我在 MySQL 上使用 OpenJPA 2.4.0
我有 3 个表 - meeting、location、meeting_location。
meeting_location 是一个连接表，它有 1 个外键到 meeting，2 个外键到 location - main_location_id 和 secondary_location_id。
我使用以下参数初始化表，然后尝试从 meeting 表中删除条目。
id loc_name
------ ------------
0 location 0
1 location 1
2 location 2
3 location 3
4 location 4
5 location 5
6 location 6
7 location 7
8 location 8
9 location 9
id name
------ -----------
1 meeting 1
id meeting_id main_location_id secondary_location_id name
------ ---------- ---------------- --------------------- --------
1 1 4 9 (NULL)
2 1 2 7 (NULL)
3 1 0 5 (NULL)
4 1 3 8 (NULL)
5 1 1 6 (NULL)
当我尝试调用
entityManager.remove(meeting)
我得到一个 org.apache.openjpa.persistence.OptimisticLockException:
org.apache.openjpa.persistence.OptimisticLockException: Optimistic locking errors were detected when flushing to the data store.
The following objects may have been concurrently modified in another transaction:
[com.test.StackOverflowQuestionTest.MeetingLocation-3,
com.test.StackOverflowQuestionTest.MeetingLocation-5,
com.test.StackOverflowQuestionTest.MeetingLocation-1,
com.test.StackOverflowQuestionTest.MeetingLocation-2,
com.test.StackOverflowQuestionTest.MeetingLocation-4]
特此完整测试 list :
SQL:
/*Table structure for table `meeting` */
DROP TABLE IF EXISTS `meeting`;
CREATE TABLE `meeting` (
`id` INT(16) NOT NULL,
`name` VARCHAR(128),
PRIMARY KEY (`id`)
)
ENGINE =INNODB
DEFAULT CHARSET =utf8;
/*Table structure for table `location` */
DROP TABLE IF EXISTS `location`;
CREATE TABLE `location` (
`id` INT(16) NOT NULL,
`loc_name` VARCHAR(128),
PRIMARY KEY (`id`)
)
ENGINE =INNODB
DEFAULT CHARSET =utf8;
/*Table structure for table `meeting_location` */
DROP TABLE IF EXISTS `meeting_location`;
CREATE TABLE `meeting_location` (
`id` INT(16) NOT NULL AUTO_INCREMENT,
`meeting_id` INT(16) NOT NULL,
`main_location_id` INT(16) NOT NULL,
`secondary_location_id` INT(16) NULL,
`name` VARCHAR(128),
PRIMARY KEY (`id`),
CONSTRAINT `meeting_location_ibfk_1` FOREIGN KEY (`meeting_id`) REFERENCES `meeting` (`id`)
ON DELETE CASCADE
ON UPDATE CASCADE
,
CONSTRAINT `meeting_location_ibfk_2` FOREIGN KEY (`main_location_id`) REFERENCES `location` (`id`)
ON DELETE CASCADE
ON UPDATE CASCADE
,
CONSTRAINT `meeting_location_ibfk_3` FOREIGN KEY (`secondary_location_id`) REFERENCES `location` (`id`)
ON DELETE CASCADE
ON UPDATE CASCADE
)
ENGINE =INNODB
DEFAULT CHARSET =utf8;
实体:
@Entity
@Table(name="location")
public class Location {
@Id
@Column(columnDefinition="INT")
private int id;
@Basic
@Column(name="loc_name", length=128)
private String locName;
public Location() {
}
public Location(int id) {
this.id = id;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getLocName() {
return locName;
}
public void setLocName(String locName) {
this.locName = locName;
}
}
@Entity
@Table(name="meeting")
public class Meeting {
@Id
@Column(columnDefinition="INT")
private int id;
@OneToMany(targetEntity=MeetingLocation.class, mappedBy="meeting", cascade=CascadeType.ALL)
private Set meetingLocations = new HashSet();
@Basic
@Column(length=128)
private String name;
public Meeting() {
}
public Meeting(int id) {
this.id = id;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Set getMeetingLocations() {
return meetingLocations;
}
public void setMeetingLocations(Set meetingLocations) {
this.meetingLocations = meetingLocations;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
@Entity
@Table(name="meeting_location")
public class MeetingLocation {
@ManyToOne(fetch=FetchType.LAZY, cascade=CascadeType.ALL)
@JoinColumn(name="main_location_id", columnDefinition="INT", nullable=false)
private Location mainLocation;
@ManyToOne(fetch=FetchType.LAZY, cascade=CascadeType.ALL)
@JoinColumn(name="secondary_location_id", columnDefinition="INT")
private Location secondaryLocation;
@ManyToOne(fetch=FetchType.LAZY, cascade=CascadeType.ALL)
@JoinColumn(name="meeting_id", columnDefinition="INT", nullable=false)
private Meeting meeting;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(columnDefinition="INT")
private int id;
@Basic
@Column(length=128)
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Location getMainLocation() {
return mainLocation;
}
public void setMainLocation(Location mainLocation) {
this.mainLocation = mainLocation;
}
public Location getSecondaryLocation() {
return secondaryLocation;
}
public void setSecondaryLocation(Location secondaryLocation) {
this.secondaryLocation = secondaryLocation;
}
public MeetingLocation() {
}
public MeetingLocation(int id) {
this.id = id;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Meeting getMeeting() {
return meeting;
}
public void setMeeting(Meeting meeting) {
this.meeting = meeting;
}
}
单元测试:
@ManagedBean
public class SOQuestionTest extends BaseTest {
private static final Logger LOGGER = Logger.getInstance(LogCategory.OPENEJB_STARTUP_CONFIG, SOQuestionTest.class);
public static final int MEETING_ID = 1;
public static final String MEETING_1 = "meeting 1";
@Resource
protected UserTransaction transaction;
@Inject
private EndUnitDao<EntityManager> alertDao;
@PersistenceContext(name = "euComm-pu")
private EntityManager entityManager;
@Test
public void SOExampleTest() {
try {
transaction.begin();
Meeting meeting = new Meeting();
meeting.setName(MEETING_1);
meeting.setId(MEETING_ID);
int mainLocationsSize = 5;
List<Location> locations = new ArrayList<Location>();
for (int i = 0; i < (mainLocationsSize * 2); i++) {
Location location = new Location();
location.setLocName("location " + i);
location.setId(i);
locations.add(location);
entityManager.persist(location);
}
for (int i = 0; i < mainLocationsSize; i++) {
MeetingLocation meetingLocation = new MeetingLocation();
meetingLocation.setMainLocation(locations.get(i));
meetingLocation.setSecondaryLocation(locations.get(mainLocationsSize + i));
meetingLocation.setMeeting(meeting);
meeting.getMeetingLocations().add(meetingLocation);
}
entityManager.persist(meeting);
this.transaction.commit();
Meeting meeting1 = entityManager.find(Meeting.class, MEETING_ID);
Assert.assertEquals(MEETING_1, meeting1.getName());
this.transaction.begin();
Meeting meeting2 = entityManager.find(Meeting.class, MEETING_ID);
//Here I get the OptimisticLockException:
entityManager.remove(meeting2);
this.transaction.commit();
Meeting meeting3 = entityManager.find(Meeting.class, MEETING_ID);
Assert.assertNull(meeting3);
}
catch (Exception e) {
Assert.fail(e.getMessage());
}
}
}
- BaseTest 是我们用来管理事务、日志记录和其他常见任务的实用程序类。
日志:
5057 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1491251091 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 0]
5057 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5058 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1280539125 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 5]
5058 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5058 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 323248196 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 1]
5059 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [1 ms] spent
5059 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1301992318 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 6]
5059 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5060 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 2052728503 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 4]
5060 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5060 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1414992442 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 9]
5061 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5061 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1812214031 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 2]
5061 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5062 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 760487425 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 7]
5062 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5062 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 518757980 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 3]
5063 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [1 ms] spent
5063 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 779932859 SELECT t0.loc_name FROM location t0 WHERE t0.id = ? [params=(int) 8]
5063 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5064 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 604225989 DELETE FROM location WHERE id = ? [params=(int) 0]
5064 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5065 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1653474307 DELETE FROM location WHERE id = ? [params=(int) 5]
5065 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5065 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 4677559 DELETE FROM meeting_location WHERE id = ? [params=(int) 3]
5065 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5070 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1283267007 DELETE FROM location WHERE id = ? [params=(int) 1]
5073 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [3 ms] spent
5073 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1004931143 DELETE FROM location WHERE id = ? [params=(int) 6]
5077 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [4 ms] spent
5078 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1040066455 DELETE FROM meeting_location WHERE id = ? [params=(int) 5]
5086 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [8 ms] spent
5086 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 885018785 DELETE FROM location WHERE id = ? [params=(int) 4]
5087 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [1 ms] spent
5087 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 851514585 DELETE FROM location WHERE id = ? [params=(int) 9]
5088 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [1 ms] spent
5088 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1158016054 DELETE FROM meeting_location WHERE id = ? [params=(int) 1]
5088 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5088 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 2065936034 DELETE FROM location WHERE id = ? [params=(int) 2]
5089 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [1 ms] spent
5090 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1432547991 DELETE FROM location WHERE id = ? [params=(int) 7]
5092 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [2 ms] spent
5092 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 49365994 DELETE FROM meeting_location WHERE id = ? [params=(int) 2]
5094 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [2 ms] spent
5094 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 429407697 DELETE FROM location WHERE id = ? [params=(int) 3]
5095 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [1 ms] spent
5096 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 2020466851 DELETE FROM location WHERE id = ? [params=(int) 8]
5106 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [10 ms] spent
5107 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 520296852 DELETE FROM meeting_location WHERE id = ? [params=(int) 4]
5107 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5107 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 549803608 DELETE FROM meeting WHERE id = ? [params=(int) 1]
5108 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [1 ms] spent
Aug 31, 2015 12:45:11 PM org.apache.geronimo.transaction.manager.TransactionImpl beforeCompletion
WARNING: Unexpected exception from beforeCompletion; transaction will roll back
<openjpa-2.4.0-nonfinal-1598334-r422266:1599166 nonfatal store error> org.apache.openjpa.persistence.OptimisticLockException: Optimistic locking errors were detected when flushing to the data store. The following objects may have been concurrently modified in another transaction: [com.test.StackOverflowQuestionTest.MeetingLocation-3, com.test.StackOverflowQuestionTest.MeetingLocation-5, com.test.StackOverflowQuestionTest.MeetingLocation-1, com.test.StackOverflowQuestionTest.MeetingLocation-2, com.test.StackOverflowQuestionTest.MeetingLocation-4]
at org.apache.openjpa.kernel.BrokerImpl.newFlushException(BrokerImpl.java:2359)
at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:2207)
at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:2105)
at org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:2023)
at org.apache.geronimo.transaction.manager.TransactionImpl.beforeCompletion(TransactionImpl.java:527)
at org.apache.geronimo.transaction.manager.TransactionImpl.beforeCompletion(TransactionImpl.java:512)
at org.apache.geronimo.transaction.manager.TransactionImpl.beforePrepare(TransactionImpl.java:413)
at org.apache.geronimo.transaction.manager.TransactionImpl.commit(TransactionImpl.java:262)
at org.apache.geronimo.transaction.manager.TransactionManagerImpl.commit(TransactionManagerImpl.java:252)
at org.apache.openejb.core.CoreUserTransaction.commit(CoreUserTransaction.java:67)
at com.test.shared.commons.BaseTest$Tx.tx(BaseTest.java:121)
at com.test.StackOverflowQuestionTest.SOQuestionTest.SOExampleTest(SOQuestionTest.java:106)
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:483)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1198)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1123)
at org.testng.TestNG.run(TestNG.java:1031)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:125)
Caused by: <openjpa-2.4.0-nonfinal-1598334-r422266:1599166 nonfatal store error> org.apache.openjpa.persistence.OptimisticLockException: An optimistic lock violation was detected when flushing object instance "com.test.StackOverflowQuestionTest.MeetingLocation-3" to the data store. This indicates that the object was concurrently modified in another transaction.
FailedObject: com.test.StackOverflowQuestionTest.MeetingLocation-3
at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flushAndUpdate(PreparedStatementManagerImpl.java:124)
at org.apache.openjpa.jdbc.kernel.BatchingPreparedStatementManagerImpl.flushAndUpdate(BatchingPreparedStatementManagerImpl.java:79)
at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flushInternal(PreparedStatementManagerImpl.java:100)
at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flush(PreparedStatementManagerImpl.java:88)
at org.apache.openjpa.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:550)
at org.apache.openjpa.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:120)
at org.apache.openjpa.jdbc.kernel.BatchingConstraintUpdateManager.flush(BatchingConstraintUpdateManager.java:59)
at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:104)
at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:77)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.flush(JDBCStoreManager.java:732)
at org.apache.openjpa.kernel.DelegatingStoreManager.flush(DelegatingStoreManager.java:131)
... 36 more
NestedThrowables:
<openjpa-2.4.0-nonfinal-1598334-r422266:1599166 nonfatal store error> org.apache.openjpa.persistence.OptimisticLockException: An optimistic lock violation was detected when flushing object instance "com.test.StackOverflowQuestionTest.MeetingLocation-5" to the data store. This indicates that the object was concurrently modified in another transaction.
FailedObject: com.test.StackOverflowQuestionTest.MeetingLocation-5
at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flushAndUpdate(PreparedStatementManagerImpl.java:124)
at org.apache.openjpa.jdbc.kernel.BatchingPreparedStatementManagerImpl.flushAndUpdate(BatchingPreparedStatementManagerImpl.java:79)
at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flushInternal(PreparedStatementManagerImpl.java:100)
at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flush(PreparedStatementManagerImpl.java:88)
at org.apache.openjpa.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:550)
at org.apache.openjpa.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:120)
at org.apache.openjpa.jdbc.kernel.BatchingConstraintUpdateManager.flush(BatchingConstraintUpdateManager.java:59)
at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:104)
at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:77)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.flush(JDBCStoreManager.java:732)
at org.apache.openjpa.kernel.DelegatingStoreManager.flush(DelegatingStoreManager.java:131)
at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:2207)
at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:2105)
at org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:2023)
at org.apache.geronimo.transaction.manager.TransactionImpl.beforeCompletion(TransactionImpl.java:527)
at org.apache.geronimo.transaction.manager.TransactionImpl.beforeCompletion(TransactionImpl.java:512)
at org.apache.geronimo.transaction.manager.TransactionImpl.beforePrepare(TransactionImpl.java:413)
at org.apache.geronimo.transaction.manager.TransactionImpl.commit(TransactionImpl.java:262)
at org.apache.geronimo.transaction.manager.TransactionManagerImpl.commit(TransactionManagerImpl.java:252)
at org.apache.openejb.core.CoreUserTransaction.commit(CoreUserTransaction.java:67)
at com.test.shared.commons.BaseTest$Tx.tx(BaseTest.java:121)
at com.test.StackOverflowQuestionTest.SOQuestionTest.SOExampleTest(SOQuestionTest.java:106)
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:483)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1198)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1123)
at org.testng.TestNG.run(TestNG.java:1031)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:125)
最佳答案
来自你的日志:
5064 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 604225989 DELETE FROM location WHERE id = ? [params=(int) 0]
5064 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5065 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 1653474307 DELETE FROM location WHERE id = ? [params=(int) 5]
5065 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> [0 ms] spent
5065 test-pu TRACE [main] openjpa.jdbc.SQL - <t 1394557075, conn 1722642791> executing prepstmnt 4677559 DELETE FROM meeting_location WHERE id = ? [params=(int) 3]
根本原因是
cascade=CascadeType.ALL
问题是当你运行
entityManager.remove(meeting2);
您实际上是在尝试删除与其关联的所有位置。 因为 meeting2 有两个 session 地点，它应该失败(即使第二个 session 地点没有绑定(bind)到另一个 session !)。 JPA 通过看到您正在尝试删除您没有 FETCH 的内容来检测，这就是它抛出(可能定义错误)OptimisticLockException 的原因。
一个可能的解决方案是使用另一个不使用 DELETE 的级联类型。
如果您不想删除位置，请使用 cascadetype.PERSIST 或 DETACH。
关于java - 在 openJPA mySQL 中删除实体时出现 OptimisticLockException，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32309295/