stability

core/enhanced_cob_websocket.py

@@ -175,6 +175,11 @@ class EnhancedCOBWebSocket:
     async def start(self):
         """Start COB WebSocket connections"""
         logger.info("Starting Enhanced COB WebSocket system")
+
+        # Idempotence guard: avoid spawning duplicate tasks if already started
+        if any(task for task in self.websocket_tasks.values() if task and not task.done()):
+            logger.warning("Enhanced COB WebSocket already started - skipping duplicate start")
+            return
         
         # Initialize REST session for fallback
         await self._init_rest_session()
@@ -386,9 +391,12 @@ class EnhancedCOBWebSocket:
             await self._start_rest_fallback(symbol)
             return
         
-        # Cancel existing task if running
-        if symbol in self.websocket_tasks and not self.websocket_tasks[symbol].done():
-            self.websocket_tasks[symbol].cancel()
+        # If a task exists and is still running, do not spawn another
+        if symbol in self.websocket_tasks:
+            existing = self.websocket_tasks[symbol]
+            if existing and not existing.done():
+                logger.warning(f"WebSocket task already running for {symbol} - skipping restart")
+                return
         
         # Start new WebSocket task
         self.websocket_tasks[symbol] = asyncio.create_task(