title: logback DailyRolling seems does not work for me
body: <p>I am using a logback dailyroller, the application is up and running always, but it seems it does not create log file every day as I expected. below is my setting,
  My question is if my application is running but if there is no output to the log file, will the daily log file still be created every day?</p>
  <pre><code>&lt;property name=&quot;LOGS&quot; value=&quot;./log&quot; /&gt;
  
  &lt;appender name=&quot;RollingFile&quot;
      class=&quot;ch.qos.logback.core.rolling.RollingFileAppender&quot;&gt;
      &lt;file&gt;${LOGS}/out.log&lt;/file&gt;
      &lt;encoder class=&quot;ch.qos.logback.classic.encoder.PatternLayoutEncoder&quot;&gt;
              &lt;Pattern&gt;%d %p %C{1.} [%t] %m%n&lt;/Pattern&gt;
      &lt;/encoder&gt;
  
      &lt;rollingPolicy
          class=&quot;ch.qos.logback.core.rolling.TimeBasedRollingPolicy&quot;&gt;
          &lt;!-- rollover daily and when the file reaches 10 MegaBytes --&gt;
          &lt;fileNamePattern&gt;${LOGS}/%d{yyyy-MM-dd}.gz
          &lt;/fileNamePattern&gt;
          &lt;maxHistory&gt;30&lt;/maxHistory&gt;
          &lt;!--timeBasedFileNamingAndTriggeringPolicy
              class=&quot;ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP&quot;&gt;
              &lt;maxFileSize&gt;40MB&lt;/maxFileSize&gt;
          &lt;/timeBasedFileNamingAndTriggeringPolicyi--&gt;
      &lt;/rollingPolicy&gt;
  &lt;/appender&gt;
  </code></pre>