[scripts][worker] Do not use a global for logger

beat/core/scripts/worker.py

@@ -85,7 +85,7 @@ from ..version import __version__
 from ..worker import WorkerController
 
 stop = False
-logger = None
+logger = logging.getLogger(__name__)
 
 
 # ----------------------------------------------------------
@@ -251,9 +251,6 @@ def main(user_input=None):
         beat_core_logger.setLevel(logging.WARNING)
         beat_backend_logger.setLevel(logging.WARNING)
 
-    global logger
-    logger = logging.getLogger(__name__)
-
     # Check the prefix path
     prefix = args["--prefix"] if args["--prefix"] is not None else "."
     if not os.path.exists(prefix):