code: public void setLogFileDir(String logDirName) {
          File logDir = new File(logDirName);
          if (!logDir.isAbsolute()) {
              logDir = new File(serverBaseDir, logDirName);
          }
  
          this.logFileDir = logDirName;
          if (started) {
              configuration.setLogFileDir(logDir.getAbsolutePath());
          }
      }
docs: Sets the log dir.
  @param logDirName the directory name