Why this:

[dbettoni]

look at this code:

@Stateless
 @Remote
 public class SMSBAccountManager implements AccountManager {

 @PersistenceContext //(unitName="smsboss_core")
 protected EntityManager em;

 ...
 ...

 public Set<Account> getAccounts( int providerId ) {
 Provider p = em.find( Provider.class, providerId );
 Set<Account> set = p.getAccounts();
 for( Account a : set ){
 System.out.println("@@@@ s="+a);
 }
 return p.getAccounts();
 }
 }

when I run my remote junit test and I scan the Set returned by the method getAccounts(...)
I haven't any problems
but if I drop the useless code:

public Set<Account> getAccounts( int providerId ) {
 Provider p = em.find( Provider.class, providerId );
 //Set<Account> set = p.getAccounts();
 //for( Account a : set ){
 // System.out.println("@@@@ s="+a);
 //}
 return p.getAccounts();
 }

my test fail with exception:

[junit] Testsuite: it.menhir.j2ee.smsboss.ejb3.core.TestSuite
[junit] Tests run: 3, Failures: 0, Errors: 1, Time elapsed: 3,054 sec
[junit] ------------- Standard Error -----------------
[junit] 22-set-2006 15.56.46 org.hibernate.LazyInitializationException
[junit] GRAVE: failed to lazily initialize a collection of role: it.menhir.j2ee.smsboss.ejb3.core.entity.Provider.accounts, no session or session was closed
[junit] org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: it.menhir.j2ee.smsboss.ejb3.core.entity.Provider.accounts, no session or session was closed
[junit] at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
[junit] at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
[junit] at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)
[junit] at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
[junit] at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:138)
[junit] at it.menhir.j2ee.smsboss.ejb3.core.AccountWithMessageTest.addMessages(AccountWithMessageTest.java:55)
[junit] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[junit] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[junit] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[junit] at java.lang.reflect.Method.invoke(Method.java:585)
[junit] at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
[junit] at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
[junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
[junit] at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
[junit] at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
[junit] at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71)
[junit] at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
[junit] at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
[junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
[junit] at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
[junit] at org.junit.internal.runners.CompositeRunner.run(CompositeRunner.java:29)
[junit] at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
[junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
[junit] at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
[junit] at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:32)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
[junit] ------------- ---------------- ---------------
[junit] Testcase: addMessages(it.menhir.j2ee.smsboss.ejb3.core.AccountWithMessageTest): Caused an ERROR
[junit] failed to lazily initialize a collection of role: it.menhir.j2ee.smsboss.ejb3.core.entity.Provider.accounts, no session or session was closed
[junit] org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: it.menhir.j2ee.smsboss.ejb3.core.entity.Provider.accounts, no session or session was closed
[junit] at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
[junit] at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
[junit] at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)
[junit] at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
[junit] at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:138)
[junit] at it.menhir.j2ee.smsboss.ejb3.core.AccountWithMessageTest.addMessages(AccountWithMessageTest.java:55)
[junit] at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
[junit] at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
[junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
[junit] at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
[junit] at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
[junit] at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71)
[junit] at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
[junit] at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
[junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
[junit] at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
[junit] at org.junit.internal.runners.CompositeRunner.run(CompositeRunner.java:29)
[junit] at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
[junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
[junit] at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
[junit] at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:32)


does someone know to make sense to this behavior?