remove thread during log

analytics.py

@@ -9,13 +9,10 @@ import psycopg2
 
 file_access_temp = []
 
-# Thread-safe singleton metaclass.
+# singleton metaclass.
 class SingletonMeta(type):
     _instances = {}
-    _lock = threading.Lock()  # Ensures thread safety.
-
     def __call__(cls, *args, **kwargs):
-        with cls._lock:
         if cls not in cls._instances:
             instance = super().__call__(*args, **kwargs)
             cls._instances[cls] = instance

app.py

@@ -269,10 +269,7 @@ def serve_file(subpath):
         logging = True
 
     if logging:
-        threading.Thread(
-            target=a.log_file_access,
-            args=(subpath, filesize, mime, ip_address, user_agent, session['device_id'], bool(cached), )
-        ).start()
+        a.log_file_access(subpath, filesize, mime, ip_address, user_agent, session['device_id'], bool(cached))
 
     return response