线程安全的自定义记录器

Question

我不明白为什么我的自定义记录器在多个线程中使用时也会导致OSError [Errno 24] Too many open files。

我已经重新发明了一个轮子，每次写入文件后都会关闭文件处理器。

在我的代码中，我为每个记录器记录使用threading.RLock()。

class RootLogger():
   def __init__(self):
       self.logger = None

   def set_config(self, name, logfile):
       self.logger = logging.getLogger(name)
       formatter = logging.Formatter('%(asctime)s - [%(name)s] [%(levelname)s] %(message)s',
                                  "%Y-%m-%d %H:%M:%S")
       handler = logging.FileHandler(logfile, mode='a')
       handler.setFormatter(formatter)
       self.logger.setLevel(logging.DEBUG)
       self.logger.addHandler(handler)
       self.logger.setLevel(logging.DEBUG)
       return self


   def handler_close(self):
       self.logger.handlers[0].close()

   def info(self, msg):
       self.logger.info(msg)
       self.handler_close()

   def debug(self, msg):
       self.logger.debug(msg)
       self.handler_close()

   def error(self, msg):
       self.logger.error(msg)
       self.handler_close()

  def warning(self, msg):
      self.logger.warning(msg)
      self.handler_close()

  def critical(self, msg):
      self.logger.warning(msg)
      self.handler_close()