I've started using Logstash coming from different pipeline products and I find it hard to understand what's wrong with my pipelines when it doesn't behave as expected.
For example, I've copied one simple JDBC input to Elastc Output and i get no documents. This is fine. Probably something is mis-configured or other issue.
The problem is, I don't get any logs, even when debug, it's at minimum and I have no indication if the username is wrong, or the query syntax is wrong, or even if the input tried to be executed.
I also don't know how to see how one event looks at a particular logstash, is there a LogEvent filter which can log it somehow?
Any advice from experienced logstash user on how you debug your pipelines from start to finish? Thanks