Running ELK 5.3.2 on CentOS 7.3. I am seeing a stream of the following error events (once every ten seconds) which are seemingly due to X-Pack:
[2017-05-21T13:27:11,120][ERROR][logstash.outputs.elasticsearch] Got a bad response code from server, but this code is not considered retryable. Request will be dropped {:code=>400, :response_body=>"{"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"request [/_xpack/monitoring/_bulk] contains unrecognized parameters: [interval], [system_api_version], [system_id]"}],"type":"illegal_argument_exception","reason":"request [/_xpack/monitoring/_bulk] contains unrecognized parameters: [interval], [system_api_version], [system_id]"},"status":400}"}
They do not seem to have a negative impact on LogStash feeding events into ElasticSearch, but I am not comfortable with these errors.
Any idea about how to identify the root cause and resolve?