title: What is a simple, effective way to debug custom Kafka connectors?
body: <p>I'm working a couple of Kafka connectors and I don't see any errors in their creation/deployment in the console output, however I am not getting the result that I'm looking for (no results whatsoever for that matter, desired or otherwise). I made these connectors based on Kafka's example FileStream connectors, so my debug technique was based off the use of the SLF4J Logger that is used in the example. I've searched for the log messages that I thought would be produced in the console output, but to no avail. Am I looking in the wrong place for these messages? Or perhaps is there a better way of going about debugging these connectors?</p>
  
  <p>Example uses of the SLF4J Logger that I referenced for my implementation:</p>
  
  <p><a href="https://github.com/apache/kafka/blob/198a43d84693153c0f0177b8314117525c05047b/connect/file/src/main/java/org/apache/kafka/connect/file/FileStreamSinkTask.java" rel="noreferrer">Kafka FileStreamSinkTask</a></p>
  
  <p><a href="https://github.com/apache/kafka/blob/198a43d84693153c0f0177b8314117525c05047b/connect/file/src/main/java/org/apache/kafka/connect/file/FileStreamSourceTask.java" rel="noreferrer">Kafka FileStreamSourceTask</a></p>