[Frontend] Gracefully handle missing chat template and fix CI failure #7238
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…vllm-project#7238) Co-authored-by: Roger Wang <[email protected]> Signed-off-by: Alvant <[email protected]>
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…vllm-project#7238) Co-authored-by: Roger Wang <[email protected]> Signed-off-by: LeiWang1999 <[email protected]>
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This PR fixes the failing async engine test which contains invalid examples as of transformers v4.44 (see huggingface/transformers#31733).
This PR also improves the error handling when the tokenizer does not contain a chat template before calling
tokenizer.apply_chat_template, since the error raised inside HuggingFace isn't as relevant to the user.