Elasticsearch DeleteByQuery not working, getting 400 bad request

Question

I have the following Nest query to delete all the matching documents, quite straight forward but I am getting 400 bad request on it.

 var client = new ElasticClient();
        var request = new DeleteByQueryRequest<Type>("my-index")
        {
            Query = new QueryContainer(
                    new TermQuery
                    {
                        Field = "versionId",
                        Value = "ea8e517b-c2e3-4dfe-8e49-edc8bda67bad"
                    }
                )
        };
        var response = client.DeleteByQuery(request);
        Assert.IsTrue(response.IsValid);

Thanks for any help.

---------------Update---------------

Request Body

{"query":{"term":{"versionId":{"value":"ea8e517b-c2e3-4dfe-8e49-edc8bda67bad"}}}}

Response Body

{"took":0,"timed_out":false,"_indices":{"_all":{"found":0,"deleted":0,"missing":0,"failed":0}},"failures":[]}

Query in Sense plugin:

GET /my-index/type/_search
{
  "query": {

          "match": {
             "versionId": "ea8e517b-c2e3-4dfe-8e49-edc8bda67bad"
          } 

  }
}

Query Response:

{
   "took": 3,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 116,
      "max_score": 2.1220484,
      "hits": []
...
}}

---------------NEST QUERY--------------

DELETE http://localhost:9200/my-index/component/_query?pretty=true
{
  "query": {
    "term": {
      "versionId": {
        "value": "ea8e517b-c2e3-4dfe-8e49-edc8bda67bad"
      }
    }
  }
}

Status: 200
{
  "took" : 0,
  "timed_out" : false,
  "_indices" : {
    "_all" : {
      "found" : 0,
      "deleted" : 0,
      "missing" : 0,
      "failed" : 0
    }
  },
  "failures" : [ ]
}

Answer 1

It sounds like you may be using Elasticsearch 2.x in conjunction with NEST 2.x. As part of Elasticsearch 2.0, Delete by query was moved out of Elasticsearch core and into a separate plugin that needs to be installed. You can install the plugin using the following command within the Elasticsearch bin directory

bin/plugin install delete-by-query

Starting up the node again, Delete by query should now work as expected.

If you ever need to get more details about why a request has failed, you can inspect the .DebugInformation on the response to get the audit trail for the request.