我有一个Spring Boot应用程序，其中包含一些集成测试，用于检查数据库中数据的前端操作结果。
该应用程序在spring-data-jpa和spring-data-rest下使用DataNucleus JPA，并使用内存数据库，例如： Derby，通过Spring Boot测试自动设置。
我曾经使用过Hibernate，但我把它换成了DataNucleus。测试全部都是通过Hibernate传递的，但现在我的测试JdbcTemplate查询正在挂起，好像JPA没有释放它的锁。
我已经尝试过H2（无声失败），Derby（挂起直到超时）和HSQLDB（永远挂起）。
我尝试了各种解决方法，例如：没有交易@Transactional(Transactional.TxType.NEVER)或有/无提交@Rollback(true/false)
Spring Boot自动实例化数据源并将其注入EntityManagerFactory和JdbcTemplate。
这是测试：
@ExtendWith(SpringExtension.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.MOCK,
classes = { TestDataSourceConfig.class })
@EnableAutoConfiguration
@AutoConfigureMockMvc
@AutoConfigureTestDatabase(connection = EmbeddedDatabaseConnection.DERBY)
@Transactional
public class SymbolRestTests {
@Autowired
private MockMvc mockMvc;
@Autowired
private JdbcTemplate jdbcTemplate;
@Autowired
private SymbolRepository symbolRepository;
@PersistenceContext
private EntityManager entityManager;
@Before
public void setUp() throws Exception {
symbolRepository.deleteAll();
entityManager.flush();
entityManager.clear();
}
@Test
public void shouldCreateEntity() throws Exception {
String testTitle = "TEST.CODE.1";
String testExtra = "Test for SymbolRestTests.java";
String json = createJsonExample(testTitle, testExtra, true);
MockHttpServletRequestBuilder requestBuilder =
post("/symbols").content(json);
mockMvc.perform(requestBuilder)
.andExpect(status().isCreated())
.andExpect(header().string("Location",
containsString("symbols/")));
entityManager.flush();
entityManager.close(); // this didn't help
String sql = "SELECT count(*) FROM symbol WHERE title = ?";
// exception thrown on this next line
int count = jdbcTemplate.queryForObject(
sql, new Object[] { testTitle }, Integer.class);
Assert.assertThat(count, is(1));
}
}
这是HSQLDB的错误（似乎是提供最多信息的）：
org.springframework.dao.CannotAcquireLockException: PreparedStatementCallback;
SQL [SELECT count(*) FROM symbol WHERE title = ?];
A lock could not be obtained within the time requested;
nested exception is java.sql.SQLTransactionRollbackException:
A lock could not be obtained within the time requested
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:259)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:649)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:684)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:716)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:726)
at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:794)
at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:813)
at com.gis.integration.SymbolRestTests.shouldCreateEntity(SymbolRestTests.java:127)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:316)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:114)
at org.junit.jupiter.engine.descriptor.MethodTestDescriptor.lambda$invokeTestMethod$6(MethodTestDescriptor.java:171)
at org.junit.jupiter.engine.execution.ThrowableCollector.execute(ThrowableCollector.java:40)
at org.junit.jupiter.engine.descriptor.MethodTestDescriptor.invokeTestMethod(MethodTestDescriptor.java:168)
at org.junit.jupiter.engine.descriptor.MethodTestDescriptor.execute(MethodTestDescriptor.java:115)
at org.junit.jupiter.engine.descriptor.MethodTestDescriptor.execute(MethodTestDescriptor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$1(HierarchicalTestExecutor.java:81)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:76)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$1(HierarchicalTestExecutor.java:91)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:76)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$1(HierarchicalTestExecutor.java:91)
at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:76)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:51)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:43)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:137)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:87)
at org.junit.platform.launcher.Launcher.execute(Launcher.java:93)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:61)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.sql.SQLTransactionRollbackException: A lock could not be obtained within the time requested
at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedResultSet.closeOnTransactionError(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedResultSet.movePosition(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedResultSet.next(Unknown Source)
at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:92)
at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:60)
at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:697)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:633)
... 35 more
Caused by: ERROR 40XL1: A lock could not be obtained within the time requested
at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
at org.apache.derby.impl.services.locks.ConcurrentLockSet.lockObject(Unknown Source)
at org.apache.derby.impl.services.locks.ConcurrentLockSet.zeroDurationLockObject(Unknown Source)
at org.apache.derby.impl.services.locks.AbstractPool.zeroDurationlockObject(Unknown Source)
at org.apache.derby.impl.services.locks.ConcurrentPool.zeroDurationlockObject(Unknown Source)
at org.apache.derby.impl.store.raw.xact.RowLocking2nohold.lockRecordForRead(Unknown Source)
at org.apache.derby.impl.store.access.heap.HeapController.lockRow(Unknown Source)
at org.apache.derby.impl.store.access.heap.HeapController.lockRow(Unknown Source)
at org.apache.derby.impl.store.access.btree.index.B2IRowLocking3.lockRowOnPage(Unknown Source)
at org.apache.derby.impl.store.access.btree.index.B2IRowLocking3._lockScanRow(Unknown Source)
at org.apache.derby.impl.store.access.btree.index.B2IRowLockingRR.lockScanRow(Unknown Source)
at org.apache.derby.impl.store.access.btree.BTreeForwardScan.fetchRows(Unknown Source)
at org.apache.derby.impl.store.access.btree.BTreeScan.fetchNextGroup(Unknown Source)
at org.apache.derby.impl.sql.execute.BulkTableScanResultSet.reloadArray(Unknown Source)
at org.apache.derby.impl.sql.execute.BulkTableScanResultSet.getNextRowCore(Unknown Source)
at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(Unknown Source)
at org.apache.derby.impl.sql.execute.ScalarAggregateResultSet.getRowFromResultSet(Unknown Source)
at org.apache.derby.impl.sql.execute.ScalarAggregateResultSet.getNextRowCore(Unknown Source)
at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(Unknown Source)
at org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.getNextRow(Unknown Source)
... 41 more
更新我在persistence.xml中添加了一些特定于DataNucleus的属性（没有结果）：
<?xml version="1.0" encoding="UTF-8" ?>
<persistence version="2.1"
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
persistence_2_1.xsd">
<persistence-unit name="test">
<provider>org.datanucleus.api.jpa.PersistenceProviderImpl</provider>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="datanucleus.schema.autoCreateAll" value="true"/>
<property name="datanucleus.transactionIsolation" value="read-uncommitted"/>
<property name="datanucleus.NontransactionalRead" value="true"/>
<property name="datanucleus.NontransactionalWrite" value="true"/>
</properties>
</persistence-unit>
</persistence>
更新＃2 DEBUG级别的日志输出显示DataNucleus-JPA / JdbcTemplate日志语句（首先是JPA INSERT，然后是JdbcTemplate SELECT COUNT（*））：
2017-06-09 14:56:18.055 DEBUG 9492 --- [ main] DataNucleus.Connection : ManagedConnection(non-enlisted) "org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl@5621a671 [conn=org.apache.derby.impl.jdbc.EmbedConnection@2006fdaa, commitOnRelease=true, closeOnRelease=true, closeOnTxnEnd=true]" is being committed.
2017-06-09 14:56:18.055 DEBUG 9492 --- [ main] DataNucleus.Connection : ManagedConnection(non-enlisted) "org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl@5621a671 [conn=org.apache.derby.impl.jdbc.EmbedConnection@2006fdaa, commitOnRelease=true, closeOnRelease=true, closeOnTxnEnd=true]" closed
2017-06-09 14:56:18.068 DEBUG 9492 --- [ main] DataNucleus.Persistence : Object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" being inserted into table "SYMBOL"
2017-06-09 14:56:18.071 DEBUG 9492 --- [ main] DataNucleus.Connection : ManagedConnection(non-enlisted) "org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl@63a7af06 [conn=null, commitOnRelease=false, closeOnRelease=false, closeOnTxnEnd=true]" opened with isolation level "read-uncommitted" and auto-commit=false
2017-06-09 14:56:18.074 DEBUG 9492 --- [ main] DataNucleus.Transaction : Running enlist operation on resource: org.datanucleus.store.rdbms.ConnectionFactoryImpl$EmulatedXAResource@3d4b45b, error code TMNOFLAGS and transaction: [DataNucleus Transaction, ID=Xid= , enlisted resources=[]]
2017-06-09 14:56:18.076 DEBUG 9492 --- [ main] DataNucleus.Connection : ManagedConnection(enlisted) "org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl@63a7af06 [conn=org.apache.derby.impl.jdbc.EmbedConnection@19d76106, commitOnRelease=false, closeOnRelease=false, closeOnTxnEnd=true]" starting for transaction "Xid= " with flags "0"
2017-06-09 14:56:18.078 DEBUG 9492 --- [ main] DataNucleus.Connection : ManagedConnection added to the pool : "org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl@63a7af06 [conn=org.apache.derby.impl.jdbc.EmbedConnection@19d76106, commitOnRelease=false, closeOnRelease=false, closeOnTxnEnd=true]" for key="org.datanucleus.ExecutionContextImpl@2c47a053" in factory="ConnectionFactory:tx[org.datanucleus.store.rdbms.ConnectionFactoryImpl@204c5ddf]"
2017-06-09 14:56:18.125 DEBUG 9492 --- [ main] DataNucleus.Datastore : Using PreparedStatement "org.datanucleus.store.rdbms.ParamLoggingPreparedStatement@37753b69" for connection "org.apache.derby.impl.jdbc.EmbedConnection@19d76106"
2017-06-09 14:56:18.134 DEBUG 9492 --- [ main] DataNucleus.Datastore.Native : INSERT INTO SYMBOL (ACTIVE,CREATED,EXTRA,GLOBAL_READ,GLOBAL_WRITE,LAST_MODIFIED,TITLE) VALUES (<'Y'>,<2017-06-09>,<null>,<'N'>,<'N'>,<2017-06-09>,<'TEST.CODE.1'>)
2017-06-09 14:56:18.169 DEBUG 9492 --- [ main] DataNucleus.Datastore.Persist : Execution Time = 36 ms (number of rows = 1) on PreparedStatement "org.datanucleus.store.rdbms.ParamLoggingPreparedStatement@37753b69"
2017-06-09 14:56:18.172 DEBUG 9492 --- [ main] DataNucleus.Datastore.Persist : Object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" was inserted in the datastore and was given strategy value of "1"
2017-06-09 14:56:18.179 DEBUG 9492 --- [ main] DataNucleus.Cache : Object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" (id="org.datanucleus.identity.IdentityReference@93fb44") being changed to be referenced by id="com.bp.gis.tardis.entity.SymbolEntity:1" in Level 1 cache
2017-06-09 14:56:18.180 DEBUG 9492 --- [ main] DataNucleus.Cache : Object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" (id="com.bp.gis.tardis.entity.SymbolEntity:1") added to Level 1 cache (loadedFlags="[YYYYYYYYY]")
2017-06-09 14:56:18.180 DEBUG 9492 --- [ main] DataNucleus.Transaction : Object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" (id="org.datanucleus.identity.IdentityReference@93fb44") enlisted in transactional cache is now enlisted using id="com.bp.gis.tardis.entity.SymbolEntity:1"
2017-06-09 14:56:18.181 DEBUG 9492 --- [ main] DataNucleus.Persistence : Insert of object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" is calling insertPostProcessing for field "com.bp.gis.tardis.entity.SymbolEntity.timeSeriesList"
2017-06-09 14:56:18.181 DEBUG 9492 --- [ main] DataNucleus.Datastore : Closing PreparedStatement "org.datanucleus.store.rdbms.ParamLoggingPreparedStatement@37753b69"
2017-06-09 14:56:18.181 DEBUG 9492 --- [ main] DataNucleus.Persistence : Insert of object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" is calling postInsert for field "com.bp.gis.tardis.entity.SymbolEntity.timeSeriesList"
2017-06-09 14:56:18.205 DEBUG 9492 --- [ main] DataNucleus.Persistence : Object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" field "timeSeriesList" is replaced by a SCO wrapper of type "org.datanucleus.store.types.wrappers.backed.List" [cache-values=true, lazy-loading=true, allow-nulls=true]
2017-06-09 14:56:18.207 DEBUG 9492 --- [ main] DataNucleus.Persistence : ExecutionContext.internalFlush() process finished
2017-06-09 14:56:18.218 DEBUG 9492 --- [ main] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL query
2017-06-09 14:56:18.220 DEBUG 9492 --- [ main] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL statement [SELECT count(*) FROM symbol WHERE title = ?]
2017-06-09 14:56:18.250 TRACE 9492 --- [ main] o.s.jdbc.core.StatementCreatorUtils : Setting SQL statement parameter value: column index 1, parameter value [TEST.CODE.1], value class [java.lang.String], SQL type unknown
2017-06-09 14:57:18.298 INFO 9492 --- [ main] o.s.b.f.xml.XmlBeanDefinitionReader : Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]
2017-06-09 14:57:18.390 INFO 9492 --- [ main] o.s.jdbc.support.SQLErrorCodesFactory : SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase, Hana]
MockHttpServletRequest:
HTTP Method = POST
Request URI = /symbols
Parameters = {}
Headers = {}
Handler:
Type = org.springframework.data.rest.webmvc.RepositoryEntityController
Method = public org.springframework.http.ResponseEntity<org.springframework.hateoas.ResourceSupport> org.springframework.data.rest.webmvc.RepositoryEntityController.postCollectionResource(org.springframework.data.rest.webmvc.RootResourceInformation,org.springframework.data.rest.webmvc.PersistentEntityResource,org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler,java.lang.String) throws org.springframework.web.HttpRequestMethodNotSupportedException
Async:
Async started = false
Async result = null
Resolved Exception:
Type = null
ModelAndView:
View name = null
View = null
Model = null
FlashMap:
Attributes = null
MockHttpServletResponse:
Status = 201
Error message = null
Headers = {X-Application-Context=[application:-1], Location=[http://localhost/symbols/0]}
Content type = null
Body =
Forwarded URL = null
Redirected URL = http://localhost/symbols/0
Cookies = []
2017-06-09 14:57:18.424 DEBUG 9492 --- [ main] DataNucleus.Transaction : Transaction rolling back for ExecutionContext org.datanucleus.ExecutionContextImpl@2c47a053
2017-06-09 14:57:18.429 DEBUG 9492 --- [ main] DataNucleus.Lifecycle : Object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" (id="com.bp.gis.tardis.entity.SymbolEntity:1") has a lifecycle change : "P_NEW"->""
2017-06-09 14:57:18.447 DEBUG 9492 --- [ main] DataNucleus.Transaction : Object "com.bp.gis.tardis.entity.SymbolEntity@59c08cf1" (id="com.bp.gis.tardis.entity.SymbolEntity:1") was evicted from transactional cache
2017-06-09 14:57:18.448 DEBUG 9492 --- [ main] DataNucleus.Persistence : Disconnecting com.bp.gis.tardis.entity.SymbolEntity@59c08cf1 from StateManager[pc=com.bp.gis.tardis.entity.SymbolEntity@59c08cf1, lifecycle=P_NEW]
2017-06-09 14:57:18.451 DEBUG 9492 --- [ main] DataNucleus.Cache : Object with id="com.bp.gis.tardis.entity.SymbolEntity:1" being removed from Level 1 cache [current cache size = 1]
2017-06-09 14:57:18.451 DEBUG 9492 --- [ main] DataNucleus.Transaction : Rolling back [DataNucleus Transaction, ID=Xid= , enlisted resources=[org.datanucleus.store.rdbms.ConnectionFactoryImpl$EmulatedXAResource@3d4b45b]]
2017-06-09 14:57:18.452 DEBUG 9492 --- [ main] DataNucleus.Connection : ManagedConnection(enlisted) "org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl@63a7af06 [conn=org.apache.derby.impl.jdbc.EmbedConnection@19d76106, commitOnRelease=false, closeOnRelease=false, closeOnTxnEnd=true]" rolling back for transaction "Xid= "
2017-06-09 14:57:18.461 DEBUG 9492 --- [ main] DataNucleus.Connection : ManagedConnection(non-enlisted) "org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl@63a7af06 [conn=org.apache.derby.impl.jdbc.EmbedConnection@19d76106, commitOnRelease=false, closeOnRelease=false, closeOnTxnEnd=true]" closed
2017-06-09 14:57:18.461 DEBUG 9492 --- [ main] DataNucleus.Connection : ManagedConnection removed from the pool : "org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl@63a7af06 [conn=org.apache.derby.impl.jdbc.EmbedConnection@19d76106, commitOnRelease=false, closeOnRelease=false, closeOnTxnEnd=true]" for key="org.datanucleus.ExecutionContextImpl@2c47a053" in factory="ConnectionFactory:tx[org.datanucleus.store.rdbms.ConnectionFactoryImpl@204c5ddf]"
2017-06-09 14:57:18.462 DEBUG 9492 --- [ main] DataNucleus.Transaction : Transaction rolled back in 38 ms
2017-06-09 14:57:18.462 DEBUG 9492 --- [ main] DataNucleus.Persistence : ExecutionContext "org.datanucleus.ExecutionContextImpl@2c47a053" closed
2017-06-09 14:57:18.463 INFO 9492 --- [ main] o.s.t.c.transaction.TransactionContext : Rolled back transaction for test context [DefaultTestContext@1f6f0fe2 testClass = SymbolRestTests, testInstance = com.bp.gis.tardis.integration.SymbolRestTests@22604c7e, testMethod = shouldCreateEntity@SymbolRestTests, testException = org.springframework.dao.CannotAcquireLockException: PreparedStatementCallback; SQL [SELECT count(*) FROM symbol WHERE title = ?]; A lock could not be obtained within the time requested; nested exception is java.sql.SQLTransactionRollbackException: A lock could not be obtained within the time requested, mergedContextConfiguration = [WebMergedContextConfiguration@3a48c398 testClass = SymbolRestTests, locations = '{}', classes = '{class com.bp.gis.tardis.config.TestDataSourceConfig, class com.bp.gis.tardis.config.TestDataSourceConfig}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{logging.level.DataNucleus=DEBUG, logging.level.com.bp.gis.tardis=TRACE, logging.level.org.springframework.jdbc.core=TRACE, security.basic.enabled=false, org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[[ImportsContextCustomizer@1b4ba615 key = [@org.springframework.boot.autoconfigure.AutoConfigurationPackage(), @org.junit.FixMethodOrder(value=NAME_ASCENDING), @org.springframework.context.annotation.Import(value=[class org.springframework.boot.autoconfigure.AutoConfigurationPackages$Registrar]), @org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase(replace=ANY, connection=DERBY), @org.springframework.boot.autoconfigure.EnableAutoConfiguration(exclude=[], excludeName=[]), @org.springframework.test.context.BootstrapWith(value=class org.springframework.boot.test.context.SpringBootTestContextBootstrapper), @org.junit.jupiter.api.extension.ExtendWith(value=[class org.springframework.test.context.junit.jupiter.SpringExtension]), @org.springframework.transaction.annotation.Transactional(propagation=REQUIRED, rollbackForClassName=[], readOnly=false, isolation=DEFAULT, transactionManager=, noRollbackFor=[], noRollbackForClassName=[], value=, timeout=-1, rollbackFor=[]), @org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc(webDriverEnabled=true, print=DEFAULT, webClientEnabled=true, secure=true, addFilters=true, printOnlyOnFailure=true), @org.springframework.boot.autoconfigure.ImportAutoConfiguration(value=[], exclude=[], classes=[]), @org.junit.platform.commons.meta.API(value=Experimental), @org.springframework.context.annotation.Import(value=[class org.springframework.boot.autoconfigure.ImportAutoConfigurationImportSelector]), @org.springframework.boot.test.autoconfigure.properties.PropertyMapping(value=spring.test.mockmvc, skip=NO), @org.springframework.boot.test.context.SpringBootTest(webEnvironment=MOCK, value=[], properties=[logging.level.DataNucleus=DEBUG, logging.level.com.bp.gis.tardis=TRACE, logging.level.org.springframework.jdbc.core=TRACE, security.basic.enabled=false], classes=[class com.bp.gis.tardis.config.TestDataSourceConfig]), @org.springframework.boot.test.autoconfigure.properties.PropertyMapping(value=spring.test.database, skip=NO), @org.springframework.context.annotation.Import(value=[class org.springframework.boot.autoconfigure.EnableAutoConfigurationImportSelector])]], org.springframework.boot.test.context.SpringBootTestContextCustomizer@702657cc, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@6025e1b6, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@e30f6a3a, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@1ff4931d], resourceBasePath = 'src/main/webapp', contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]]].
更新＃3
日志记录显示了DataNucleus的INSERT，后面是几个日志语句，它们都看起来都是关于实体对象的，然后是
ExecutionContext.internalFlush() process finished
听起来像DataNucleus EntityManager刷新。然后是来自Spring的JdbcTemplate的日志声明，它想要读取JPA插入的内容，这一切都出错了。
答案 0 :(得分：0)
EntityManager用于其测试框架，而包装器只是吞下对entityManager.close()的调用，因此调用不会导致事务完成。
Spring也会在调用entityManager.getTransaction()时抛出错误。
通常根据我对Spring的体验，使用传统的Spring方法工作，例如Spring Data JPA具有完全集成的Hibernate， 不 可以与DataNucleus一起使用。
谢谢你的问题：How to manually force a commit in a @Transactional method?
我从类声明中取出了@Transactional注释，并且没有对测试方法进行任何操作，并使用REQUIRES_NEW调用单独的方法来执行我要测试的REST到数据库的功能。然后在调用之后的原始测试方法中，它全部已提交但未锁定，因此我可以使用Spring的JdbcTemplate来检查结果。
@Test
public void shouldCreateEntity() throws Exception {
String testTitle = "TEST.CODE.1";
String testExtra = "Test for SymbolRestTests.java";
String json = createJsonExample(testTitle, testExtra, true);
log.debug(String.format("JSON==%s", json));
doInNewTransaction(json);
String sql = "SELECT count(*) FROM symbol WHERE title = ?";
int count = jdbcTemplate.queryForObject(
sql, new Object[] { testTitle }, Integer.class);
Assert.assertThat(count, is(1));
}
@Transactional(propagation = Propagation.REQUIRES_NEW)
private void doInNewTransaction(String json) throws Exception {
MockHttpServletRequestBuilder requestBuilder =
post("/symbols").content(json);
mockMvc.perform(requestBuilder)
.andExpect(status().isCreated())
.andExpect(header().string("Location",
containsString("symbols/")));
}