Reactor thread raises Empty error when user invocations cancelled

[sancar]

Related stack trace. Since user invocation cancellation is expected behaviour we should not see Empty error .

2017-02-17 02:59:45,158 [ERROR] [   12] [-:-] reactor.py:44 'Error in Reactor Thread'
'Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/hazelcast/reactor.py", line 38, in _loop
    self._check_timers()
  File "/usr/local/lib/python2.7/dist-packages/hazelcast/reactor.py", line 58, in _check_timers
    self._timers.get_nowait()
  File "/usr/lib/python2.7/Queue.py", line 190, in get_nowait
    return self.get(False)
  File "/usr/lib/python2.7/Queue.py", line 165, in get
    raise Empty
Empty'