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Do not send an empty 'tools' param to remote vllm

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Fixes: #1955

Since 0.2.0, the vLLM gets an empty list (vs ``None`` in 0.1.9 and
before) when there are no tools configured which causes the issue described
in #1955. This patch avoids sending the 'tools' param to the vLLM altogether
instead of an empty list.

It also adds a small unit test to avoid regressions.

Signed-off-by: Daniel Alvarez <dalvarez@redhat.com>
This commit is contained in:
Daniel Alvarez 2025-04-15 16:06:51 +02:00
parent 83b5523e2d
commit 538d601472
2 changed files with 19 additions and 2 deletions
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3
llama_stack/providers/remote/inference/vllm/vllm.py
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@ -374,7 +374,8 @@ class VLLMInferenceAdapter(Inference, ModelsProtocolPrivate):
options["max_tokens"] = self.config.max_tokens
input_dict: dict[str, Any] = {}
if isinstance(request, ChatCompletionRequest) and request.tools is not None:
# Only include the 'tools' param if there is any. It can break things if an empty list is sent to the vLLM.
if isinstance(request, ChatCompletionRequest) and request.tools:
input_dict = {"tools": _convert_to_vllm_tools_in_request(request.tools)}
if isinstance(request, ChatCompletionRequest):