From 961150d464c1249c1e8c296299bbbcd9b172c9cb Mon Sep 17 00:00:00 2001
From: shuwenn <47200617+alphabetc1@users.noreply.github.com>
Date: Wed, 1 Apr 2026 15:25:10 +0800
Subject: [PATCH] fix: pre-init tokenizer_manager to avoid AttributeError in
 shutdown

---
 python/sglang/srt/entrypoints/engine.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/python/sglang/srt/entrypoints/engine.py b/python/sglang/srt/entrypoints/engine.py
index 1f568d42909e..30480ed01e87 100644
--- a/python/sglang/srt/entrypoints/engine.py
+++ b/python/sglang/srt/entrypoints/engine.py
@@ -180,6 +180,10 @@ def __init__(self, **kwargs):
         self.server_args = server_args
         logger.info(f"{server_args=}")
 
+        # Pre-initialize tokenizer_manager so the atexit handler in
+        # shutdown() won't hit AttributeError.
+        self.tokenizer_manager = None
+
         # Shutdown the subprocesses automatically when the program exits
         atexit.register(self.shutdown)