Alexander Schwartz ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=6267ec4... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNWJjNTdjOWJl... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16423?atlOrigin=eyJpIjoiNWJjNT... ) HHH-16423 ( https://hibernate.atlassian.net/browse/HHH-16423?atlOrigin=eyJpIjoiNWJjNT... ) LazyInitializationException when calling em.refresh() on entity with lazy and eager children ( https://hibernate.atlassian.net/browse/HHH-16423?atlOrigin=eyJpIjoiNWJjNT... ) Issue Type: Bug Affects Versions: 6.2.0 Assignee: Unassigned Components: hibernate-core Created: 03/Apr/2023 05:13 AM Environment: Linux / H2 (probably independent of from the database) Priority: Major Reporter: Alexander Schwartz ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=6267ec4... ) The problem can be reproduced as follows: * given: entity with two collections, one lazy, the other eager * fetch an entity * refresh the entity * access the lazy collection → LazyInitializationException as the collection doesn’t contain a session (see below) Reproducer: https://github.com/ahus1/hibernate-test-case-templates/tree/kc-16069-lazy... Chat with the hibernate team: https://hibernate.zulipchat.com/#narrow/stream/132096-hibernate-user/topi... Issue from the Keycloak team: https://github.com/keycloak/keycloak/issues/19069#issuecomment-1494185743 org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.hibernate.bugs.RealmEntity.components: could not initialize proxy - no Session at org.hibernate.collection.spi.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:635) at org.hibernate.collection.spi.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:218) at org.hibernate.collection.spi.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:148) at org.hibernate.collection.spi.PersistentSet.size(PersistentSet.java:151) at org.hibernate.bugs.ORMUnitTestCase.hhh123Test(ORMUnitTestCase.java:98) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56) at org.hibernate.testing.junit4.ExtendedFrameworkMethod.invokeExplosively(ExtendedFrameworkMethod.java:45) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293) at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java) at java.base/java.lang.Thread.run(Thread.java:829) ( https://hibernate.atlassian.net/browse/HHH-16423#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16423#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100221- sha1:d541bce )