.engine.jdbc.spi.SqlExceptionHelper   : table "users" does not exist,skipping
...
Hibernate: create table public.USERS (ID uuid not null,...
...
Hibernate: alter table public.USERS add constraint FK7fj7x1mh4r0mwjpcm9p126fh4 foreign key (CONTACT_ADDRESS_ID) references public.ADDRESSES
Hibernate: alter table public.USERS add constraint FKls73pryys8w3n2h1ximbc390r foreign key (ORGANIZATION_ID) references public.ORGANIZATIONS
...
Hibernate: alter table public.USERS drop constraint FK7fj7x1mh4r0mwjpcm9p126fh4
Hibernate: alter table public.USERS drop constraint FKls73pryys8w3n2h1ximbc390r
...
Hibernate: drop table if exists public.USERS cascade
``

解决方法

Why is it trying to drop these constraints first or why it cannot do this (despite this that table doesn't exists)?

我认为这是因为您配置了以下内容：

hibernate:
      ddl-auto: create-drop

就我的知识而言，create 在创建新表之前已经删除了现有表和 FK，因此使用 create-drop 将导致双重删除（创建表之前的第一个，spring 上下文关闭后的第二个）。由于第一个 drop 已经发生在第二个之前，因此 FK 不再存在。