python / python/cpython

multiprocessing Queue leaks a file descriptor associated with the pipe writer (#33081 still a problem)

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3.10 3.7 (EOL) 3.8 (EOL) 3.9 (EOL) stdlib topic-multiprocessing type-bug
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描述

BPO 42752
Nosy @pitrou, @mattip, @graingert, @applio
Files
  • test_queue.py
  • queue_close_write.patch
  • Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
    closed_at = None
    created_at = <Date 2020-12-26.23:03:41.032>
    labels = ['3.8', '3.9', '3.10', 'performance', '3.7', 'library']
    title = 'multiprocessing Queue leaks a file descriptor associated with the pipe writer (#33081 still a problem)'
    updated_at = <Date 2022-02-21.11:50:18.407>
    user = 'https://bugs.python.org/crazycasta'
    

    bugs.python.org fields:

    activity = <Date 2022-02-21.11:50:18.407>
    actor = 'vstinner'
    assignee = 'none'
    closed = False
    closed_date = None
    closer = None
    components = ['Library (Lib)']
    creation = <Date 2020-12-26.23:03:41.032>
    creator = 'crazycasta'
    dependencies = []
    files = ['49701', '49713']
    hgrepos = []
    issue_num = 42752
    keywords = ['patch']
    message_count = 5.0
    messages = ['383832', '384149', '384151', '384737', '388632']
    nosy_count = 5.0
    nosy_names = ['pitrou', 'mattip', 'graingert', 'crazycasta', 'davin']
    pr_nums = []
    priority = 'normal'
    resolution = None
    stage = None
    status = 'open'
    superseder = None
    type = 'resource usage'
    url = 'https://bugs.python.org/issue42752'
    versions = ['Python 3.6', 'Python 3.7', 'Python 3.8', 'Python 3.9', 'Python 3.10']
    

    Linked PRs
    • gh-112900

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    3. Fork 仓库,在一个分支上完成修改。
    4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

    调研方向

    先从上传的 test_queue.py 和 queue_close_write.patch 开始,然后检查与文件描述符清理相关的 multiprocessing Queue 管道写入器行为。运行提供的 Queue 测试,并将现有行为与链接的 PR gh-112900 进行比较。当 reproducer 不再显示泄漏的管道写入器描述符,并且相关测试通过时,即视为完成。

    由索引模型根据 Issue 内容生成。

    评估

    技术栈
    python
    领域
    operating-systems
    Issue 类型
    缺陷
    难度
    4/5
    预计耗时
    3-5 天
    活跃度
    停滞
    描述清晰度
    基本清楚
    新手友好度
    25/100

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