title: Set Apache Storm and Flink log level to display debug messages
body: <p>So I'm building a JAR with Storm and Flink applications where I log messages as the following:</p>
  
  <pre class="lang-java prettyprint-override"><code>import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  // ...
  
  private static final Logger LOG = LoggerFactory.getLogger(Some.class);
  
  // ...
  
  LOG.debug("...");
  LOG.info("...");
  LOG.error("...");
  </code></pre>
  
  <p>Then I pass the JAR to <code>.../bin/storm</code> and <code>.../bin/flink</code> scripts and everything works, but the log level is set to <code>INFO</code>, I'd like to also display <code>DEBUG</code> messages <strong>from my package only</strong>.</p>
  
  <p>I tried several things but I feel I'm just trying random things from the internet as I can't find an authoritative reference about how to obtain this and I'm having hard time wrapping my head around the incredibly confusing state of the log facilities for Java...</p>
  
  <p>I'm asking about both Storm and Flink as I suspect that the root of my problem is the same but I might be wrong. Also I apologize if I don't provide a minimal example but there's really nothing to provide here.</p>
  
  <p>Please let me know if you need additional details.</p>