1. Create an index

        solr create -c nested

2. Index two documents, where one is nested.

        curl localhost:8983/solr/a/update -d '<add>
		   <doc>
		     <field name="id">friend</field>
		     <field name="type">other</field>
		   </doc>
		   <doc>
		     <field name="id">mother</field>
		     <field name="type">parent</field>
		     <doc>
		       <field name="id">daughter</field>
		       <field name="type">child</field>
		     </doc>
		   </doc>
		 </add>'

3. Search for children of "mother"

        curl "localhost:8983/solr/a/query?q=id:mother&fl=%2A%2C%5Bchild%20parentFilter%3Dtype%3Aparent%5D”
    You get "friend" mistakenly in the list of children

4. Now index same two docs again, but in opposite order

        curl localhost:8983/solr/a/update -d '<add>
		   <doc>
		     <field name="id">mother</field>
		     <field name="type">parent</field>
		     <doc>
		       <field name="id">daughter</field>
		       <field name="type">child</field>
		     </doc>
		   </doc>
		   <doc>
		     <field name="id">friend</field>
		     <field name="type">other</field>
		   </doc>
		 </add>'

5. Search again

        curl "localhost:8983/solr/a/query?q=id:mother&fl=%2A%2C%5Bchild%20parentFilter%3Dtype%3Aparent%5D”
    You now only get "daughter" as child of "mother"

Why?