Error when document has _parent field

[alexol91]

Hello .

I have a child document depends on a parent document.

In the re-indexing error it occurs:

{
"name": "elasticsearch-reindex",
"hostname": "AONATE-PC",
"pid": 3920,
"level": 40,
"index": {
"_index": "issues",
"_type": "messages",
"_id": "D5EE3CE7",
"status": 400,
"error": "RoutingMissingException[routing is required for [issues]/[messages]/[D5EE3CE7]]"
},
"msg": "",
"time": "2016-07-12T12:45:56.113Z",
"src": {
"file": "C:....\elasticsearch-reindex.js",
"line": 211
},
"v": 0
}

Apparently the _parent field is not returned or is not accessible.