IllegalArgumentException with Objet Caching & Lazy byte[]

Hibernate ORM
1

I’m running Hibernate 5.2.15

When Object has
@Cache(usage = CacheConcurrencyStrategy.READ_ONLY)
and property

@Lob
@Basic(fetch = FetchType.LAZY)
private byte[] file;

(also tried with @LazyGroup( “binaryGroup” ))

Results in 
java.lang.IllegalArgumentException: Value was not an array [org.hibernate.bytecode.enhance.spi.LazyPropertyInitializer$1]
	at org.hibernate.type.descriptor.java.ArrayMutabilityPlan.deepCopyNotNull(ArrayMutabilityPlan.java:23)
	at org.hibernate.type.descriptor.java.MutableMutabilityPlan.deepCopy(MutableMutabilityPlan.java:35)
	at org.hibernate.type.descriptor.java.MutableMutabilityPlan.assemble(MutableMutabilityPlan.java:30)
	at org.hibernate.type.AbstractStandardBasicType.assemble(AbstractStandardBasicType.java:323)
	at org.hibernate.persister.entity.AbstractEntityPersister.initializeLazyPropertiesFromCache(AbstractEntityPersister.java:1153)
	at org.hibernate.persister.entity.AbstractEntityPersister.initializeLazyProperty(AbstractEntityPersister.java:994)
	at org.hibernate.bytecode.enhance.spi.interceptor.LazyAttributeLoadingInterceptor$1.doWork(LazyAttributeLoadingInterceptor.java:105)
	at org.hibernate.bytecode.enhance.spi.interceptor.Helper.performWork(Helper.java:97)
	at org.hibernate.bytecode.enhance.spi.interceptor.LazyAttributeLoadingInterceptor.loadAttribute(LazyAttributeLoadingInterceptor.java:76)
	at org.hibernate.bytecode.enhance.spi.interceptor.LazyAttributeLoadingInterceptor.fetchAttribute(LazyAttributeLoadingInterceptor.java:72)
	at org.hibernate.bytecode.enhance.spi.interceptor.LazyAttributeLoadingInterceptor.intercept(LazyAttributeLoadingInterceptor.java:61)
	at org.hibernate.bytecode.enhance.spi.interceptor.LazyAttributeLoadingInterceptor.readObject(LazyAttributeLoadingInterceptor.java:296)
	at Classname.$$_hibernate_read_file(Classname.java)

Looking at the source code it looks like AbstractEntityPersister.java:994 will try to pull the value from the cache but there is not a check to see if the property value was initialized before the cache entry was created.

2

Sound like a bug. Create a replicating test case and open a Jira issue.

3

Thanks. I created an issue with a test case. https://hibernate.atlassian.net/browse/HHH-12449