title: Logback doesn't print any log in Weblogic 12c
body: <p>I want to move to <code>Logback</code> from <code>java.util.logging.Logger</code>. First I use this in  my <code>dependency.jar</code> file. <code>MyApp.ear</code> is still use <code>java logger</code>.</p>
  
  <p>Below is <code>logback.xml</code>.</p>
  
  <pre><code>&lt;configuration&gt;
    &lt;appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"&gt;
      &lt;!-- encoders are assigned the type
       ch.qos.logback.classic.encoder.PatternLayoutEncoder by default --&gt;
      &lt;encoder&gt;
        &lt;pattern&gt;%d{HH:mm:ss.SSS} [%thread] %-5level %logger{5} - %msg%n  
        &lt;/pattern&gt;
      &lt;/encoder&gt;
    &lt;/appender&gt;
    &lt;root level="WARN"&gt;          
       &lt;appender-ref ref="STDOUT" /&gt;
    &lt;/root&gt;  
  &lt;/configuration&gt;
  </code></pre>
  
  <p>I added below depended jar files to my <code>ant build</code> file.</p>
  
  <pre><code>  &lt;pathelement location="${global.lib}/slf4j-api-1.6.4.jar"/&gt;
    &lt;pathelement location="${global.lib}/logback-classic-1.0.1.jar"/&gt;
  </code></pre>
  
  <p>I use <code>weblogic 12C</code>. Now my log level is <code>WARN</code>. But still the <code>INFO</code> logs are printing. Which means it still uses <code>java logger</code>. I suspect the <code>dependent.jar</code> <code>logback</code> <code>log</code> is overwritten by <code>java logger</code> in <code>MyApp.ear</code>.</p>
  
  <p>I am not sure is there any place to modify in the <code>weblogic 12C</code>to enable it.</p>
  
  <p><code>logback.xml</code> is available inside the <code>dependency.jar</code>.</p>