How to put logstash in debug logging mode?

Elastic Stack Logstash
1

We are chasing a problem where logstash stops listening, and starts logging this over and over:

 [2017-11-17T13:57:44,949][ERROR][logstash.outputs.elasticsearch] 
Encountered a retryable error. Will Retry with exponential backoff 
{:code=>400, :url=>"http://<IP of ES endpoint>:9200/_bulk"}

How do we get more debug/detail out of logstash to chase this?

2

You should check the Elasticsearch logs.

Also https://www.elastic.co/guide/en/logstash/6.0/running-logstash-command-line.html#command-line-flags will be of some use :slight_smile:

3

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