Don't add signal handler multiple times

jupyterhub · Dec 26, 2018 · bbc3d9e · bbc3d9e
1 parent 37442ba
commit bbc3d9e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/simpervisor/atexitasync.py b/simpervisor/atexitasync.py
@@ -12,10 +12,12 @@
 signal_handler_set = False
 
 def add_handler(handler):
+    global signal_handler_set
     if not signal_handler_set:
         loop = asyncio.get_event_loop()
         loop.add_signal_handler(signal.SIGINT, _handle_signal, signal.SIGINT)
         loop.add_signal_handler(signal.SIGTERM, _handle_signal, signal.SIGTERM)
+        signal_handler_set = True
     _handlers.append(handler)
 
 def remove_handler(handler):