Various "nested" problems with elasticsearch 0.17.9 and 0.18.5 part 1

gistfile1.txt

I managed to get the query to fail a few different ways, one of them appears to be linked to my "random" use of "nested" as the index type while trying to reproduce the "operational" error I occurred.

1] Create an index called "nested_test" (eg I did this from elasticsearch-head) with 5 shards and 0 replicas

(or presumably something like 
curl -XPUT 'http://localhost:9200/nested_test/' -d '
index :
    number_of_shards : 5
    number_of_replicas : 0
'
would be equivalent)

2] Create a type mapping called "nested"

curl -XPUT 'http://localhost:9200/nested_test/nested/_mapping' -d '{"type1":{"properties":{"obj1":{"type":"nested"}}}}'

3] Add a test object

curl -XPOST 'http://localhost:9200/nested_test/nested/' -d '{"obj1":[{"name":"blue",count:4},{"name":"green",count:6}]}'

4] Query for the object without the type specified:

curl -XGET 'http://localhost:9200/nested_test/_search?pretty=true' -d'{"query":{"nested": { "path":"obj1", "query": { "match_all":{}}}}}'

This works fine, eg:

<snip>
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
</snip>

5] Query for the object with the type specified:

curl -XGET 'http://localhost:9200/nested_test/nested/_search?pretty=true' -d'{"query":{"nested": { "path":"obj1", "query": { "match_all":{}}}}}'

This fails every time, eg

<snip>
{
  "took" : 14,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 4,
    "failed" : 1,
    "failures" : [ {
      "index" : "nested_test",
      "shard" : 2,
      "status" : 500,
      "reason" : "QueryPhaseExecutionException[[nested_test][2]: query[BlockJoinQuery (filtered(ConstantScore(*:*))->FilterCacheFilterWrapper(_type:__obj1))],from[0],size[10]: Query Failed [Failed to execute main query]]; nested: "
    } ]
</snip>

The elasticsearch.log has a little bit more detail:

<snip>
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)
</snip>

6] Repeat steps [2]-[5] except with the index type "test_type" instead of "nested"

This time it seems to work every time, eg:

curl -XGET 'http://localhost:9200/nested_test/test_type/_search?pretty=true' -d'{"query":{"nested": { "path":"obj1", "query": { "match_all":{}}}}}'

<snip>
{
  "took" : 6,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
</snip>