gistfile1.txt

 Exception in thread foo1:
 Traceback (most recent call last):
   File "foo../lib/python3.4/threading.py", line 911, in _bootstrap_inner
     self.run()
   File "foo../lib/python3.4/site-packages/anycast_healthchecker/servicecheck.py", line 189, in run
     if not self._ip_assigned():
   File "foo../lib/python3.4/site-packages/anycast_healthchecker/servicecheck.py", line 93, in _ip_assigned
     timeout=1)
   File "foo../lib/python3.4/subprocess.py", line 612, in check_output
     output, unused_err = process.communicate()
   File "foo../lib/python3.4/subprocess.py", line 962, in communicate
     stdout, stderr = self._communicate(input, endtime, timeout)
   File "foo../lib/python3.4/subprocess.py", line 1614, in _communicate
     selector.register(self.stdout, selectors.EVENT_READ)
   File "foo../lib/python3.4/selectors.py", line 342, in register
     key = super().register(fileobj, events, data)
   File "foo../lib/python3.4/selectors.py", line 228, in register
     key = SelectorKey(fileobj, self._fileobj_lookup(fileobj), events, data)
   File "foo../lib/python3.4/selectors.py", line 215, in _fileobj_lookup
     return _fileobj_to_fd(fileobj)
   File "foo../lib/python3.4/selectors.py", line 39, in _fileobj_to_fd                                                                                                                                                                                                                                                         
     "{!r}".format(fileobj)) from None
 ValueError: Invalid file object: <_io.TextIOWrapper name=11 encoding='UTF-8'>