From cf29fe9e781b68b36102aebe1decf83e87b9e829 Mon Sep 17 00:00:00 2001
From: fzyzcjy <5236035+fzyzcjy@users.noreply.github.com>
Date: Fri, 28 Mar 2025 13:17:30 +0800
Subject: [PATCH] Fix Engine error when enabling DP attention (#4648)

---
 python/sglang/srt/server_args.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/python/sglang/srt/server_args.py b/python/sglang/srt/server_args.py
index a04882736..f8d5512cb 100644
--- a/python/sglang/srt/server_args.py
+++ b/python/sglang/srt/server_args.py
@@ -1220,10 +1220,10 @@ class PortArgs:
             port_base = int(dist_init_port) + 1
             if dp_rank is None:
                 scheduler_input_port = (
-                    port_base + 2
+                    port_base + 3
                 )  # TokenizerManager to DataParallelController
             else:
-                scheduler_input_port = port_base + 2 + 1 + dp_rank
+                scheduler_input_port = port_base + 3 + 1 + dp_rank
 
             return PortArgs(
                 tokenizer_ipc_name=f"tcp://{dist_init_host}:{port_base}",