salt-master error

2016-06-06 18:42:37,982 [salt.log.setup                                       ][ERROR   ][8630] An un-handled exception was caught by salt's global exception handler:
OSError: [Errno 3] No such process
Traceback (most recent call last):
  File "/usr/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib/python2.7/multiprocessing/util.py", line 321, in _exit_function
    p._popen.terminate()
  File "/usr/lib/python2.7/multiprocessing/forking.py", line 171, in terminate
    os.kill(self.pid, signal.SIGTERM)
OSError: [Errno 3] No such process
2016-06-06 18:42:38,037 [salt.config                              ][INFO    ][9627] Found minion id from generate_minion_id(): saltmaster.local