[Bugfix] fix model_config deletion (#22281)

python/sglang/srt/entrypoints/http_server.py

@@ -636,10 +636,7 @@ async def server_info():
         await _global_state.tokenizer_manager.get_internal_state()
     )
 
-    # This field is not serializable.
-    if hasattr(_global_state.tokenizer_manager.server_args, "model_config"):
-        del _global_state.tokenizer_manager.server_args.model_config
-
+    # server_args.model_config is not serializable but should be excluded by asdict.
     return {
         **dataclasses.asdict(_global_state.tokenizer_manager.server_args),
         **_global_state.scheduler_info,

python/sglang/srt/managers/scheduler.py

@@ -3157,7 +3157,7 @@ class Scheduler(
         return success
 
     def get_internal_state(self, recv_req: GetInternalStateReq):
-        ret = vars(get_global_server_args())
+        ret = dict(vars(get_global_server_args()))  # vars returns a ref to obj.__dict__
         ret["last_gen_throughput"] = self.last_gen_throughput
         ret["memory_usage"] = {
             "weight": round(self.tp_worker.model_runner.weight_load_mem_usage, 2),