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[Bugfix] Fix failing transformers dynamic module resolving with spawn multiproc method (#13403)

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Signed-off-by: Isotr0py <2037008807@qq.com>
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Isotr0py 2025-02-18 18:25:53 +08:00 committed by GitHub
parent e2603fefb8
commit 8cf97f8661
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1 changed files with 17 additions and 8 deletions
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25
vllm/model_executor/model_loader/utils.py
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@ -47,22 +47,31 @@ def resolve_transformers_fallback(model_config: ModelConfig,
for i, arch in enumerate(architectures): for i, arch in enumerate(architectures):
if arch == "TransformersModel": if arch == "TransformersModel":
continue continue
custom_module = None auto_map: dict[str, str] = getattr(model_config.hf_config, "auto_map",
auto_map = getattr(model_config.hf_config, "auto_map", None) None) or dict()
if auto_map is not None and "AutoModel" in auto_map: # Make sure that config class is always initialized before model class,
custom_module = get_class_from_dynamic_module( # otherwise the model class won't be able to access the config class,
model_config.hf_config.auto_map["AutoModel"], # the expected auto_map should have correct order like:
model_config.model) # "auto_map": {
# "AutoConfig": "<your-repo-name>--<config-name>",
# "AutoModel": "<your-repo-name>--<config-name>",
# "AutoModelFor<Task>": "<your-repo-name>--<config-name>",
# },
auto_modules = {
name: get_class_from_dynamic_module(module, model_config.model)
for name, module in sorted(auto_map.items(), key=lambda x: x[0])
}
custom_model_module = auto_modules.get("AutoModel")
# TODO(Isotr0py): Further clean up these raises. # TODO(Isotr0py): Further clean up these raises.
# perhaps handled them in _ModelRegistry._raise_for_unsupported? # perhaps handled them in _ModelRegistry._raise_for_unsupported?
if model_config.model_impl == ModelImpl.TRANSFORMERS: if model_config.model_impl == ModelImpl.TRANSFORMERS:
if not is_transformers_impl_compatible(arch, custom_module): if not is_transformers_impl_compatible(arch, custom_model_module):
raise ValueError( raise ValueError(
f"The Transformers implementation of {arch} is not " f"The Transformers implementation of {arch} is not "
"compatible with vLLM.") "compatible with vLLM.")
architectures[i] = "TransformersModel" architectures[i] = "TransformersModel"
if model_config.model_impl == ModelImpl.AUTO: if model_config.model_impl == ModelImpl.AUTO:
if not is_transformers_impl_compatible(arch, custom_module): if not is_transformers_impl_compatible(arch, custom_model_module):
raise ValueError( raise ValueError(
f"{arch} has no vLLM implementation and the Transformers " f"{arch} has no vLLM implementation and the Transformers "
"implementation is not compatible with vLLM.") "implementation is not compatible with vLLM.")