From 3f0814974cfead3bdb4eb0973e7cf46997395b8e Mon Sep 17 00:00:00 2001
From: fzyzcjy <5236035+fzyzcjy@users.noreply.github.com>
Date: Fri, 22 May 2026 14:10:57 +0800
Subject: [PATCH] Fix disaggregation bootstrap server lifetime (#25982)

---
 python/sglang/srt/managers/tokenizer_manager.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python/sglang/srt/managers/tokenizer_manager.py b/python/sglang/srt/managers/tokenizer_manager.py
index 8d5895a40..5f6378553 100644
--- a/python/sglang/srt/managers/tokenizer_manager.py
+++ b/python/sglang/srt/managers/tokenizer_manager.py
@@ -454,7 +454,8 @@ class TokenizerManager(TokenizerControlMixin, TokenizerManagerScoreMixin):
         self.disaggregation_mode = DisaggregationMode(
             self.server_args.disaggregation_mode
         )
-        start_disagg_service(self.server_args)
+        # Keep a reference so the bootstrap server is not garbage-collected.
+        self.bootstrap_server = start_disagg_service(self.server_args)
         # Single-source counter for auto-assigning fake bootstrap_room.
         self.fake_bootstrap_room_counter = 0