Use thread traceback logger from Pykka 1.1

docs/changes.rst

@@ -10,6 +10,10 @@ v0.13.0 (in development)
 
 (in development)
 
+**Dependencies**
+
+- Pykka >= 1.1 is now required.
+
 **Core**
 
 - Log a warning if a track isn't playable to make it more obvious that backend

mopidy/__main__.py

@@ -9,6 +9,8 @@ import sys
 import gobject
 gobject.threads_init()
 
+import pykka.debug
+
 
 # Extract any non-GStreamer arguments, and leave the GStreamer arguments for
 # processing by GStreamer. This needs to be done before GStreamer is imported,
@@ -48,9 +50,7 @@ def main():
     options = parse_options()
 
     if options.debug_thread or settings.DEBUG_THREAD:
-        debug_thread = process.DebugThread()
-        debug_thread.start()
-        signal.signal(signal.SIGUSR1, debug_thread.handler)
+        signal.signal(signal.SIGUSR1, pykka.debug.log_thread_tracebacks)
 
     try:
         log.setup_logging(options.verbosity_level, options.save_debug_log)

mopidy/utils/process.py

@@ -2,10 +2,8 @@ from __future__ import unicode_literals
 
 import logging
 import signal
-import sys
 import thread
 import threading
-import traceback
 
 from pykka import ActorDeadError
 from pykka.registry import ActorRegistry
@@ -79,29 +77,3 @@ class BaseThread(threading.Thread):
 
     def run_inside_try(self):
         raise NotImplementedError
-
-
-class DebugThread(threading.Thread):
-    daemon = True
-    name = 'DebugThread'
-
-    event = threading.Event()
-
-    def handler(self, signum, frame):
-        logger.info('Got %s signal', SIGNALS[signum])
-        self.event.set()
-
-    def run(self):
-        while True:
-            self.event.wait()
-            threads = dict((t.ident, t.name) for t in threading.enumerate())
-
-            for ident, frame in sys._current_frames().items():
-                if self.ident != ident:
-                    stack = ''.join(traceback.format_stack(frame))
-                    logger.debug(
-                        'Current state of %s (%s):\n%s',
-                        threads.get(ident, '?'), ident, stack)
-                del frame
-
-            self.event.clear()

requirements/core.txt

@@ -1,2 +1,2 @@
-Pykka >= 1.0
+Pykka >= 1.1
 # Available as python-pykka from apt.mopidy.com