René's URL Explorer Experiment


Title: gh-66587: Fix deadlock from pool worker death without communication by applio · Pull Request #16103 · python/cpython · GitHub

Open Graph Title: gh-66587: Fix deadlock from pool worker death without communication by applio · Pull Request #16103 · python/cpython

X Title: gh-66587: Fix deadlock from pool worker death without communication by applio · Pull Request #16103 · python/cpython

Description: Adds tracking of which worker process in the pool takes which job from the queue. When a worker process dies without communication, its task/job is also lost. By tracking what job that worker took off the job queue as its task, upon detecting the death, the parent process can add an item to the result queue indicating the failure of that task/job. In case of a future regression, the supplied test uses subprocess to constrain the test with a timeout to ensure an indefinite hang does not interfere with the running of tests. https://bugs.python.org/issue22393 Issue: gh-66587

Open Graph Description: Adds tracking of which worker process in the pool takes which job from the queue. When a worker process dies without communication, its task/job is also lost. By tracking what job that worker took...

X Description: Adds tracking of which worker process in the pool takes which job from the queue. When a worker process dies without communication, its task/job is also lost. By tracking what job that worker took...

Opengraph URL: https://github.com/python/cpython/pull/16103

X: @github

direct link

Domain: github.com

route-pattern/:user_id/:repository/pull/:id/files(.:format)
route-controllerpull_requests
route-actionfiles
fetch-noncev2:f497cff8-1be6-ecf6-eaac-465312c60f8d
current-catalog-service-hashae870bc5e265a340912cde392f23dad3671a0a881730ffdadd82f2f57d81641b
request-idB99E:DFEE2:354B81:47C784:6A514110
html-safe-noncecd2e50a2a2f204f6c5cd0ebd6bffbb93d5643e608093ec3053e50d90e3b8e917
visitor-payloadeyJyZWZlcnJlciI6IiIsInJlcXVlc3RfaWQiOiJCOTlFOkRGRUUyOjM1NEI4MTo0N0M3ODQ6NkE1MTQxMTAiLCJ2aXNpdG9yX2lkIjoiNzM3NjUxOTI1MjIwMTc4MzU2OCIsInJlZ2lvbl9lZGdlIjoiaWFkIiwicmVnaW9uX3JlbmRlciI6ImlhZCJ9
visitor-hmac373c844b0b80f0a0f8131b7f97a0a64cac485623afe1281294da1607658eab80
hovercard-subject-tagpull_request:317329962
github-keyboard-shortcutsrepository,pull-request-list,pull-request-conversation,pull-request-files-changed,copilot
google-site-verificationApib7-x98H0j5cPqHWwSMm6dNU4GmODRoqxLiDzdx9I
octolytics-urlhttps://collector.github.com/github/collect
analytics-location///pull_requests/show/files
fb:app_id1401488693436528
apple-itunes-appapp-id=1477376905, app-argument=https://github.com/python/cpython/pull/16103/files
twitter:imagehttps://avatars.githubusercontent.com/u/121634?s=400&v=4
twitter:cardsummary_large_image
og:imagehttps://avatars.githubusercontent.com/u/121634?s=400&v=4
og:image:altAdds tracking of which worker process in the pool takes which job from the queue. When a worker process dies without communication, its task/job is also lost. By tracking what job that worker took...
og:site_nameGitHub
og:typeobject
hostnamegithub.com
expected-hostnamegithub.com
Nonee840f405b2718e8f2d55aafa9ff27dbce17e29d0c253011d05ea0fea3c78baff
turbo-cache-controlno-preview
diff-viewunified
go-importgithub.com/python/cpython git https://github.com/python/cpython.git
octolytics-dimension-user_id1525981
octolytics-dimension-user_loginpython
octolytics-dimension-repository_id81598961
octolytics-dimension-repository_nwopython/cpython
octolytics-dimension-repository_publictrue
octolytics-dimension-repository_is_forkfalse
octolytics-dimension-repository_network_root_id81598961
octolytics-dimension-repository_network_root_nwopython/cpython
turbo-body-classeslogged-out env-production page-responsive full-width
disable-turbotrue
browser-stats-urlhttps://api.github.com/_private/browser/stats
browser-errors-urlhttps://api.github.com/_private/browser/errors
releasee876f00c5723f6080b9d294e4958fd4d506e6faf
ui-targetfull
theme-color#1e2327
color-schemelight dark

Links:

Skip to contenthttps://github.com/python/cpython/pull/16103/files#start-of-content
https://github.com/
Sign in https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fpython%2Fcpython%2Fpull%2F16103%2Ffiles
GitHub CopilotWrite better code with AIhttps://github.com/features/copilot
GitHub Copilot appDirect agents from issue to mergehttps://github.com/features/ai/github-app
MCP RegistryNewIntegrate external toolshttps://github.com/mcp
ActionsAutomate any workflowhttps://github.com/features/actions
CodespacesInstant dev environmentshttps://github.com/features/codespaces
IssuesPlan and track workhttps://github.com/features/issues
Code ReviewManage code changeshttps://github.com/features/code-review
GitHub Advanced SecurityFind and fix vulnerabilitieshttps://github.com/security/advanced-security
Code securitySecure your code as you buildhttps://github.com/security/advanced-security/code-security
Secret protectionStop leaks before they starthttps://github.com/security/advanced-security/secret-protection
Why GitHubhttps://github.com/why-github
Documentationhttps://docs.github.com
Bloghttps://github.blog
Changeloghttps://github.blog/changelog
Marketplacehttps://github.com/marketplace
View all featureshttps://github.com/features
Enterpriseshttps://github.com/enterprise
Small and medium teamshttps://github.com/team
Startupshttps://github.com/enterprise/startups
Nonprofitshttps://github.com/solutions/industry/nonprofits
App Modernizationhttps://github.com/solutions/use-case/app-modernization
DevSecOpshttps://github.com/solutions/use-case/devsecops
DevOpshttps://github.com/solutions/use-case/devops
CI/CDhttps://github.com/solutions/use-case/ci-cd
View all use caseshttps://github.com/solutions/use-case
Healthcarehttps://github.com/solutions/industry/healthcare
Financial serviceshttps://github.com/solutions/industry/financial-services
Manufacturinghttps://github.com/solutions/industry/manufacturing
Governmenthttps://github.com/solutions/industry/government
View all industrieshttps://github.com/solutions/industry
View all solutionshttps://github.com/solutions
AIhttps://github.com/resources/articles?topic=ai
Software Developmenthttps://github.com/resources/articles?topic=software-development
DevOpshttps://github.com/resources/articles?topic=devops
Securityhttps://github.com/resources/articles?topic=security
View all topicshttps://github.com/resources/articles
Customer storieshttps://github.com/customer-stories
Events & webinarshttps://github.com/resources/events
Ebooks & reportshttps://github.com/resources/whitepapers
Business insightshttps://github.com/solutions/executive-insights
GitHub Skillshttps://skills.github.com
Documentationhttps://docs.github.com
Customer supporthttps://support.github.com
Community forumhttps://github.com/orgs/community/discussions
Trust centerhttps://github.com/trust-center
Partnershttps://github.com/partners
View all resourceshttps://github.com/resources
GitHub SponsorsFund open source developershttps://github.com/open-source/sponsors
Security Labhttps://securitylab.github.com
Maintainer Communityhttps://maintainers.github.com
Acceleratorhttps://github.com/open-source/accelerator
GitHub Starshttps://stars.github.com
Archive Programhttps://archiveprogram.github.com
Topicshttps://github.com/topics
Trendinghttps://github.com/trending
Collectionshttps://github.com/collections
Enterprise platformAI-powered developer platformhttps://github.com/enterprise
GitHub Advanced SecurityEnterprise-grade security featureshttps://github.com/security/advanced-security
Copilot for BusinessEnterprise-grade AI featureshttps://github.com/features/copilot/copilot-business
Premium SupportEnterprise-grade 24/7 supporthttps://github.com/enterprise/premium-support
Pricinghttps://github.com/pricing
Search syntax tipshttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
documentationhttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
Sign in https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fpython%2Fcpython%2Fpull%2F16103%2Ffiles
Sign up https://github.com/signup?ref_cta=Sign+up&ref_loc=header+logged+out&ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E%2Fpull_requests%2Fshow%2Ffiles&source=header-repo&source_repo=python%2Fcpython
Reloadhttps://github.com/python/cpython/pull/16103/files
Reloadhttps://github.com/python/cpython/pull/16103/files
Reloadhttps://github.com/python/cpython/pull/16103/files
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
python https://github.com/python
cpythonhttps://github.com/python/cpython
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
Notifications https://github.com/login?return_to=%2Fpython%2Fcpython
Fork 35k https://github.com/login?return_to=%2Fpython%2Fcpython
Star 73.7k https://github.com/login?return_to=%2Fpython%2Fcpython
Code https://github.com/python/cpython
Issues 5k+ https://github.com/python/cpython/issues
Pull requests 2.3k https://github.com/python/cpython/pulls
Actions https://github.com/python/cpython/actions
Projects https://github.com/python/cpython/projects
Security and quality 0 https://github.com/python/cpython/security
Insights https://github.com/python/cpython/pulse
Code https://github.com/python/cpython
Issues https://github.com/python/cpython/issues
Pull requests https://github.com/python/cpython/pulls
Actions https://github.com/python/cpython/actions
Projects https://github.com/python/cpython/projects
Security and quality https://github.com/python/cpython/security
Insights https://github.com/python/cpython/pulse
Sign up for GitHub https://github.com/signup?return_to=%2Fpython%2Fcpython%2Fissues%2Fnew%2Fchoose
terms of servicehttps://docs.github.com/terms
privacy statementhttps://docs.github.com/privacy
Sign inhttps://github.com/login?return_to=%2Fpython%2Fcpython%2Fissues%2Fnew%2Fchoose
appliohttps://github.com/applio
python:mainhttps://github.com/python/cpython/tree/main
applio:fix_multiprocessing_worker_died_indefinite_hanghttps://github.com/applio/cpython/tree/fix_multiprocessing_worker_died_indefinite_hang
Conversation 32 https://github.com/python/cpython/pull/16103
Commits 7 https://github.com/python/cpython/pull/16103/commits
Checks 47 https://github.com/python/cpython/pull/16103/checks
Files changed https://github.com/python/cpython/pull/16103/files
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
gh-66587: Fix deadlock from pool worker death without communication https://github.com/python/cpython/pull/16103/files#top
Show all changes 7 commits https://github.com/python/cpython/pull/16103/files
c8f4896 Adds tracking of which process in the pool takes which job from the q… applio Sep 13, 2019 https://github.com/python/cpython/pull/16103/commits/c8f48966426a7979728370724dc868a176f88115
315ec3d Added blurb. applio Sep 13, 2019 https://github.com/python/cpython/pull/16103/commits/315ec3d9682bcb04b26d92a275a6fce90d553211
bcbd7d3 Fix for missing checks on resources still being available during tear… applio Sep 15, 2019 https://github.com/python/cpython/pull/16103/commits/bcbd7d3ebf596f197c127fea3e90469f803e968d
e1a9eb5 Remove spurious space. applio Sep 22, 2019 https://github.com/python/cpython/pull/16103/commits/e1a9eb5d43c79fe5b23017bd1c27516e3decca56
6459284 Fix result position for killed workers, add Steve suggested change to… applio Sep 23, 2019 https://github.com/python/cpython/pull/16103/commits/64592844258585099b517b2f3ef8caa73d8b4464
fa54afb Merge branch 'main' into fix_multiprocessing_worker_died_indefinite_hang gpshead May 22, 2025 https://github.com/python/cpython/pull/16103/commits/fa54afb2ab2ea213dcc3347accdc959d2fa5e110
5bc6db5 Merge branch 'main' into fix_multiprocessing_worker_died_indefinite_hang gpshead Jun 30, 2026 https://github.com/python/cpython/pull/16103/commits/5bc6db59e2ef3feb6102972ed665b3e13e7adacf
Clear filters https://github.com/python/cpython/pull/16103/files
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
pool.py https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
_test_multiprocessing.py https://github.com/python/cpython/pull/16103/files#diff-c3db62f7c1928499afd71830c22c8bb8f56843a4533cecf69137973d73c489fc
2019-09-13-10-39-28.bpo-22393.SZ3LeI.rst https://github.com/python/cpython/pull/16103/files#diff-43beda810ae160d9ca8331b9fa6b7e4df98c82f9a9300bc73ace89a228301410
https://github.com/python/cpython/blob/main/.github/CODEOWNERS#L531
Lib/multiprocessing/pool.pyhttps://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
View file https://github.com/applio/cpython/blob/5bc6db59e2ef3feb6102972ed665b3e13e7adacf/Lib/multiprocessing/pool.py
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/python/cpython/pull/16103/{{ revealButtonHref }}
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
pablogsalhttps://github.com/pablogsal
Jun 29, 2026https://github.com/python/cpython/pull/16103/files#r3490770718
Learn morehttps://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
gpsheadhttps://github.com/gpshead
Jun 30, 2026https://github.com/python/cpython/pull/16103/files#r3496767837
Learn morehttps://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
pablogsalhttps://github.com/pablogsal
Jun 29, 2026https://github.com/python/cpython/pull/16103/files#r3490770727
Learn morehttps://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
tomMoralhttps://github.com/tomMoral
Sep 20, 2019https://github.com/python/cpython/pull/16103/files#r326539774
Learn morehttps://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
https://github.com/python/cpython/pull/16103/files#diff-868ec74e6c7b13cb1ba8185bbdb6003a23671a5d2c7e1123de4ffb4250f6932b
https://github.com/python/cpython/blob/main/.github/CODEOWNERS#L532
Lib/test/_test_multiprocessing.pyhttps://github.com/python/cpython/pull/16103/files#diff-c3db62f7c1928499afd71830c22c8bb8f56843a4533cecf69137973d73c489fc
View file https://github.com/applio/cpython/blob/5bc6db59e2ef3feb6102972ed665b3e13e7adacf/Lib/test/_test_multiprocessing.py
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/python/cpython/pull/16103/{{ revealButtonHref }}
https://github.com/python/cpython/pull/16103/files#diff-c3db62f7c1928499afd71830c22c8bb8f56843a4533cecf69137973d73c489fc
taleinathttps://github.com/taleinat
Nov 17, 2019https://github.com/python/cpython/pull/16103/files#r347145898
Learn morehttps://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
taleinathttps://github.com/taleinat
Nov 17, 2019https://github.com/python/cpython/pull/16103/files#r347146064
Learn morehttps://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
taleinathttps://github.com/taleinat
Nov 17, 2019https://github.com/python/cpython/pull/16103/files#r347155349
Learn morehttps://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
https://github.com/python/cpython/pull/16103/files#diff-c3db62f7c1928499afd71830c22c8bb8f56843a4533cecf69137973d73c489fc
Misc/NEWS.d/next/Library/2019-09-13-10-39-28.bpo-22393.SZ3LeI.rsthttps://github.com/python/cpython/pull/16103/files#diff-43beda810ae160d9ca8331b9fa6b7e4df98c82f9a9300bc73ace89a228301410
View file https://github.com/applio/cpython/blob/5bc6db59e2ef3feb6102972ed665b3e13e7adacf/Misc/NEWS.d/next/Library/2019-09-13-10-39-28.bpo-22393.SZ3LeI.rst
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/python/cpython/pull/16103/{{ revealButtonHref }}
Please reload this pagehttps://github.com/python/cpython/pull/16103/files
https://github.com
Termshttps://docs.github.com/site-policy/github-terms/github-terms-of-service
Privacyhttps://docs.github.com/site-policy/privacy-policies/github-privacy-statement
Securityhttps://github.com/security
Statushttps://www.githubstatus.com/
Communityhttps://github.community/
Docshttps://docs.github.com/
Contacthttps://support.github.com?tags=dotcom-footer

Viewport: width=device-width

URLs of crawlers that visited me.