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docs: add release notes for vLLM race condition fix (PR #1590) #1696

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lbliii merged 1 commit into from
Apr 1, 2026
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docs: add release notes for vLLM race condition fix (PR #1590) #1696

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4 changes: 4 additions & 0 deletions fern/versions/v26.04/pages/about/release-notes/index.mdx
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Expand Up @@ -31,6 +31,10 @@ Upgraded Cosmos-Xenna from 0.1.2 to 0.2.0 with a simplified resource model and i

Fixed audio pipeline stage names not propagating in `StagePerfStats`, making benchmark output unable to identify per-stage timing. All audio stages (`GetAudioDurationStage`, `PreserveByValueStage`, `AudioToDocumentStage`, `GetPairwiseWerStage`) now correctly report their names, and stage performance history persists when stages create new task objects.

### Video vLLM Setup Race Condition (PR #1590)

Fixed a race condition in `CaptionGenerationStage` and `CaptionEnhancementStage` where multiple workers simultaneously initializing vLLM would race on the shared `torch.compile` cache directory, causing `FileNotFoundError`. Model initialization now runs once per node in `setup_on_node()` instead of per-worker in `setup()`, matching the pattern used by text vLLM stages.

## Breaking Changes

- **`Resources` API**: The `nvdecs`, `nvencs`, and `entire_gpu` fields have been removed from `Resources`. Stages that previously used `entire_gpu=True` should use `gpus=1` instead. Stages that used `nvdecs` or `nvencs` should use `gpus` for GPU allocation.
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