Merge pull request #26 from dave-shawley/signal-safe

Runner: remove logging from signal handler.

docs/history.rst

@@ -3,6 +3,14 @@
 Release History
 ===============
 
+`Next Release`_
+---------------
+- Remove logging from the signal handler.  Logger's cannot safely be used
+  from within signal handlers.  See `Thread Safety`_ in the logging module
+  documentation for details.
+
+.. _Thread Safety: https://docs.python.org/3/library/logging.html#thread-safety
+
 `1.5.0`_ (29 Jan 2018)
 ----------------------
 - Enable port reuse for Tornado versions newer than 4.3.

sprockets/http/runner.py

@@ -139,7 +139,6 @@ class Runner(object):
         iol.start()
 
     def _on_signal(self, signo, frame):
-        self.logger.info('signal %s received, stopping', signo)
         ioloop.IOLoop.instance().add_callback_from_signal(self._shutdown)
 
     def _shutdown(self):