TimedRotatingFileHandler now calculates next rollover from previous rollover rather than current time.

Author: vsajip

Lib/logging/handlers.py

@@ -282,7 +282,7 @@ def doRollover(self):
             self.stream = codecs.open(self.baseFilename, 'w', self.encoding)
         else:
             self.stream = open(self.baseFilename, 'w')
-        self.rolloverAt = int(time.time()) + self.interval
+        self.rolloverAt = self.rolloverAt + self.interval
 
 class SocketHandler(logging.Handler):
     """