title: Not create new log file once start my service with using log4j2
body: <p>following is my configration of log4j2:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;Configuration status="trace" name="MyApp" packages="com.swimap.base.launcher.log"&gt;
    &lt;Appenders&gt;
      &lt;RollingFile name="RollingFile" fileName="logs/app-${date:MM-dd-yyyy-HH-mm-ss-SSS}.log"
                   filePattern="logs/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz"&gt;
        &lt;PatternLayout&gt;
          &lt;Pattern&gt;%d %p %c{1.} [%t] %m%n&lt;/Pattern&gt;
        &lt;/PatternLayout&gt;
        &lt;Policies&gt;
          &lt;SizeBasedTriggeringPolicy size="1 KB"/&gt;
        &lt;/Policies&gt;
        &lt;DefaultRolloverStrategy max="3"/&gt;
      &lt;/RollingFile&gt;
    &lt;/Appenders&gt;
    &lt;Loggers&gt;
      &lt;Root level="trace"&gt;
        &lt;AppenderRef ref="RollingFile"/&gt;
      &lt;/Root&gt;
    &lt;/Loggers&gt;
  &lt;/Configuration&gt;
  </code></pre>
  
  <p>the issue is that each time when start up my service, a new log will be created even the old one has not reached the specific size. If the program restart frequently, i will got many log files end with ‘.log’ which never be compressed.</p>
  
  <p>the logs i got like this:</p>
  
  <pre><code>/log4j2/logs
  /log4j2/logs/2017-07
  /log4j2/logs/2017-07/app-07-18-2017-1.log.gz
  /log4j2/logs/2017-07/app-07-18-2017-2.log.gz
  /log4j2/logs/2017-07/app-07-18-2017-3.log.gz
  /log4j2/logs/app-07-18-2017-20-42-06-173.log
  /log4j2/logs/app-07-18-2017-20-42-12-284.log
  /log4j2/logs/app-07-18-2017-20-42-16-797.log
  /log4j2/logs/app-07-18-2017-20-42-21-269.log
  </code></pre>
  
  <p>someone can tell me how can i append log to the exists log file when i start up my program? much thanks whether u can help me closer to the answer!! </p>