shutting down...

[JarvisZhu]

shutting down...

[BambooGreen]

I encounter the same error:-(

[snowcrumble]

I encounter the same error too :-(

[Ivlyth]

I encounter the same error too too too 。。。 :-(

[hornsey]

I think it's normal。

    t = Timer(duration, self.stop)
     t.start()

274 def stop(self):
275 """Stops the monitor and all associated threads.
276 """
277 if args.quiet==False:
278 print "shutting down..."
279 for t in self.threads:
280 t.stop()
281 self.active = False

[zhangjianpinghik]

I encounter the same error too :-(