Bart Vansegbroeck ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5be4380... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZjI5MzA2MDUy... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16105?atlOrigin=eyJpIjoiZjI5Mz... ) HHH-16105 ( https://hibernate.atlassian.net/browse/HHH-16105?atlOrigin=eyJpIjoiZjI5Mz... ) Hibernate no longer detects HashMap property with AttributeConverter as dirty ( https://hibernate.atlassian.net/browse/HHH-16105?atlOrigin=eyJpIjoiZjI5Mz... ) Change By: Bart Vansegbroeck ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5be4380... ) An entity has a HashMap as property, property is convertered using an AttributeConverter. After updating the hashmap, the dirty check does not flag this property as dirty and no update is done. {noformat}@Entity @Table(name = "person") public class Person { @Id private int id; ... @Convert(converter = HashMapConverter.class) private Map<String, Object> attributes = new HashMap<>(); ... } public class HashMapConverter implements AttributeConverter<HashMap<String, Object>, String> { private final ObjectMapper mapper = new ObjectMapper(); @Override public String convertToDatabaseColumn(HashMap<String, Object> stringObjectHashMap) { try { return mapper.writeValueAsString(stringObjectHashMap); } catch (JsonProcessingException e) { throw new RuntimeException(e); } } @Override public HashMap<String, Object> convertToEntityAttribute(String string) { try { return mapper.readValue(string, new TypeReference<>() {}); } catch (IOException e) { throw new RuntimeException(e); } } }{noformat} I’ve added a failing test case in orm/ hibernate-orm-6 and a working test case with the same setup in orm/ hibernate-orm-5 test case: [github|https://github.com/BartVansegbroeck/hhh16105] ( https://hibernate.atlassian.net/browse/HHH-16105#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16105#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#100214- sha1:634fa42 )