Update processor_bert.py

processor_bert.py

@@ -29,9 +29,23 @@ DEFAULT_BATCH = 64
 
 
 def preload_models():
-    """App startup pe background thread mein models load karo."""
-    threading.Thread(target=_load_models, daemon=True).start()
-
+    """Lazily load models — thread-safe, strict single initialization."""
+    global _classifier, _model_ready
+    
+    # 🚨 GOOGLE-LEVEL FIX: Everything critical must be INSIDE the lock
+    with _load_lock:
+        if _classifier is None:
+            logger.info("Initializing BERT pipeline...")
+            
+            # Initialization logic goes HERE, not outside
+            _classifier = pipeline(
+                task="text-classification",
+                model=MODEL_NAME,
+                device=-1, # CPU
+                top_k=1
+            )
+            _model_ready = True
+            logger.info("BERT pipeline ready.")
 
 def _load_models():
     """Lazily load models — thread-safe, sirf ek baar load hoga."""