Hibernate issue when upgrading Spring Boot from 2.5.6 to 2.6.1

[Skyterix1991]

Describe the bug
Hibernate is having weird issues when upgrading spring boot parent starter and cloud dependencies. It spits out error below:

java.security.PrivilegedActionException: null
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:573) ~[na:na]
	at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.<clinit>(Injector.java:197) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.reflect.opt.AccessorInjector.prepare(AccessorInjector.java:81) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.reflect.opt.OptimizedAccessorFactory.get(OptimizedAccessorFactory.java:179) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.reflect.Accessor$FieldReflection.optimize(Accessor.java:285) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.property.SingleElementLeafProperty.<init>(SingleElementLeafProperty.java:92) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[na:na]
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[na:na]
	at com.sun.xml.bind.v2.runtime.property.PropertyFactory.create(PropertyFactory.java:128) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.<init>(ClassBeanInfoImpl.java:181) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getOrCreate(JAXBContextImpl.java:514) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:331) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:139) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1156) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:165) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
	at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:297) ~[jaxb-api-2.3.1.jar:2.3.0]
	at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:286) ~[jaxb-api-2.3.1.jar:2.3.0]
	at javax.xml.bind.ContextFinder.find(ContextFinder.java:409) ~[jaxb-api-2.3.1.jar:2.3.0]
	at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:721) ~[jaxb-api-2.3.1.jar:2.3.0]
	at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:662) ~[jaxb-api-2.3.1.jar:2.3.0]
	at org.hibernate.boot.jaxb.internal.MappingBinder.entityMappingsJaxbContext(MappingBinder.java:85) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.boot.jaxb.internal.MappingBinder.doBind(MappingBinder.java:61) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.boot.jaxb.internal.AbstractBinder.doBind(AbstractBinder.java:103) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.boot.jaxb.internal.AbstractBinder.bind(AbstractBinder.java:58) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.boot.jaxb.internal.InputStreamXmlSource.doBind(InputStreamXmlSource.java:43) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.boot.jaxb.internal.InputStreamXmlSource.doBind(InputStreamXmlSource.java:38) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.boot.spi.XmlMappingBinderAccess.bind(XmlMappingBinderAccess.java:79) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.boot.model.process.internal.ScanningCoordinator.applyScanResultsToManagedResources(ScanningCoordinator.java:221) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.boot.model.process.internal.ScanningCoordinator.coordinateScan(ScanningCoordinator.java:82) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.prepare(MetadataBuildingProcess.java:107) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:269) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:182) ~[hibernate-core-5.6.1.Final.jar:5.6.1.Final]
	at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:52) ~[spring-orm-5.3.13.jar:5.3.13]
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.13.jar:5.3.13]
	at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.13.jar:5.3.13]
	at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.13.jar:5.3.13]
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.13.jar:5.3.13]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.13.jar:5.3.13]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.13.jar:5.3.13]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.13.jar:5.3.13]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.13.jar:5.3.13]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.13.jar:5.3.13]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.13.jar:5.3.13]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.13.jar:5.3.13]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.13.jar:5.3.13]
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.13.jar:5.3.13]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.13.jar:5.3.13]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.13.jar:5.3.13]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.1.jar:2.6.1]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) ~[spring-boot-2.6.1.jar:2.6.1]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412) ~[spring-boot-2.6.1.jar:2.6.1]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) ~[spring-boot-2.6.1.jar:2.6.1]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.1.jar:2.6.1]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) ~[spring-boot-2.6.1.jar:2.6.1]
	at ws.furrify.posts.PostsApplication.main(PostsApplication.java:17) ~[classes/:na]
Caused by: java.lang.NoSuchMethodException: sun.misc.Unsafe.defineClass(java.lang.String,[B,int,int,java.lang.ClassLoader,java.security.ProtectionDomain)
	at java.base/java.lang.Class.getMethod(Class.java:2227) ~[na:na]
	at com.sun.xml.bind.v2.runtime.reflect.opt.Injector$3.run(Injector.java:201) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at com.sun.xml.bind.v2.runtime.reflect.opt.Injector$3.run(Injector.java:197) ~[jaxb-impl-2.3.0.1.jar:2.3.0.1]
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:569) ~[na:na]
	... 61 common frames omitted

and (below that)

org.hibernate.boot.InvalidMappingException: Could not parse mapping document: file:/home/sky/Projekty/IntelliJ%20IDEA/FurrifyWS-Storage/FurrifyWS-Posts/posts-adapters/target/classes/META-INF/orm.xml (INPUT_STREAM)

The error seems straightforward, my config must be wrong. Except it is not, and here is when the weird stuff starts to happen. I managed to narrow it down to spring-cloud-starter-oauth2 doing something weird in the new version.

It turns out there is some broken version of hibernate inside of it. The fix for my problem is:

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.6.2.Final</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-oauth2</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>

I have to place hibernate in my pom.xml. And the weird thing is that it HAS to be above the oauth starter, or else it just spits the same error out.

Here is my orm.xml is someone wants to take a look at it: https://github.com/Skyterix1991/FurrifyWS-Storage/blob/master/FurrifyWS-Posts/posts-adapters/src/main/resources/META-INF/orm.xml