Change settings and mappings on existing index in Elasticsearch

Question

I would like the following settings and mapping set on an already existing index in Elasticsearch:

{
    \"analysis\": {
        \"analyzer\": {
                     


        

Answer 1

If you look at your settings after sending the changes you'll notice that the analyzer is not there. In fact you can't change the analysis section of the settings on a live index. Better to create it with the desired settings, otherwise you can just close it:

curl -XPOST localhost:9200/index_name/_close

While the index is closed you can send the new settings. After that you can reopen the index:

curl -XPOST localhost:9200/index_name/_open

While the index is closed it doesn't use any cluster resource, but it is not readable nor writable. If you want to close and reopen the index using the Java API you can use the following code:

client.admin().indices().prepareClose(indexName).execute().actionGet();
//TODO update settings
client.admin().indices().prepareOpen(indexName).execute().actionGet();