ES 5.6 elasticsearch_deprecation.log WARN

Elastic Stack Elasticsearch
1

Hello.
Tell me the probable cause of these records?

[2018-04-26T15:40:08,206][WARN ][o.e.d.r.RestController ] Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header.
[2018-04-26T15:40:08,207][WARN ][o.e.d.r.RestController ] Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header.
[2018-04-26T15:40:08,208][WARN ][o.e.d.r.RestController ] Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header.
[2018-04-26T15:40:08,209][WARN ][o.e.d.r.RestController ] Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header.
...

2

You are calling elasticsearch with a body without specifying the Content-Type.

3

I specify so, but still there is a WARN

    <?php
    curl_setopt($ci, CURLOPT_URL, 'http://127.0.0.1:9200/index/type/');
    curl_setopt($ci, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ci, CURLOPT_FORBID_REUSE, 0);
    curl_setopt($ci, CURLOPT_HTTPHEADER, ['Content-Type: application/json; charset=UTF-8']);
    curl_setopt($ci, CURLOPT_POST, true);
    curl_setopt($ci, CURLOPT_POSTFIELDS, json_encode($data_query, JSON_UNESCAPED_UNICODE));
    ...
    ?>
4

I don't know. What happens if you do that with curl instead of PHP?

5

The error went away. This was due to running scripts.
Thank you. The problem is solved.