[BugFix] Remove default multiproc executor collective_rpc timeout (vllm-project#17000)

Signed-off-by: Nick Hill <nhill@redhat.com>

Author: njhill

vllm/v1/executor/multiproc_executor.py

@@ -38,7 +38,7 @@
 POLLING_TIMEOUT_MS = 5000
 POLLING_TIMEOUT_S = POLLING_TIMEOUT_MS // 1000
 
-EXECUTE_MODEL_TIMEOUT_S = 30
+EXECUTE_MODEL_TIMEOUT_S = 40
 
 
 class MultiprocExecutor(Executor):
@@ -151,16 +151,16 @@ def execute_model(
 
     def collective_rpc(self,
                        method: Union[str, Callable],
-                       timeout: Optional[float] = 180.0,
+                       timeout: Optional[float] = None,
                        args: tuple = (),
                        kwargs: Optional[dict] = None,
                        rank0_reply_only: bool = False) -> list[Any]:
-        start_time = time.monotonic()
-        kwargs = kwargs or {}
-
         if self.is_failed:
             raise RuntimeError("Executor failed.")
 
+        deadline = None if timeout is None else time.monotonic() + timeout
+        kwargs = kwargs or {}
+
         # NOTE: If the args are heterogeneous, then we pack them into a list,
         # and unpack them in the method of every worker, because every worker
         # knows their own rank.
@@ -176,8 +176,8 @@ def collective_rpc(self,
             workers = (self.workers[0], ) if rank0_reply_only else self.workers
             responses = [None] * len(workers)
             for w in workers:
-                dequeue_timeout = timeout - (time.monotonic() - start_time
-                                             ) if timeout is not None else None
+                dequeue_timeout = None if deadline is None else (
+                    deadline - time.monotonic())
                 status, result = w.worker_response_mq.dequeue(
                     timeout=dequeue_timeout, cancel=self.shutdown_event)