[Bugfix] fix --scheduling-policy=priority & n>1 crashes engine

Signed-off-by: chaunceyjiang <[email protected]>

Author: chaunceyjiang

vllm/v1/core/sched/request_queue.py

@@ -147,7 +147,9 @@ def __init__(self) -> None:
 
     def add_request(self, request: Request) -> None:
         """Add a request to the queue according to priority policy."""
-        heapq.heappush(self._heap, (request.priority, request.arrival_time, request))
+        heapq.heappush(
+            self._heap, (request.priority, request.arrival_time, id(request))
+        )
 
     def pop_request(self) -> Request:
         """Pop a request from the queue according to priority policy."""