Ilia Basin ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiYjgzZmUwNGVk... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16373?atlOrigin=eyJpIjoiYjgzZm... ) HHH-16373 ( https://hibernate.atlassian.net/browse/HHH-16373?atlOrigin=eyJpIjoiYjgzZm... ) NPE when trying to marshal null AccessType in JaxbEntityMappings ( https://hibernate.atlassian.net/browse/HHH-16373?atlOrigin=eyJpIjoiYjgzZm... ) Change By: 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}} {code:java}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);{code} 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 )