InaccessibleObjectException Unable to make field private transient java.math.BigInteger com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl.orig_eon accessible

[salnikovp0]

Using Java17 with latest spring-boot 2.7.2

added the dependency of

org.springframework.boot
spring-boot-starter-data-mongodb
When trying to use mongoTemplate with find and replace, created the following Document POJO that use the LocalDateTime.
After that test i get the following error with stacktrace

ERROR c.e.s.c.w.e.h.BaseRestControllerAdvice - Caught Internal Server Error: The server encountered an internal error and was unable to complete your request - name=java.lang.reflect.InaccessibleObjectException, code=Unauthorized, message=Unable to make field private transient java.math.BigInteger com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl.orig_eon accessible: module java.xml does not "opens com.sun.org.apache.xerces.internal.jaxp.datatype" to unnamed module @32c5f66d
java.lang.reflect.InaccessibleObjectException: Unable to make field private transient java.math.BigInteger com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl.orig_eon accessible: module java.xml does not "opens com.sun.org.apache.xerces.internal.jaxp.datatype" to unnamed module @32c5f66d
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
	at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
	at org.springframework.util.ReflectionUtils.makeAccessible(ReflectionUtils.java:791)
	at org.springframework.data.mapping.context.AbstractMappingContext$PersistentPropertyCreator.doWith(AbstractMappingContext.java:575)
	at org.springframework.util.ReflectionUtils.doWithFields(ReflectionUtils.java:714)
	at org.springframework.data.mapping.context.AbstractMappingContext.doAddPersistentEntity(AbstractMappingContext.java:449)
	at org.springframework.data.mapping.context.AbstractMappingContext.addPersistentEntity(AbstractMappingContext.java:406)
	at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:291)
	at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:209)
	at org.springframework.data.mapping.context.AbstractMappingContext.getPersistentEntity(AbstractMappingContext.java:92)
	at org.springframework.data.mapping.context.MappingContext.getRequiredPersistentEntity(MappingContext.java:74)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writePropertyInternal(MappingMongoConverter.java:1039)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeProperties(MappingMongoConverter.java:936)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:911)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:884)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeCollectionInternal(MappingMongoConverter.java:1163)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.createCollection(MappingMongoConverter.java:1075)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writePropertyInternal(MappingMongoConverter.java:985)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeProperties(MappingMongoConverter.java:936)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:911)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writePropertyInternal(MappingMongoConverter.java:1045)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeProperties(MappingMongoConverter.java:936)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:911)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writePropertyInternal(MappingMongoConverter.java:1045)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeProperties(MappingMongoConverter.java:936)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:911)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:884)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeCollectionInternal(MappingMongoConverter.java:1163)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.createCollection(MappingMongoConverter.java:1075)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writePropertyInternal(MappingMongoConverter.java:985)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeProperties(MappingMongoConverter.java:936)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:911)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writePropertyInternal(MappingMongoConverter.java:1045)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeProperties(MappingMongoConverter.java:936)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:911)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writePropertyInternal(MappingMongoConverter.java:1045)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeProperties(MappingMongoConverter.java:936)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:911)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writePropertyInternal(MappingMongoConverter.java:1045)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeProperties(MappingMongoConverter.java:936)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:911)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:884)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeMapInternal(MappingMongoConverter.java:1197)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.writeInternal(MappingMongoConverter.java:874)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.write(MappingMongoConverter.java:834)
	at org.springframework.data.mongodb.core.convert.MappingMongoConverter.write(MappingMongoConverter.java:120)
	at org.springframework.data.mongodb.core.EntityOperations$SimpleMappedEntity.toMappedDocument(EntityOperations.java:621)
	at org.springframework.data.mongodb.core.MongoTemplate.findAndReplace(MongoTemplate.java:1113)
	at org.springframework.data.mongodb.core.MongoOperations.findAndReplace(MongoOperations.java:1043)
	at org.springframework.data.mongodb.core.MongoOperations.findAndReplace(MongoOperations.java:1018)

[christophstrobl]

Java 9++ introduced strong encapsulation and each Java runtime increased the level of encapsulation. Domain models are fully analyzed by the MappingContext and domain models must be accessible for Spring Data to work.
Trouble with LocalDateTime might also originate from a not fully intialized MongoMappingContext, which is hard to tell from the information provided.
A workaround is to add an --add-opens to the jvmArgs.

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