gistfile1.txt

Commands - 

curl -X PUT "localhost:9200/algotree" -d '{ 	"settings" : { "index" : { "number_of_shards" : 2, "number_of_replicas" : 1 },
        					"analysis" : {"analyzer":{"my_analyzer" : { "tokenizer" : "keyword", "filter" : ["icu_normalizer"] }}}
}}'
echo
curl -X PUT "localhost:9200/algotree/public/_mapping" -d '{
"public" :{
    "properties" :{
	"id" : { "type" : "string" } ,
        "names" : { "type" : "nested" }
    }
}
}'
curl -X POST "localhost:9200/algotree/public"  -d '{  "id" : "first", "names" : [ {"id" : "1" , "name" : "there was the god first"},{ "id" : "2"  , "name" : "then came the world"}] }'
curl -X POST "localhost:9200/algotree/public"  -d '{  "id" : "second", "names" : [ {"id" : "3" , "name" : "this is epic , c team is gone"},{ "id" : "4"  , "name" : "the return of the pink flower"}] }'

QUERY request 

{
  "query": {
    "nested": {
      "path": "names",
      "score_mode": "avg",
      "query": {
        "bool": {
          "must": [
            {
              "text": {
                "names.name": "god"
              }
            }
          ]
        }
      }
    }
  },
  "highlight": {
    "fields": {
      "names.name": {}
    }
  }
}

ERROR stack trace

org.elasticsearch.search.query.QueryPhaseExecutionException: [algotree][1]: query[BlockJoinQuery (filtered(names.name:god)->FilterCacheFilterWrapper(_type:__names))],from[0],size[10]: Query Failed [Failed to execute main query]
	at org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:221)
	at org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:238)
	at org.elasticsearch.search.action.SearchServiceTransportAction.sendExecuteQuery(SearchServiceTransportAction.java:134)
	at org.elasticsearch.action.search.type.TransportSearchQueryThenFetchAction$AsyncAction.sendExecuteFirstPhase(TransportSearchQueryThenFetchAction.java:80)
	at org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.performFirstPhase(TransportSearchTypeAction.java:205)
	at org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.performFirstPhase(TransportSearchTypeAction.java:192)
	at org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction$2.run(TransportSearchTypeAction.java:178)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
	at org.elasticsearch.index.query.NestedQueryParser$LateBindingParentFilter.getDocIdSet(NestedQueryParser.java:170)
	at org.elasticsearch.index.search.nested.BlockJoinQuery$BlockJoinWeight.scorer(BlockJoinQuery.java:171)
	at org.apache.lucene.search.FilteredQuery.getFilteredScorer(FilteredQuery.java:149)
	at org.apache.lucene.search.FilteredQuery$1.scorer(FilteredQuery.java:117)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:577)
	at org.elasticsearch.search.internal.ContextIndexSearcher.search(ContextIndexSearcher.java:199)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:445)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:426)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:342)
	at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:330)
	at org.elasticsearch.search.query.QueryPhase.execute(QueryPhase.java:217)
	... 9 more