From 43ad05907c736d5befd980507acc03c43d35100e Mon Sep 17 00:00:00 2001
From: Lianmin Zheng <lianminzheng@gmail.com>
Date: Mon, 20 Oct 2025 17:41:19 -0700
Subject: [PATCH] [Auto Sync] Update scheduler.py, server_args.py (20251020)
 (#11875)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Kan Wu <wukanustc@gmail.com>
---
 python/sglang/srt/managers/scheduler.py | 9 ++++++++-
 python/sglang/srt/server_args.py        | 7 +++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/python/sglang/srt/managers/scheduler.py b/python/sglang/srt/managers/scheduler.py
index 78457abc8..9b1cb19d0 100644
--- a/python/sglang/srt/managers/scheduler.py
+++ b/python/sglang/srt/managers/scheduler.py
@@ -306,6 +306,9 @@ class Scheduler(
         self.dp_size = server_args.dp_size
         self.schedule_policy = server_args.schedule_policy
         self.enable_priority_scheduling = server_args.enable_priority_scheduling
+        self.abort_on_priority_when_disabled = (
+            server_args.abort_on_priority_when_disabled
+        )
         self.schedule_low_priority_values_first = (
             server_args.schedule_low_priority_values_first
         )
@@ -1560,7 +1563,11 @@ class Scheduler(
                 req.priority = sys.maxsize
             else:
                 req.priority = -sys.maxsize - 1
-        elif not self.enable_priority_scheduling and req.priority is not None:
+        elif (
+            not self.enable_priority_scheduling
+            and req.priority is not None
+            and self.abort_on_priority_when_disabled
+        ):
             abort_req = AbortReq(
                 finished_reason={
                     "type": "abort",
diff --git a/python/sglang/srt/server_args.py b/python/sglang/srt/server_args.py
index 6c9d7a8d1..25cf28f31 100644
--- a/python/sglang/srt/server_args.py
+++ b/python/sglang/srt/server_args.py
@@ -220,6 +220,7 @@ class ServerArgs:
     max_prefill_tokens: int = 16384
     schedule_policy: str = "fcfs"
     enable_priority_scheduling: bool = False
+    abort_on_priority_when_disabled: bool = False
     schedule_low_priority_values_first: bool = False
     priority_scheduling_preemption_threshold: int = 10
     schedule_conservativeness: float = 1.0
@@ -1771,6 +1772,12 @@ class ServerArgs:
             default=ServerArgs.enable_priority_scheduling,
             help="Enable priority scheduling. Requests with higher priority integer values will be scheduled first by default.",
         )
+        parser.add_argument(
+            "--abort-on-priority-when-disabled",
+            action="store_true",
+            default=ServerArgs.abort_on_priority_when_disabled,
+            help="If set, abort requests that specify a priority when priority scheduling is disabled.",
+        )
         parser.add_argument(
             "--schedule-low-priority-values-first",
             action="store_true",