apache/kyuubi

[TEST] Invest root cause for Flink flaky test - select count

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#3,583 创建于 2022年9月30日

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 (0 评论) (0 反应) (0 负责人)Scala (2,332 star) (996 fork)batch import
help wantedkind:testpriority:minor

描述

Code of Conduct

Search before asking

  • I have searched in the issues and found no similar issues.

What kind of test improve?

  • Fix flaky tests.
  • Fix bug in tests.
  • Increase test coverage.
  • Other kinds of test improve.

Describe the issues of the existing tests or improvements for new tests

In https://github.com/apache/incubator-kyuubi/pull/3521, we temporary change the assertion but do not find the root cause, it would be nice if some Flinker expert could do investigations to explain what happens under the hood.

Are you willing to submit PR?

  • Yes. I can submit a PR independently to improve.
  • Yes. I would be willing to submit a PR with guidance from the Kyuubi community to improve.
  • No. I cannot submit a PR at this time.

贡献者指南

技术栈
javasql
领域
testing
议题类型
test
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
4
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
3-5 days
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
fresh
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
Understanding of Flink SQLFamiliarity with Kyuubi's Flink integration
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
25
研究方向
Investigate the flaky test related to 'select count' in the Flink integration. Review the changes made in PR #3521 which temporarily adjusted the assertion. Examine the Flink execution plan to understand possible race conditions or timing issues. Reproduce the flakiness and identify the root cause in the test or underlying code.