title: Any reason why pid is not created and process does not start?
body: <p>I am trying to use python-daemon with this script to start and stop the run of some code in the background. (ultimate goal is to have this in an AWS instance).</p>
  
  <p>For some reason that escapes me the pid file is not being generated and I think the process is not running. </p>
  
  <p>Python script:</p>
  
  <pre><code>#standard python libs
  import logging
  import time
  
  #third party libs
  from daemon import runner
  
  class App():
  
      def __init__(self):
          self.stdin_path = '/dev/null'
          self.stdout_path = '/dev/tty'
          self.stderr_path = '/dev/tty'
          self.pidfile_path = '/Users/NAME/Documents/workspace/RandomThings/testdaemon.pid'
          self.pidfile_timeout = 5
  
      def run(self):
          while True:
              #Note that logger level needs to be set to logging.DEBUG before this shows up in the logs
              logger.debug("Debug message")
              logger.info("Info message")
              logger.warn("Warning message")
              logger.error("Error message")
              #Main code goes here ...
              sst=myClass()
              sst.run()
              time.sleep(10)
  
  app = App()
  logger = logging.getLogger("DaemonLog")
  logger.setLevel(logging.INFO)
  formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
  handler = logging.FileHandler("/Users/NAME/Documents/workspace/RandomThings/testdaemon.log")
  handler.setFormatter(formatter)
  logger.addHandler(handler)
  
  daemon_runner = runner.DaemonRunner(app)
  #This ensures that the logger file handle does not get closed during daemonization
  daemon_runner.daemon_context.files_preserve=[handler.stream]
  daemon_runner.do_action()
  </code></pre>
  
  <p>The in the shell (OSX) I do:</p>
  
  <p>python daemon.py start  >>>> this runs but the pid file is not created (tried sudo as well)
  python daemon.py stop   >>>> returns error:</p>
  
  <blockquote>
    <blockquote>
      <p>Traceback (most recent call last):   File "SST_daemon.py", line 68, in 
          daemon_runner.do_action()   File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/daemon/runner.py",
      line 189, in do_action
          func(self)   File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/daemon/runner.py",
      line 152, in _stop
          u"PID file %(pidfile_path)r not locked" % vars()) daemon.runner.DaemonRunnerStopFailureError: PID file
      '/Users/josefernandes/Documents/workspace/RandomThings/testdaemon.pid'
      not locked</p>
    </blockquote>
  </blockquote>
  
  <p>I have tried to fix this for hours with not results so far.</p>
  
  <p>Any reason why this is not working? </p>
  
  <p><strong>Any help is much much appreciated!!!!!</strong></p>