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Fix Eagle3 with Transformers modelling backend #36120

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Merged
DarkLight1337 merged 2 commits into from
Mar 5, 2026
Merged

Fix Eagle3 with Transformers modelling backend #36120

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3be6e57
Fix import that was moved in Transformers 5.2.0
hmellor Mar 5, 2026
a23e807
Make sure the capture hooks
hmellor Mar 5, 2026
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10 changes: 8 additions & 2 deletions vllm/model_executor/models/transformers/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -516,8 +516,11 @@ def check_version(min_version: str, feature: str):
)

def set_aux_hidden_state_layers(self, layers: tuple[int, ...]) -> None:
self.check_version("5.0.0", "Eagle3 support")
from transformers.utils.generic import OutputRecorder
self.check_version("5.2.0", "Eagle3 support")
from transformers.utils.output_capturing import (
OutputRecorder,
maybe_install_capturing_hooks,
)

# The default value in PreTrainedModel is None
if self.model._can_record_outputs is None:
Expand All @@ -532,6 +535,9 @@ def set_aux_hidden_state_layers(self, layers: tuple[int, ...]) -> None:
self.model._can_record_outputs[layer_key] = aux_hidden_state_i
self._output_aux_hidden_states_kwargs[f"output_{layer_key}"] = True

# Ensure that the capture hooks are installed before dynamo traces the model
maybe_install_capturing_hooks(self.model)

def get_eagle3_aux_hidden_state_layers(self) -> tuple[int, ...]:
num_layers = self.text_config.num_hidden_layers
return (2, num_layers // 2, num_layers - 3)