Your ElasticSearchPlatform is not configured properly

Hello all,

I recently installed ElasticSearch for Nextcloud, but it doesn't work properly, my server's OS is Ubuntu + Nextcloud19.1, and issue is:

root@steven:/var/www/html# sudo -u www-data php ./nextcloud/occ fulltextsearch:test

.Testing your current setup:
Creating mocked content provider. ok
Testing mocked provider: get indexable documents. (2 items) ok
Loading search platform. (Elasticsearch) ok
Testing search platform. ok
Locking process ok
Removing test. fail
Error detected, unlocking process ok
In ConfigService.php line 144:

Your ElasticSearchPlatform is not configured properly

root@steven:/var/www/html# sudo -u www-data php ./nextcloud/occ fulltextsearch:check Full text search 1.4.2

• Search Platform:
  Elasticsearch 1.5.2
  {
  "elastic_host": [
  "http://127.0.0.1:9200"
  ],
  "elastic_index": "",
  "fields_limit": "10000",
  "es_ver_below66": "0",
  "analyzer_tokenizer": ""
  }

• Content Providers:
  Files 1.4.3
  {
  "files_local": "1",
  "files_external": "1",
  "files_group_folders": "0",
  "files_encrypted": "0",
  "files_federated": "0",
  "files_size": "20",
  "files_pdf": "0",
  "files_office": "0",
  "files_image": "0",
  "files_audio": "0"
  }

Thanks!

Start by reproducing the failure with the occ fulltextsearch:test command and inspect ConfigService.php around line 144, using the fulltextsearch:check configuration shown in the report. Determine why the Elasticsearch platform fails while removing the test index; done means the test completes without the configuration error and the relevant behavior is covered by an appropriate regression test.