How can I view the contents of an ElasticSearch index?

Question

I configured a custom analyzer and put some documents into the index. Now I want to debug my settings so I can see which n-grams actually made it into the index.

When I used Solr before, there was a possibility to see which strings were saved in the index as keys and also their frequency.

Answer 1

You can view any existing index by using the below CURL. Please replace the index-name with your actual name before running and it will run as is.

View the index content

curl -H 'Content-Type: application/json' -X GET https://localhost:9200/index_name?pretty 

And the output will include an index(see settings in output) and its mappings too and it will look like below output -

{   "index_name": {     "aliases": {},     "mappings": {       "collection_name": {         "properties": {           "test_field": {             "type": "text",             "fields": {               "keyword": {                 "type": "keyword",                 "ignore_above": 256               }             }           }        }     },     "settings": {       "index": {         "creation_date": "1527377274366",         "number_of_shards": "5",         "number_of_replicas": "1",         "uuid": "6QfKqbbVQ0Gbsqkq7WZJ2g",         "version": {           "created": "6020299"         },         "provided_name": "index_name"       }     }   } } 

View ALL the data under this index

curl -H 'Content-Type: application/json' -X GET https://localhost:9200/index_name/_search?pretty 

Answer 2

If you didn't index too much data into the index yet, you can use term facet query on the field that you would like to debug to see the tokens and their frequencies:

curl -XDELETE 'http://localhost:9200/test-idx' echo curl -XPUT 'http://localhost:9200/test-idx' -d ' {     "settings": {         "index.number_of_shards" : 1,         "index.number_of_replicas": 0     },     "mappings": {                     "doc": {             "properties": {                 "message": {"type": "string", "analyzer": "snowball"}             }         }     }  }' echo curl -XPUT 'http://localhost:9200/test-idx/doc/1' -d ' {   "message": "How is this going to be indexed?" } ' echo curl -XPOST 'http://localhost:9200/test-idx/_refresh' echo curl -XGET 'http://localhost:9200/test-idx/doc/_search?pretty=true&search_type=count' -d '{     "query": {         "match": {             "_id": "1"         }     },     "facets": {         "tokens": {             "terms": {                 "field": "message"             }         }     } } ' echo