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[Bugfix] Use random hidden states in dummy sampler run #18543

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Merged
merged 1 commit into from
May 22, 2025
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[Bugfix] Use random hidden states in dummy sampler run #18543

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4 changes: 4 additions & 0 deletions vllm/v1/worker/gpu_model_runner.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1721,6 +1721,10 @@ def _dummy_sampler_run(
self,
hidden_states: torch.Tensor,
) -> torch.Tensor:
# The dummy hidden states may contain special values,
# like `inf` or `nan`.
# To avoid breaking the sampler, we use a random tensor here instead.
hidden_states = torch.rand_like(hidden_states)

logits = self.model.compute_logits(hidden_states, None)
num_reqs = logits.size(0)
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