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Hibernate Interface mocking is failing Ex: EventSource #7908

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Hibernate Interface mocking is failing Ex: EventSource#7908
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status=researchtype=defectBug, not working as expected
@DKiran512

Description

@DKiran512
DKiran512
opened on Jul 29, 2025

Guava Version

33.4.8-jre

Description

I am trying to upgrade my application guava 33.2.0-jre to 33.4.8-jre causing bellow issue
mockito-core : 5.2.0
hibernate-core : 6.6.2.Final

Example

org.mockito.exceptions.base.MockitoException: 
Mockito cannot mock this class: interface org.hibernate.event.spi.EventSource.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 20
JVM vendor name    : Oracle Corporation
JVM vendor version : 20+36-2344
JVM name           : Java HotSpot(TM) 64-Bit Server VM
JVM version        : 20+36-2344
JVM info           : mixed mode, sharing
OS name            : Windows 11
OS version         : 10.0


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : java.lang.NullPointerException: Cannot invoke "java.lang.annotation.Annotation.annotationType()" because "annotation" is null
	at test.com.EventSourceMockTest.testMockEventSource(EventBusMockTest.java:18)
	at java.base/java.lang.reflect.Method.invoke(Method.java:578)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.annotation.Annotation.annotationType()" because "annotation" is null
	at net.bytebuddy.description.annotation.AnnotationDescription$ForLoadedAnnotation.<init>(AnnotationDescription.java:657)
	at net.bytebuddy.description.annotation.AnnotationDescription$ForLoadedAnnotation.of(AnnotationDescription.java:692)
	at net.bytebuddy.description.annotation.AnnotationList$ForLoadedAnnotations.get(AnnotationList.java:260)
	at net.bytebuddy.description.annotation.AnnotationList$ForLoadedAnnotations.get(AnnotationList.java:217)
	at net.bytebuddy.description.annotation.AnnotationList$Explicit.get(AnnotationList.java:317)
	at net.bytebuddy.description.annotation.AnnotationList$Explicit.get(AnnotationList.java:274)
	at java.base/java.util.AbstractList$Itr.next(AbstractList.java:373)
	at net.bytebuddy.implementation.attribute.AnnotationAppender$ForTypeAnnotations.ofTypeVariable(AnnotationAppender.java:645)
	at net.bytebuddy.implementation.attribute.AnnotationAppender$ForTypeAnnotations.ofTypeVariable(AnnotationAppender.java:617)
	at net.bytebuddy.implementation.attribute.MethodAttributeAppender$ForInstrumentedMethod.apply(MethodAttributeAppender.java:198)
	at net.bytebuddy.implementation.attribute.MethodAttributeAppender$Compound.apply(MethodAttributeAppender.java:484)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$ForDefinedMethod$WithBody.applyAttributes(TypeWriter.java:723)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$ForDefinedMethod$WithBody.applyBody(TypeWriter.java:713)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$ForDefinedMethod.apply(TypeWriter.java:622)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$AccessBridgeWrapper.apply(TypeWriter.java:1293)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForCreation.create(TypeWriter.java:6043)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:2224)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$UsingTypeWriter.make(DynamicType.java:4055)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase.make(DynamicType.java:3739)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$Delegator.make(DynamicType.java:3991)
	at org.mockito.internal.creation.bytebuddy.SubclassBytecodeGenerator.mockClass(SubclassBytecodeGenerator.java:296)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:78)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:75)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.mockClass(InlineBytecodeGenerator.java:221)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:78)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:75)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMockType(InlineDelegateByteBuddyMockMaker.java:414)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.doCreateMock(InlineDelegateByteBuddyMockMaker.java:373)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMock(InlineDelegateByteBuddyMockMaker.java:352)
	at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMock(InlineByteBuddyMockMaker.java:56)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:99)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:84)
	at org.mockito.Mockito.mock(Mockito.java:2104)
	at org.mockito.Mockito.mock(Mockito.java:2019)
	... 4 more

Expected Behavior

@mock should work for all hibernate Interface mocking with out failing or any changes are required from code side or any other compatibility versions are required please Just suggest here

Actual Behavior

org.mockito.exceptions.base.MockitoException:
Mockito cannot mock this class: interface org.hibernate.event.spi.EventSource.

If you're not sure why you're getting this error, please open an issue on GitHub.

Java : 20
JVM vendor name : Oracle Corporation
JVM vendor version : 20+36-2344
JVM name : Java HotSpot(TM) 64-Bit Server VM
JVM version : 20+36-2344
JVM info : mixed mode, sharing
OS name : Windows 11
OS version : 10.0

You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : java.lang.NullPointerException: Cannot invoke "java.lang.annotation.Annotation.annotationType()" because "annotation" is null
at test.com.EventSourceMockTest.testMockEventSource(EventBusMockTest.java:18)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.annotation.Annotation.annotationType()" because "annotation" is null
at net.bytebuddy.description.annotation.AnnotationDescription$ForLoadedAnnotation.(AnnotationDescription.java:657)
at net.bytebuddy.description.annotation.AnnotationDescription$ForLoadedAnnotation.of(AnnotationDescription.java:692)
at net.bytebuddy.description.annotation.AnnotationList$ForLoadedAnnotations.get(AnnotationList.java:260)
at net.bytebuddy.description.annotation.AnnotationList$ForLoadedAnnotations.get(AnnotationList.java:217)
at net.bytebuddy.description.annotation.AnnotationList$Explicit.get(AnnotationList.java:317)
at net.bytebuddy.description.annotation.AnnotationList$Explicit.get(AnnotationList.java:274)
at java.base/java.util.AbstractList$Itr.next(AbstractList.java:373)
at net.bytebuddy.implementation.attribute.AnnotationAppender$ForTypeAnnotations.ofTypeVariable(AnnotationAppender.java:645)
at net.bytebuddy.implementation.attribute.AnnotationAppender$ForTypeAnnotations.ofTypeVariable(AnnotationAppender.java:617)
at net.bytebuddy.implementation.attribute.MethodAttributeAppender$ForInstrumentedMethod.apply(MethodAttributeAppender.java:198)
at net.bytebuddy.implementation.attribute.MethodAttributeAppender$Compound.apply(MethodAttributeAppender.java:484)
at net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$ForDefinedMethod$WithBody.applyAttributes(TypeWriter.java:723)
at net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$ForDefinedMethod$WithBody.applyBody(TypeWriter.java:713)
at net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$ForDefinedMethod.apply(TypeWriter.java:622)
at net.bytebuddy.dynamic.scaffold.TypeWriter$MethodPool$Record$AccessBridgeWrapper.apply(TypeWriter.java:1293)
at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForCreation.create(TypeWriter.java:6043)
at net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:2224)
at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$UsingTypeWriter.make(DynamicType.java:4055)
at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase.make(DynamicType.java:3739)
at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$Delegator.make(DynamicType.java:3991)
at org.mockito.internal.creation.bytebuddy.SubclassBytecodeGenerator.mockClass(SubclassBytecodeGenerator.java:296)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:78)
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:75)
at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.mockClass(InlineBytecodeGenerator.java:221)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:78)
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:75)
at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMockType(InlineDelegateByteBuddyMockMaker.java:414)
at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.doCreateMock(InlineDelegateByteBuddyMockMaker.java:373)
at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMock(InlineDelegateByteBuddyMockMaker.java:352)
at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMock(InlineByteBuddyMockMaker.java:56)
at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:99)
at org.mockito.internal.MockitoCore.mock(MockitoCore.java:84)
at org.mockito.Mockito.mock(Mockito.java:2104)
at org.mockito.Mockito.mock(Mockito.java:2019)
... 4 more

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Checklist

  • I agree to follow the code of conduct.

  • I can reproduce the bug with the latest version of Guava available.

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