I wonder if this was an intentional change:
My mapping config looks like this:
<resultMap id="partSetMap" type="PartSetDto">
<id property="id" column="id"/>
<collection property="parts" ofType=" PartDto">
<result column="part_id" property="id" javaType="Long"/>
<result column="serial_no" property="serialNo" javaType="String"/>
<result column="is_reserved" property="isReserved"
javaType="boolean"/>
</collection>
</resultMap>
<select id="selectPage" resultMap="partSetMap">
...
PartSetDto has lots of other properties than "id".
In beta 8 those were automatically filled by naming convention.
In beta 9 all other fields are empty.