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fix(vllm): warn that stream interval is not respected for now #4650

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fix(vllm): warn that stream interval is not respected for now #4650

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b6bdbf1
vllm - warn that stream interval is not respected for now
alec-flowers Nov 26, 2025
6c9e135
fix random pre-commit error that popped up
alec-flowers Nov 26, 2025
ae0a768
Merge branch 'main' into aflowers/stream-warning-vllm
alec-flowers Nov 26, 2025
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7 changes: 7 additions & 0 deletions components/src/dynamo/vllm/args.py
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Original file line number Diff line number Diff line change
Expand Up @@ -198,6 +198,13 @@ def parse_args() -> Config:
args = parser.parse_args()
engine_args = AsyncEngineArgs.from_cli_args(args)

if hasattr(engine_args, "stream_interval") and engine_args.stream_interval != 1:
logger.warning(
"--stream-interval is currently not respected in Dynamo. "
"Dynamo uses its own post-processing implementation on the frontend, "
"bypassing vLLM's OutputProcessor buffering. "
)

if engine_args.enable_prefix_caching is None:
logger.debug(
"--enable-prefix-caching or --no-enable-prefix-caching not specified. Defaulting to True (vLLM v1 default behavior)"
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