throw ValueError for DoRA adapters (#22125)

Co-authored-by: Ethan (Yusheng) Su <yushengsu.thu@gmail.com>

python/sglang/srt/lora/lora_config.py

@@ -42,6 +42,7 @@ class LoRAConfig:
         self.target_modules = self.hf_config["target_modules"]
         self.r = self.hf_config["r"]
         self.lora_alpha = self.hf_config["lora_alpha"]
+        self.use_dora = self.hf_config.get("use_dora", False)
 
         # Filter fake added tokens: tokens with ID < base_vocab_size are already
         # part of the base vocabulary and should not be treated as added tokens.
@@ -58,13 +59,6 @@ class LoRAConfig:
             len(self.added_tokens_config) if self.added_tokens_config is not None else 0
         )
 
-        if self.lora_added_tokens_size > 0:
-            raise ValueError(
-                f"LoRA adapter has {self.lora_added_tokens_size} added tokens, "
-                f"but added tokens are not supported yet. "
-                f"Added tokens: {self.added_tokens_config}"
-            )
-
     @classmethod
     def from_dict(
         cls,

python/sglang/srt/lora/lora_manager.py

@@ -191,7 +191,12 @@ class LoRAManager:
         """
         if lora_config.lora_added_tokens_size > 0:
             raise ValueError(
-                f"LoRA serving currently doesn't support adapters that add tokens to the vocabulary"
+                f"Failed to load {lora_ref.lora_name} because LoRA serving currently doesn't support adapters that add tokens to the vocabulary"
+            )
+
+        if lora_config.use_dora:
+            raise ValueError(
+                f"Failed to load {lora_ref.lora_name} because LoRA serving currently doesn't support DoRA adapters"
             )
 
         # Check if this LoRA adapter is already loaded