verl-project/verl

[Bug][CI] FDSP2 test in `model_rmpad` job seems unstable

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#1,388 建立於 2025年5月4日

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描述

Motivation

https://github.com/volcengine/verl/actions/workflows/model.yml shows that:

  1. the FDSP2 test in model_rmpad workflow fails sometimes;
  2. but can also pass sometimes.

Plan

  • Find a setup that can reproduce the error steadily (possibly using the test container)
  • Locate the root cause
  • Fix the bug

Additional Info.

貢獻者指南

技術棧
pythondocker
領域
testingdevopsci cd
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
fresh
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
Pythonunderstanding of CI workflowstest debugging
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
35
研究方向
First, reproduce the flaky FDSP2 test in the model rmpad job locally using the test container as mentioned in the CI workflow. Inspect logs from successful and failed runs to identify differences. Look at the related PR (#1026) for context. Examine the test code for timing dependencies or race conditions. Check if the failure is environment specific (e.g., GPU or resource contention).
[Bug][CI] FDSP2 test in `model_rmpad` job seems unstable · verl-project/verl#1388 | Good First Issue