add clear messages for deprecated models (vllm-project#21424)

Signed-off-by: youkaichao <youkaichao@gmail.com>

Author: youkaichao

vllm/model_executor/model_loader/utils.py

@@ -25,7 +25,8 @@
                                                  as_reward_model,
                                                  as_seq_cls_model)
 from vllm.model_executor.models.interfaces import SupportsQuant
-from vllm.model_executor.models.registry import _TRANSFORMERS_MODELS
+from vllm.model_executor.models.registry import (_PREVIOUSLY_SUPPORTED_MODELS,
+                                                 _TRANSFORMERS_MODELS)
 from vllm.utils import is_pin_memory_available
 
 logger = init_logger(__name__)
@@ -261,6 +262,14 @@ def get_model_architecture(
             vllm_not_supported = False
             break
 
+    if any(arch in _PREVIOUSLY_SUPPORTED_MODELS for arch in architectures):
+        previous_version = _PREVIOUSLY_SUPPORTED_MODELS[architectures[0]]
+        raise ValueError(
+            f"Model architecture {architectures[0]} was supported"
+            f" in vLLM until version {previous_version}, and is "
+            "not supported anymore. Please use an older version"
+            " of vLLM if you want to use this model architecture.")
+
     if (model_config.model_impl == ModelImpl.TRANSFORMERS or
             model_config.model_impl == ModelImpl.AUTO and vllm_not_supported):
         architectures = resolve_transformers_arch(model_config, architectures)

vllm/model_executor/models/registry.py

@@ -279,6 +279,8 @@
     sys.executable, "-m", "vllm.model_executor.models.registry"
 ]
 
+_PREVIOUSLY_SUPPORTED_MODELS = {"Phi3SmallForCausalLM": "0.9.2"}
+
 
 @dataclass(frozen=True)
 class _ModelInfo: