Encountering ElasticsearchIllegalArgumentException when using Phrase Suggester - elasticsearch

Question

I'm trying to use ElasticSearch 1.7.3 to implement a Did-you-mean function for my company's search engine. I've followed the documentation to set up a Phrase Suggester and created a customized mapping to support that.
However, when I do a _suggest query, I get ElasticsearchIllegalArgumentException[Suggester[simple_phrase] not supported]. What am I doing wrong?
This is my query:
POST knowledge_graph/entities/_suggest
{
"suggest": {
"text" : "apple in",
"simple_phrase": {
"phrase" : {
"field" : "canonical_name"
}
}
}
}
I get the following response:
{
"_shards": {
"total": 5,
"successful": 0,
"failed": 5,
"failures": [
{
"index": "knowledge_graph",
"shard": 0,
"status": 500,
"reason": "BroadcastShardOperationFailedException[[knowledge_graph][0] ]; nested: ElasticsearchException[failed to execute suggest]; nested: ElasticsearchIllegalArgumentException[Suggester[simple_phrase] not supported]; "
},
...
]
}
}
Here's my index's settings and mappings:
{
"knowledge_graph": {
"aliases": {},
"mappings": {
"entities": {
"properties": {
"autocomplete": {
"type": "completion",
"analyzer": "simple",
"payloads": true,
"preserve_separators": true,
"preserve_position_increments": true,
"max_input_length": 50
},
"canonical_name": {
"type": "string",
"analyzer": "simple",
"fields": {
"shingles": {
"type": "string",
"analyzer": "simple_shingle_analyzer"
}
}
},
"entity_query": {
"properties": {
"simple_phrase": {
"properties": {
"phrase": {
"properties": {
"field": {
"type": "string"
}
}
}
}
},
"text": {
"type": "string"
}
}
},
"suggest": {
"properties": {
"simple_phrase": {
"properties": {
"phrase": {
"properties": {
"field": {
"type": "string"
}
}
}
}
},
"text": {
"type": "string"
}
}
}
}
}
},
"settings": {
"index": {
"creation_date": "1449251691345",
"analysis": {
"filter": {
"shingles_1_6": {
"type": "shingle",
"max_shingle_size": "6",
"output_unigrams_if_no_shingles": "true"
}
},
"analyzer": {
"simple_shingle_analyzer": {
"type": "custom",
"filter": [
"lowercase",
"shingles_1_6"
],
"tokenizer": "standard"
}
}
},
"number_of_shards": "5",
"number_of_replicas": "0",
"version": {
"created": "1070399"
},
"uuid": "g_Yp7z6kQHCDRtd6TvVlzQ"
}
},
"warmers": {}
}
}

Answer 1

There are two ways to execute suggest requests, one with _search endpoint and another with _suggest endpoint.
From the Docs
Suggest requests executed against the _suggest endpoint should omit
the surrounding suggest element which is only used if the suggest
request is part of a search.
Your query will work if you execute it against _search api
POST knowledge_graph/entities/_search <---- here
{
"suggest": {
"text" : "apple in",
"simple_phrase": {
"phrase" : {
"field" : "canonical_name"
}
}
},
"size" : 0
}
If you want to query with _suggest endpoint try this
POST knowledge_graph/_suggest
{
"suggest": {
"text": "apple in",
"phrase": {
"field": "canonical_name"
}
}
}
Note - I think you should be executing phrase suggest against canonical_name.shingles