def doRollover(self):
        if self.stream:
            self.stream.close()
            self.stream = None
        if self.backupCount > 0:
            for i in range(self.backupCount - 1, 0, -1):
                sfn = "%s.%d" % (self.baseFilename, i)
                dfn = "%s.%d" % (self.baseFilename, i + 1)
                if os.path.exists(sfn):
                    #print "%s -> %s" % (sfn, dfn)
                    if os.path.exists(dfn):
                        os.remove(dfn)
                    os.rename(sfn, dfn)
            dfn = self.baseFilename + ".1"
            if os.path.exists(dfn):
                os.remove(dfn)
            os.rename(self.baseFilename, dfn)
            #print "%s -> %s" % (self.baseFilename, dfn)
        self.mode = 'w'
        self.stream = self._open()
If max_instances was set for autoscaling, clean up zookeeper
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/logging/handlers.py/RotatingFileHandler.doRollover--crossover with--dataset/ETHPy150Open Yelp/paasta/paasta_itests/environment.py/_clean_up_zookeeper_autoscaling