RMI in java 17 WAR project. How do I fix this error?

Question

I am struggling to update my company's code from java 8 to 17. I have already added dependencies but the code uses RMI which was inbuilt in jdk 8 but its not available in jdk 11 and 17.

The codebase is a WAR project using tomcat 8.5 and active mq.

this is the error -

java.lang.ClassNotFoundException: com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject (no security manager: RMI class loader disabled)
    at java.rmi/sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:401)
    at java.rmi/sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:188)
    at java.rmi/java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:639)
    at java.rmi/java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:220)
    at java.rmi/java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:153)
    at javax.rmi.PortableRemoteObject.loadDelegateClass(PortableRemoteObject.java:206)
    at javax.rmi.PortableRemoteObject.createDelegateIfSpecified(PortableRemoteObject.java:183)
    at javax.rmi.PortableRemoteObject.<clinit>(PortableRemoteObject.java:63)
    at org.objectweb.jotm.TransactionImpl.makeSubCoord(TransactionImpl.java:1086)
    at org.objectweb.jotm.TransactionImpl.registerSynchronization(TransactionImpl.java:695)
    at org.hibernate.jdbc.JDBCContext.registerSynchronizationIfPossible(JDBCContext.java:215)
    at org.hibernate.impl.SessionImpl.checkTransactionSynchStatus(SessionImpl.java:2112)
    at org.hibernate.impl.SessionImpl.isOpen(SessionImpl.java:365)
    at org.hibernate.ejb.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:1006)
    at org.hibernate.ejb.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:163)
    at org.hibernate.ejb.EntityManagerImpl.<init>(EntityManagerImpl.java:84)
    at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:112)
    at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:107)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.invokeProxyMethod(AbstractEntityManagerFactoryBean.java:388)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean$ManagedEntityManagerFactoryInvocationHandler.invoke(AbstractEntityManagerFactoryBean.java:541)
    at jdk.proxy3/jdk.proxy3.$Proxy39.createEntityManager(Unknown Source)
    at org.springframework.orm.jpa.EntityManagerFactoryUtils.doGetTransactionalEntityManager(EntityManagerFactoryUtils.java:285)
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:232)
    at jdk.proxy3/jdk.proxy3.$Proxy46.createQuery(Unknown Source)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at jdk.proxy3/jdk.proxy3.$Proxy47.findDetailsByPropertyKeyInString(Unknown Source)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at jdk.proxy3/jdk.proxy3.$Proxy48.findDetailsByPropertyKeyInString(Unknown Source)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at jdk.proxy3/jdk.proxy3.$Proxy152.getFTIDLoginEnabled(Unknown Source)
    at org.apache.wicket.Application.fetchCreateAndSetSession(Application.java:1529)
    at org.apache.wicket.Session.get(Session.java:156)
    at org.apache.wicket.RestartResponseAtInterceptPageException$InterceptData.get(RestartResponseAtInterceptPageException.java:146)
    at org.apache.wicket.RestartResponseAtInterceptPageException$1.matchedData(RestartResponseAtInterceptPageException.java:210)
    at org.apache.wicket.RestartResponseAtInterceptPageException$1.getCompatibilityScore(RestartResponseAtInterceptPageException.java:180)
    at org.apache.wicket.request.mapper.CompoundRequestMapper.mapRequest(CompoundRequestMapper.java:123)
    at org.apache.wicket.request.cycle.RequestCycle.resolveRequestHandler(RequestCycle.java:184)
    at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:209)
    at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:283)
    at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188)
    at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:244)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
    at java.base/java.lang.Thread.run(Thread.java:842)`

Sadly I cannot share the code because I am not allowed to, I used glassfish-cobra because cobra was removed from jdk as well.

Things I have tried - Spent 6 hours searching for anything on google, 4-5 hours of asking chatgpt if it could help me.

I haven't tried creating a security manager because I have no idea what I am doing, I am just an intern and this is my first job, I am not even good at java so I avoided that for now.

Also yes I have already checked similar posts to this and no they werent of any help to me. A few of them say to just create a security manager but idk how to do it or make it work in this huge codebase.