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[Bugfix]: Fix the incompatibility issue with Structured Outputs when Thinking is disabled (#18879)

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Signed-off-by: chaunceyjiang <chaunceyjiang@gmail.com>
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Chauncey 2025-05-31 17:20:54 +08:00 committed by GitHub
parent 1e123529d7
commit ba5111f237
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2 changed files with 19 additions and 13 deletions
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30
vllm/v1/structured_output/__init__.py
View File

@ -149,31 +149,37 @@ class StructuredOutputManager:
# NOTE: This outer loop can likely be parallelized to improve
# performance of bitmask generation for large batches.
for req_id, _ in ordered_seq:
request = requests[req_id].structured_output_request
if TYPE_CHECKING:
assert request is not None
assert request.grammar is not None
request = requests[req_id]
structured_output_request = request.structured_output_request
apply_bitmask = (
request.reasoning_ended if self.reasoner is not None else True
) # noqa: E501
if TYPE_CHECKING:
assert structured_output_request is not None
assert structured_output_request.grammar is not None
apply_bitmask: bool = True
if self.reasoner is not None:
if structured_output_request.reasoning_ended is None:
structured_output_request.reasoning_ended = \
self.reasoner.is_reasoning_end(request.prompt_token_ids)
apply_bitmask = structured_output_request.reasoning_ended
state_advancements = 0
req_tokens = scheduled_spec_decode_tokens.get(req_id, []) + [None]
for i, token in enumerate(req_tokens):
if apply_bitmask and not request.grammar.is_terminated():
request.grammar.fill_bitmask(bitmask_tensor,
cumulative_index)
if apply_bitmask and not \
structured_output_request.grammar.is_terminated():
structured_output_request.grammar.fill_bitmask(
bitmask_tensor, cumulative_index)
if token is not None:
# In order to generate the correct bitmask for each
# position in the speculative sequence, we advance
# the FSM state for each speculative token and rollback
# to restore the previous state when we are finished.
assert request.grammar.accept_tokens(req_id, [token])
assert structured_output_request.grammar.accept_tokens(
req_id, [token])
state_advancements += 1
cumulative_index += 1
if state_advancements > 0:
request.grammar.rollback(state_advancements)
structured_output_request.grammar.rollback(state_advancements)
if cumulative_index < bitmask_tensor.shape[0]:
bitmask_tensor = bitmask_tensor[:cumulative_index]

2
vllm/v1/structured_output/request.py
View File

@ -20,7 +20,7 @@ class StructuredOutputRequest:
sampling_params: SamplingParams
_grammar: Optional[Union[Future[StructuredOutputGrammar],
StructuredOutputGrammar]] = None
reasoning_ended: bool = False
reasoning_ended: Optional[bool] = None
def _check_grammar_completion(self) -> bool:
# NOTE: We have to lazy import to gate circular imports