Error accessing field by reflection for persistent property

[djnalluri]

Problem

I have been getting the following error in our regression tests after recently upgrading a project to Quarkus 3.27. This is using version 3.1.3.Final of this project. Some lines have been redacted or renamed with a representative alternative.

org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [com.example.EmbeddedKey com.example.AbstractRecord.key] by reflection for persistent property [com.example.ExampleRecord#key] : org.hibernate.reactive.session.impl.ReactiveStatelessSessionImpl@2002cffe

	at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:55)
	at org.hibernate.metamodel.mapping.internal.EmbeddedIdentifierMappingImpl.getIdentifier(EmbeddedIdentifierMappingImpl.java:90)
	at org.hibernate.reactive.metamodel.mapping.internal.ReactiveEmbeddedIdentifierMappingImpl.getIdentifier(ReactiveEmbeddedIdentifierMappingImpl.java:92)
	at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:4325)
	at org.hibernate.mapping.Component$StandardGenerationContextLocator.locateGenerationContext(Component.java:766)
	at org.hibernate.reactive.id.impl.ReactiveCompositeNestedGeneratedValueGenerator.generate(ReactiveCompositeNestedGeneratedValueGenerator.java:65)
	at org.hibernate.reactive.id.impl.ReactiveGeneratorWrapper.generate(ReactiveGeneratorWrapper.java:51)
	at org.hibernate.reactive.session.impl.ReactiveStatelessSessionImpl.generateIdForInsert(ReactiveStatelessSessionImpl.java:442)
	at org.hibernate.reactive.session.impl.ReactiveStatelessSessionImpl.generatedIdBeforeInsert(ReactiveStatelessSessionImpl.java:421)
	at org.hibernate.reactive.session.impl.ReactiveStatelessSessionImpl.reactiveInsert(ReactiveStatelessSessionImpl.java:356)
	at org.hibernate.reactive.session.impl.ReactiveStatelessSessionImpl.reactiveInsert(ReactiveStatelessSessionImpl.java:297)
	at org.hibernate.reactive.util.impl.CompletionStages.lambda$loop$3(CompletionStages.java:195)
	at org.hibernate.reactive.util.impl.CompletionStages.lambda$loop$8(CompletionStages.java:483)
	at org.hibernate.reactive.util.impl.CompletionStages$ArrayLoop.next(CompletionStages.java:557)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline.lambda$asyncWhile$1(AsyncTrampoline.java:215)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline$TrampolineInternal.unroll(AsyncTrampoline.java:121)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline$TrampolineInternal.trampoline(AsyncTrampoline.java:102)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline.asyncWhile(AsyncTrampoline.java:197)
	at org.hibernate.reactive.util.async.impl.AsyncTrampoline.asyncWhile(AsyncTrampoline.java:215)
	at org.hibernate.reactive.util.impl.CompletionStages.loop(CompletionStages.java:484)
	at org.hibernate.reactive.util.impl.CompletionStages.loop(CompletionStages.java:455)
	at org.hibernate.reactive.util.impl.CompletionStages.loop(CompletionStages.java:195)
	at org.hibernate.reactive.session.impl.ReactiveStatelessSessionImpl.reactiveInsertAll(ReactiveStatelessSessionImpl.java:703)
	at org.hibernate.reactive.mutiny.impl.MutinyStatelessSessionImpl.lambda$insertAll$5(MutinyStatelessSessionImpl.java:180)
<!-- Omitted the long async/Mutiny chain -->
Caused by: java.lang.IllegalArgumentException: Can not get com.example.EmbeddedKey field com.example.AbstractRecord.key on org.hibernate.reactive.session.impl.ReactiveStatelessSessionImpl
	at java.base/java.lang.reflect.Field.get(Field.java:444)
	at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:51)
	... 114 more

Analysis

After stepping through with my debugger, I've narrowed it down to this line in ReactiveStatelessSessionImpl. The session implementation itself is being passed in as the entity with the actual entity being discarded. This inevitably fails when it starts trying to lookup field values. Looking at main, this appears to still be the case.

[DavideD]

Hi, wouldn't you be able to provide a test case? Without knowing the mapping involved and the kind of operations you are executing, I don't know if we can help.

[djnalluri]

I've got a minimal reproducer together. The first commit breaks the tests in the class by attempting to insert using a stateless session. The bug gets triggered any time an insert happens with an embedded id in a stateless session. The second commit provides the fix on the line I mentioned above. All tests in the project pass once again with the fix applied. I'd be willing to put together a separate test for this case if I could get some guidance on where it should go.

main...djnalluri:hibernate-reactive:reproduce-2666

[DavideD]

I see now, thanks. I will look into it