Ilia Basin ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZjQ3N2NiMjIw... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16373?atlOrigin=eyJpIjoiZjQ3N2... ) HHH-16373 ( https://hibernate.atlassian.net/browse/HHH-16373?atlOrigin=eyJpIjoiZjQ3N2... ) NPE when trying to marshal null AccessType in JaxbEntityMappings ( https://hibernate.atlassian.net/browse/HHH-16373?atlOrigin=eyJpIjoiZjQ3N2... ) Issue Type: Bug Affects Versions: 6.1.7 Assignee: Unassigned Created: 26/Mar/2023 02:15 AM Priority: Major Reporter: Ilia Basin ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) I used hibernate.transform_hbm_xml.enabled to convert a legacy.hbm.xml to the modern format and then tried to dump it as XML to standard output. I used org.glassfish.jaxb:jaxb-runtime:4.0.2 JaxbEntityMappings obj = ... jaxbContext = JAXBContext.newInstance(JaxbEntityMappings.class); final Marshaller marshaller = jaxbContext.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); marshaller.marshal(obj, System.out); Got this error: noformat Caused by: java.lang.NullPointerException at org.hibernate.boot.jaxb.mapping.marshall.AccessTypeMarshalling.toXml(AccessTypeMarshalling.java:22) at org.hibernate.boot.jaxb.mapping.Adapter1.marshal(Adapter1.java:17) at org.hibernate.boot.jaxb.mapping.Adapter1.marshal(Adapter1.java:7) at org.glassfish.jaxb.runtime.v2.runtime.reflect.AdaptedAccessor.get(AdaptedAccessor.java:46) ... 23 more noformat Same problem with the class FetchTypeMarshalling I think a null check is needed in toXml() ( https://hibernate.atlassian.net/browse/HHH-16373#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16373#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100219- sha1:ac3e918 )