오류 LazyInitializationException이 (봄)

Question

나는이 오류납니다 최대 절전 모드와 쿼리를 가져올 때

org.hibernate.LazyInitializationException: could not initialize proxy - no Session 
    at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:167) 
    at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:215) 
    at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190) 
    at com.javalabs.web.dao.Task_$$_javassist_1.toString(Task_$$_javassist_1.java) 
    at java.lang.String.valueOf(Unknown Source) 
    at java.lang.StringBuilder.append(Unknown Source) 
    at com.javalabs.web.dao.TaskAction.toString(TaskAction.java:175) 
    at java.lang.String.valueOf(Unknown Source) 
    at java.lang.StringBuilder.append(Unknown Source) 
    at java.util.AbstractCollection.toString(Unknown Source) 
    at java.lang.String.valueOf(Unknown Source) 
    at org.junit.Assert.format(Assert.java:752) 
    at org.junit.Assert.failNotEquals(Assert.java:743) 
    at org.junit.Assert.assertEquals(Assert.java:118) 
    at com.javalabs.web.test.tests.TaskActionDaoTests.testTaskActionCreate(TaskActionDaoTests.java:120) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
    at java.lang.reflect.Method.invoke(Unknown Source) 
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) 
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) 
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) 
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) 
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74) 
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83) 
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88) 
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) 
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) 
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) 
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) 
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) 
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) 
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71) 
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) 
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) 
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) 

오류가 발생 JUnit 테스트

@Test 
public void testTaskActionCreate() { 
    taskPriorityDao.saveOrUpdate(priority); 
    taskCategoryDao.saveOrUpdate(category); 
    taskStateDao.saveOrUpdate(state); 
    userDao.saveOrUpdate(user); 

    Date rightnow = Calendar.getInstance().getTime(); 

    Task t1 = new Task("My first task", "This is a task", rightnow, 
      rightnow, category, priority, state, user, user, "okey", 0); 

    TaskAction ta1 = new TaskAction(t1, rightnow, "Task action 1", 
      "Task action 1 description", user); 
    TaskAction ta2 = new TaskAction(t1, rightnow, "Task action 2", 
      "Task action 2 description", user); 
    TaskAction ta3 = new TaskAction(t1, rightnow, "Task action 3", 
      "Task action 3 description", user); 
    TaskAction ta4 = new TaskAction(t1, rightnow, "Task action 4", 
      "Task action 4 description", user); 

    t1.addAction(ta1); 
    t1.addAction(ta2); 
    t1.addAction(ta3); 
    t1.addAction(ta4); 

    taskDao.save(t1); 

    Task t2 = taskDao.get(t1.getIdTask()); 
    assertEquals("Should be 4 taskActions with getAllTaskActions.", 4, 
      taskActionDao.getAllTaskActions(t2.getIdTask())); 
} 

TaskActionDao.java

,210

TaskAction.java

@Entity 
@Table(name = "t_taskaction") 
public class TaskAction { 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    @Column(name = "idTaskAction") 
    private long idTaskAction; 
    @ManyToOne(fetch = FetchType.LAZY) 
    @JoinColumn(name = "idTask", nullable = false) 
    private Task task; 
    private Date date; 
    private String actionname; 
    private String description; 
    private int duration; 
    @ManyToOne 
    @JoinColumn(name = "idUser", nullable = false) 
    private User user; 
    private Date timestamp; 
     ... 

Task.java

@Entity 
@Table(name = "t_task") 
public class Task { 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    @Column(name = "idTask") 
    private long idTask; 
    ... 

Answer 1

그것은 당신이 LazyInitializationException를 얻을 의미가 있습니다. toString을 암시 적으로 TaskAction에 사용하고 있으므로 지연로드되는 task에 액세스하려고 시도하고 있습니다.

시도해 보면 assertEquals("Should be 4 taskActions with getAllTaskActions.", 4, taskActionDao.getAllTaskActions(t2.getIdTask()).size());