What I am wrong with search using term query?

Elastic Stack Elasticsearch
1

hi，guys. I got a problem when i am using search mothed with term query.
I write two similar curl commands， the only different part is the query aims at different fields in the same document. But one is success, the other is failed. I can't figure out where I am wrong, so please help me. Many Thanks.

Here are the commands and their results:
The success command：
$ curl -XGET 'http://localhost:9200/cmongo_statistics/cmongo_cluster_info/_search?pretty' -d '{"query":{"term":{"region_id":1}}}'0

The right result：

{
"took" : 8,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"failed" : 0
},
"hits" : {
"total" : 76,
"max_score" : 0.9780211,
"hits" : [ {
"_index" : "cmongo_statistics",
"_type" : "cmongo_cluster_info",
"_id" : "AVTtMUejStKgUadx78sX",
"_score" : 0.9780211,
"_source" : {
"region_id" : 1,
"cluster_id" : "cmgo-79rjj8o3",
"all_storage" : 30720,
"timestamp" : 1464268310
}
}, { ...

The wrong command：
curl -XGET 'http://localhost:9200/cmongo_statistics/cmongo_cluster_info/_search?pretty' -d '{"query":{"term":{"cluster_id" : "cmgo-79rjj8o3"}}}'

The wrong result：
{
"took" : 2,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"failed" : 0
},
"hits" : {
"total" : 0,
"max_score" : null,
"hits" : [ ]
}
}

command contrast
the success one：
curl -XGET 'http://localhost:9200/cmongo_statistics/cmongo_cluster_info/_search?pretty' -d '{"query":{"term":{"region_id":1}}}'0

the failed one：
curl -XGET 'http://localhost:9200/cmongo_statistics/cmongo_cluster_info/_search?pretty' -d '{"query":{"term":{"cluster_id" : "cmgo-79rjj8o3"}}}'

2

Please format your code.

Term queries are not analyzed. So you are comparing with what exist in the inverted index.

Probably your text cmgo-79rjj8o3 has been analyzed and indexed as cmgo 79rjj8o3.

That's the reason it does not match.

You can use a match query instead or change the analyzer for your field to be not_analyzed. index: not_analyzed