Fast restart (#5378)

* dont wait so long for queues

* implement stop methods for comms

* set the detection events on exit and return early from processing

* handle the stop event in the broadcast threads

* short circuit the detection process exit code if it already exited

* some logging for stats thread

* just keep the log process alive 1 second after the last log message

* ensure the multiprocessing queues are emptied and closed

* Update frigate/log.py

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

* Update frigate/log.py

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

* mypy fixes

---------

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

frigate/log.py

@@ -2,11 +2,16 @@
 import logging
 import threading
 import os
+import signal
 import queue
+import multiprocessing as mp
 from multiprocessing.queues import Queue
 from logging import handlers
+from typing import Optional
+from types import FrameType
 from setproctitle import setproctitle
-from typing import Deque
+from typing import Deque, Optional
+from types import FrameType
 from collections import deque
 
 from frigate.util import clean_camera_user_pass
@@ -34,10 +39,21 @@ def log_process(log_queue: Queue) -> None:
     threading.current_thread().name = f"logger"
     setproctitle("frigate.logger")
     listener_configurer()
+
+    stop_event = mp.Event()
+
+    def receiveSignal(signalNumber: int, frame: Optional[FrameType]) -> None:
+        stop_event.set()
+
+    signal.signal(signal.SIGTERM, receiveSignal)
+    signal.signal(signal.SIGINT, receiveSignal)
+
     while True:
         try:
-            record = log_queue.get(timeout=5)
+            record = log_queue.get(timeout=1)
         except (queue.Empty, KeyboardInterrupt):
+            if stop_event.is_set():
+                break
             continue
         logger = logging.getLogger(record.name)
         logger.handle(record)