c# - Getting "An item with this key has already been added" when performing a DeleteByQuery with Nest (Elasticsearch) -

i trying run delete query delete documents between 2 timestamps in index, , getting strange result.

here code:

// how index created if (!es.indexexists(indexname).exists) {     es.createindex(descriptor => descriptor         .index(indexname)         .addmapping<mydocument>(m => m             .mapfromattributes())); }  // event object mapped public class mydocument {     public long id { get; set; }      public long eventtime { get; set; }      [elasticproperty(index = fieldindexoption.notanalyzed)]     public string eventtype { get; set; }      public datetime createdat { get; set; }      public idictionary<string, object> values { get; set; }     // snip }  // delete call ielasticclient es; es.deletebyquery<mydocument>(q => q     .query(rq => rq         .range(t => t.onfield("eventtime").greaterorequals(starttimestamp).lowerorequals(endtimestamp))); 

this throws exception saying "an item same key has been added". doing wrong delete query throw exception?

here sample document search did through elasticsearch:

{   "took" : 8,   "timed_out" : false,   "_shards" : {     "total" : 5,     "successful" : 5,     "failed" : 0   },   "hits" : {     "total" : 96,     "max_score" : 1.0,     "hits" : [ {       "_index" : "testing2",       "_type" : "mydocument",       "_id" : "112",       "_score" : 1.0,       "_source":{"id":112,"eventtime":12345690,"eventdate":"1970-05-23t17:21:30-04:00","eventtypeid":0,"ready":false,"name":"","doccount":0,"wordcount":0,"createdat":"2015-06-25t09:29:33.8996707-04:00","values":{"internal_timestamp":76890.0},"childdocuments":[],"parentdocuments":[]}     }, /* snip */]   } } 

rob , worked out.

the problem occurring here project using newtonsoft.json version 7.0.0 nest version 1.5.1, whereas nest 1.5.1 requires 6.0.1. mismatch causing serialization of queries throw exceptions.

this can solved either upgrading nest version 1.6.1 or downgrading newtonsoft.json version 6.0.1.