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vllm - 💡(How to fix) Fix [CI Failure]: mi250_1: LoRA %N [2 comments, 1 participants]

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vllm-project/vllm#41578•Fetched 2026-05-04 04:58:45
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Author
AndreasKaratzasAndreasKaratzas
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AndreasKaratzasAndreasKaratzas
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Root Cause

  • Flaky test
  • Can reproduce locally
  • Caused by external libraries (e.g. bug in transformers)

Code Example

FAILED lora/test_transformers_model.py::test_ilama_lora
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Name of failing test

(command rocm-smi || true) && export VLLM_TEST_GROUP_NAME=mi250_1-lora-n && export VLLM_ALLOW_DEPRECATED_BEAM_SEARCH=1 && cd /vllm-workspace/tests && pytest -v -s lora --shard-id=$BUILDKITE_PARALLEL_JOB --num-shards=$BUILDKITE_PARALLEL_JOB_COUNT --ignore=lora/test_chatglm3_tp.py --ignore=lora/test_llama_tp.py --ignore=lora/test_llm_with_multi_loras.py --ignore=lora/test_olmoe_tp.py --ignore=lora/test_deepseekv2_tp.py --ignore=lora/test_gptoss_tp.py --ignore=lora/test_qwen3moe_tp.py --ignore=lora/test_qwen35_densemodel_lora.py

Basic information

  • Flaky test
  • Can reproduce locally
  • Caused by external libraries (e.g. bug in transformers)

🧪 Describe the failing test

FAILED lora/test_transformers_model.py::test_ilama_lora

📝 History of failing test

  • Current streak start: 2026-04-16
  • First failure in 60d window: 2026-04-16
  • Last successful nightly: 2026-04-15
  • Break frequency (60d, pass↔fail flips): 1
  • Latest nightly date: 2026-05-03
  • Latest build(s): amd-ci #8177
  • Latest hardware status: mi250_1=fail

extent analysis

TL;DR

Investigate the test_ilama_lora test in lora/test_transformers_model.py to identify the cause of the failure.

Guidance

  • Review the test code and recent changes to lora/test_transformers_model.py to determine if any modifications could be causing the test to fail.
  • Check the test environment and dependencies, such as the transformers library, to ensure they are up-to-date and compatible.
  • Run the test in isolation using pytest -v -s lora/test_transformers_model.py::test_ilama_lora to gather more information about the failure.
  • Investigate the hardware status and build logs for [amd-ci #8177](https://buildkite.com/vllm/amd-ci/builds/8177) to see if there are any related issues.

Notes

The issue seems to be related to a specific test and hardware configuration, so the solution may depend on the specifics of the test and environment.

Recommendation

Apply workaround: Investigate and debug the test_ilama_lora test to identify the root cause of the failure, as it is not clear if this is an issue with the test itself or the environment.

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#tensor shape#autograd error#model save/load#optimization#mixed precision

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