Adding content to s3-storage fails with http 500 when using spring boot 3.2.1+

[NielsCW]

Describe the bug
When adding uploading content to an entity the server responds with a 500 Internal Server Error
This only occurs when using s3-storage with the following spring-boot versions:

• 3.1.7+
• 3.2.1+

Detailed stack trace of the server:

java.lang.NullPointerException: null
	at java.base/java.lang.Class.isAssignableFrom(Native Method) ~[na:na]
	at org.springframework.content.commons.utils.PlacementServiceImpl$ContentPropertyInfoConverterAdapter.matches(PlacementServiceImpl.java:140) ~[spring-content-commons-3.0.9.jar:na]
	at org.springframework.core.convert.support.GenericConversionService$ConvertersForPair.getConverter(GenericConversionService.java:629) ~[spring-core-6.1.4.jar:6.1.4]
	at org.springframework.core.convert.support.GenericConversionService$Converters.getRegisteredConverter(GenericConversionService.java:526) ~[spring-core-6.1.4.jar:6.1.4]
	at org.springframework.core.convert.support.GenericConversionService$Converters.find(GenericConversionService.java:510) ~[spring-core-6.1.4.jar:6.1.4]
	at org.springframework.core.convert.support.GenericConversionService.getConverter(GenericConversionService.java:233) ~[spring-core-6.1.4.jar:6.1.4]
	at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:180) ~[spring-core-6.1.4.jar:6.1.4]
	at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:165) ~[spring-core-6.1.4.jar:6.1.4]
	at internal.org.springframework.content.s3.store.DefaultS3StoreImpl.getResource(DefaultS3StoreImpl.java:145) ~[spring-content-s3-3.0.9.jar:na]
	at internal.org.springframework.content.s3.store.DefaultS3StoreImpl.getResource(DefaultS3StoreImpl.java:124) ~[spring-content-s3-3.0.9.jar:na]
	at internal.org.springframework.content.s3.store.DefaultS3StoreImpl.setContent(DefaultS3StoreImpl.java:362) ~[spring-content-s3-3.0.9.jar:na]
	at internal.org.springframework.content.s3.store.DefaultS3StoreImpl.setContent(DefaultS3StoreImpl.java:334) ~[spring-content-s3-3.0.9.jar:na]
	at internal.org.springframework.content.commons.store.factory.StoreImpl.lambda$setContent$3(StoreImpl.java:105) ~[spring-content-commons-3.0.9.jar:na]
	at internal.org.springframework.content.commons.store.factory.StoreImpl.internalSetContent(StoreImpl.java:160) ~[spring-content-commons-3.0.9.jar:na]
	at internal.org.springframework.content.commons.store.factory.StoreImpl.setContent(StoreImpl.java:103) ~[spring-content-commons-3.0.9.jar:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Unknown Source) ~[na:na]
	at internal.org.springframework.content.commons.store.factory.StoreMethodInterceptor.invoke(StoreMethodInterceptor.java:74) ~[spring-content-commons-3.0.9.jar:na]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) ~[spring-aop-6.1.4.jar:6.1.4]
	at internal.org.springframework.content.commons.store.factory.StoreExceptionTranslatorInterceptor.invoke(StoreExceptionTranslatorInterceptor.java:23) ~[spring-content-commons-3.0.9.jar:na]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) ~[spring-aop-6.1.4.jar:6.1.4]
	...

Additional context
See also failing PR of dependabot

[tgeens]

Looking through the Spring Boot 3.2.1 release notes, I encountered this possibly related change: spring-projects/spring-boot#38734 ?

[paulcwarren]

I think that I have reproduced this issue. Investigating.