So for some reason, Glassfish seems to expose a version of com.fasterxml.jackson.dataformat:jackson-dataformat-xml that still uses the javax.xml API, but there is no provider that implements that API available on the classpath. You can configure hibernate.type.xml_format_mapper to jaxb which will then make use of a jakarta.xml provider. Not sure there is much Hibernate can do. Glassfish just put incompatible stuff on the classpath.