[Doc]: Why NGramWorker does not support cache operations

[kuangdao]

📚 The doc issue

i want to know Why NGramWorker does not support cache operations. this code https://github.com/vllm-project/vllm/blob/main/vllm/spec_decode/ngram_worker.py#L155 . this pr (#8824) seems can support cache operations when run in NGramWorker .

Suggest a potential alternative/fix

No response

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[zboya]

I have the same problem.

[github-actions]

This issue has been automatically marked as stale because it has not had any activity within 90 days. It will be automatically closed if no further activity occurs within 30 days. Leave a comment if you feel this issue should remain open. Thank you!

[github-actions]

This issue has been automatically closed due to inactivity. Please feel free to reopen if you feel it is still relevant. Thank you!