logback: TimeBasedRollingPolicy daily rolling works, but all old log files are deleted

Question

I have used RollingFileAppender with a TimeBasedRollingPolicy, so that at midnight a new logfile is created and the old logs 10 days are to be kept. At midnight a new logfile is created, but the old one will be deleted immediately, sometimes even after a few minutes.

public static void init(String logfilename,String loggername,String pattern) throws Exception {
  LoggerContext context = (LoggerContext)LoggerFactory.getILoggerFactory();

  logfilename = new File(logfilename).getCanonicalPath();

  PatternLayoutEncoder encoder = new PatternLayoutEncoder();
  encoder.setContext(context);
  encoder.setPattern(pattern);
  encoder.start();

  RollingFileAppender<ILoggingEvent> rollingFileAppender = new RollingFileAppender<>();
  rollingFileAppender.setContext(context);
  rollingFileAppender.setName(loggername);
  rollingFileAppender.setEncoder(encoder);
  rollingFileAppender.setAppend(true);
  rollingFileAppender.setFile(logfilename+".log");

  TimeBasedRollingPolicy<ILoggingEvent> rollingPolicy = new TimeBasedRollingPolicy<>();
  rollingPolicy.setContext(context);
  rollingPolicy.setParent(rollingFileAppender);
  rollingPolicy.setFileNamePattern(logfilename+".%d{yyyy-MM-dd}.log");
  rollingPolicy.setMaxHistory(10);
  rollingPolicy.setTotalSizeCap(FileSize.valueOf("100MB"));
  rollingPolicy.setCleanHistoryOnStart(false);
  rollingPolicy.start();

  rollingFileAppender.setRollingPolicy(rollingPolicy);     
  rollingFileAppender.start();

  Logger logger = (Logger)LoggerFactory.getLogger(loggername);
  logger.setAdditive(false);
  logger.setLevel(Level.INFO);
  logger.detachAndStopAllAppenders();
  logger.addAppender(rollingFileAppender);
}

I think in this case MaxHistory should mean 10 Days, but it don't work.

Answer 1

I have found the reason. It was my mistake. I had an old Process which has cleaned the directory every hour. :). After disabling, logback works as expected. You can use the code above as example. it works fine.