javax.persistence.PersistenceException: org.hibernate.type.SerializationException: could not deserialize

Question

When executing a Criteria Query in hibernate, I get the following exception:

javax.persistence.PersistenceException: javax.persistence.PersistenceException: org.         


        

Answer 1

I had the same problem. It was due to an enum in a @SqlResultSetMapping. The solution is here: @ConstructorResult with Enum in JPA 2.1

Edit, due to a comment from @Eugene Mihaylin:
So, I had the following situation:

    @SqlResultSetMapping(
    name = "MyTargetClassMappingName",
    classes = {
            @ConstructorResult(
                    targetClass = MyTargetClassDTO.class,
                    columns = {
                            @ColumnResult(name = "name_from_query1"),
                            @ColumnResult(name = "name_from_query2"),
                            ...
                            @ColumnResult(name = "name_of_problematic_column", type = MyCustomEnum.class),
                    }
            )
    })
    @Entity
    public class MyTargetClassDTO ...

And I needed to change to:

    @SqlResultSetMapping(
    name = "MyTargetClassMappingName",
    classes = {
            @ConstructorResult(
                    targetClass = MyTargetClassDTO.class,
                    columns = {
                            @ColumnResult(name = "name_from_query1"),
                            @ColumnResult(name = "name_from_query2"),
                            ...
                            @ColumnResult(name = "name_of_problematic_column", type = String.class),
                    }
            )
    })
    @Entity
    public class MyTargetClassDTO ...

in order to fix the issue.

Later, in the constructor of the DTO (annotated as @Entity), I am doing: MyCustomEnum.valueOf(...) in order to parse the value of the string and assign it to the specified field of type MyCustomEnum in the DTO.