fix(logger): prevent duplicate handlers and disable propagation to avoid repeated log lines\n\nCo-authored-by: openhands <openhands@all-hands.dev>

Author: openhands-agent

benchmesh-serial-service/src/benchmesh_service/logger.py

@@ -1,26 +1,33 @@
 import logging
 
+
 def setup_logger():
     logger = logging.getLogger("benchmesh_service")
+    # Avoid adding duplicate handlers if called multiple times
+    if getattr(logger, "_is_configured", False):
+        return logger
+
     logger.setLevel(logging.DEBUG)
 
-    # Create file handler
     fh = logging.FileHandler("benchmesh_service.log")
     fh.setLevel(logging.DEBUG)
 
-    # Create console handler
     ch = logging.StreamHandler()
     ch.setLevel(logging.INFO)
 
-    # Create formatter and add it to the handlers
     formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
     fh.setFormatter(formatter)
     ch.setFormatter(formatter)
 
-    # Add the handlers to the logger
     logger.addHandler(fh)
     logger.addHandler(ch)
 
+    # Prevent propagation to root logger (avoids duplicate logs via root handlers)
+    logger.propagate = False
+    # Mark as configured
+    logger._is_configured = True
+
     return logger
 
+
 logger = setup_logger()