# تعطل بسبب V8 isolate تم إنشاؤه عند تخطي الوقت للأمام **URL:** https://meta.discourse.org/t/crash-due-to-v8-isolate-forked-when-time-skips-forward/213194 **Category:** Bug **Created:** [27 ديسمبر 2021، 3:59م UTC](https://meta.discourse.org/t/crash-due-to-v8-isolate-forked-when-time-skips-forward/213194 "2021-12-27T15:59:58Z") **Posts on this page:** 4 **Page:** 1
### Author: ![bennofs](https://avatars.discourse-cdn.com/v4/letter/b/82dd89/32.png) [@bennofs](https://meta.discourse.org/u/bennofs) #### Post date: [27 ديسمبر 2021، 3:59م UTC](https://meta.discourse.org/t/crash-due-to-v8-isolate-forked-when-time-skips-forward/213194/1 "2021-12-27T15:59:58Z")
لقد لاحظت مؤخرًا تعطلًا مثل ما يلي في تثبيت discourse الخاص بي: ```plaintext Dec 26 10:10:40 espresso bundle[367654]: D, [2021-12-26T10:10:40.517050 #367654] DEBUG -- : waiting 16.0s after suspend/hibernation Dec 26 10:10:40 espresso bundle[367654]: I, [2021-12-26T10:10:40.738229 #367654] INFO -- : reaped # worker=0 Dec 26 10:10:40 espresso bundle[367654]: I, [2021-12-26T10:10:40.738599 #367654] INFO -- : reaped # worker=1 Dec 26 10:10:40 espresso bundle[367654]: I, [2021-12-26T10:10:40.738839 #367654] INFO -- : reaped # worker=2 Dec 26 10:10:40 espresso bundle[367654]: I, [2021-12-26T10:10:40.738942 #367654] INFO -- : master complete Dec 26 10:10:41 espresso bundle[367653]: config/unicorn_launcher: line 71: kill: (367654) - No such process Dec 26 10:10:41 espresso bundle[367653]: config/unicorn_launcher: line 15: kill: (367654) - No such process Dec 26 10:10:41 espresso bundle[367653]: (367653) exiting Dec 26 10:10:50 espresso bundle[481559]: WARNING: V8 isolate was forked, it can not be disposed and memory will not be reclaimed till the Ruby process exits. Dec 26 10:10:50 espresso bundle[481559]: It is VERY likely your process will hang. Dec 26 10:10:50 espresso bundle[481559]: If you wish to use v8 in forked environment please ensure the platform is initialized with: Dec 26 10:10:50 espresso bundle[481559]: MiniRacer::Platform.set_flags! :single_threaded Dec 26 10:10:50 espresso bundle[481559]: # Dec 26 10:10:50 espresso bundle[481559]: # Fatal error in ../../src/base/platform/mutex.cc, line 51 Dec 26 10:10:50 espresso bundle[481559]: # Debug check failed: 0 == result (0 vs. 16). Dec 26 10:10:50 espresso bundle[481559]: # Dec 26 10:10:50 espresso bundle[481559]: # Dec 26 10:10:50 espresso bundle[481559]: # Dec 26 10:10:50 espresso bundle[481559]: #FailureMessage Object: 0x7f3e7a058470 Dec 26 10:10:50 espresso bundle[481559]: ==== C stack trace =============================== Dec 26 10:10:50 espresso bundle[481559]: /nix/store/59qyfxrrf2l6icyfvq450ghp86k4nssb-discourse-ruby-env-2.7.9/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/mini_racer-0.4.0/mini_racer_extension.so(v8::base::debug::StackTrace::StackTrace()+0x16) [0x7f3e7bd11ab6] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/59qyfxrrf2l6icyfvq450ghp86k4nssb-discourse-ruby-env-2.7.9/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/mini_racer-0.4.0/mini_racer_extension.so(+0x62c92c) [0x7f3e7ae0492c] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/59qyfxrrf2l6icyfvq450ghp86k4nssb-discourse-ruby-env-2.7.9/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/mini_racer-0.4.0/mini_racer_extension.so(V8_Fatal(char const*, int, char const*, ...)+0x173) [0x7f3e7bd089d3] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/59qyfxrrf2l6icyfvq450ghp86k4nssb-discourse-ruby-env-2.7.9/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/mini_racer-0.4.0/mini_racer_extension.so(+0x1530a05) [0x7f3e7bd08a05] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/59qyfxrrf2l6icyfvq450ghp86k4nssb-discourse-ruby-env-2.7.9/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/mini_racer-0.4.0/mini_racer_extension.so(v8::base::Mutex::~Mutex()+0x4c) [0x7f3e7bd0a30c] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/59qyfxrrf2l6icyfvq450ghp86k4nssb-discourse-ruby-env-2.7.9/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/mini_racer-0.4.0/mini_racer_extension.so(v8::platform::DelayedTaskQueue::~DelayedTaskQueue()+0x1b8) [0x7f3e7ae081d8] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/59qyfxrrf2l6icyfvq450ghp86k4nssb-discourse-ruby-env-2.7.9/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/mini_racer-0.4.0/mini_racer_extension.so(v8::platform::DefaultWorkerThreadsTaskRunner::~DefaultWorkerThreadsTaskRunner()+0xa7) [0x7f3e7ae07797] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/59qyfxrrf2l6icyfvq450ghp86k4nssb-discourse-ruby-env-2.7.9/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/mini_racer-0.4.0/mini_racer_extension.so(v8::platform::DefaultPlatform::~DefaultPlatform()+0x1ce) [0x7f3e7ae0527e] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/59qyfxrrf2l6icyfvq450ghp86k4nssb-discourse-ruby-env-2.7.9/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/mini_racer-0.4.0/mini_racer_extension.so(v8::platform::DefaultPlatform::~DefaultPlatform()+0x12) [0x7f3e7ae05332] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/z56jcx3j1gfyk4sv7g8iaan0ssbdkhz1-glibc-2.33-56/lib/libc.so.6(+0x3de57) [0x7f3e8e1e9e57] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/z56jcx3j1gfyk4sv7g8iaan0ssbdkhz1-glibc-2.33-56/lib/libc.so.6(+0x3e00a) [0x7f3e8e1ea00a] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/22hgrp938c7sfj1s4klhigddix2sqc12-ruby-2.7.4/lib/libruby-2.7.4.so.2.7(ruby_run_node+0) [0x7f3e8e5ecea0] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/22hgrp938c7sfj1s4klhigddix2sqc12-ruby-2.7.4/lib/libruby-2.7.4.so.2.7(+0x1567a8) [0x7f3e8e6917a8] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/22hgrp938c7sfj1s4klhigddix2sqc12-ruby-2.7.4/lib/libruby-2.7.4.so.2.7(+0x1f39c2) [0x7f3e8e72e9c2] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/22hgrp938c7sfj1s4klhigddix2sqc12-ruby-2.7.4/lib/libruby-2.7.4.so.2.7(+0x200073) [0x7f3e8e73b073] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/22hgrp938c7sfj1s4klhigddix2sqc12-ruby-2.7.4/lib/libruby-2.7.4.so.2.7(rb_vm_exec+0x9c) [0x7f3e8e73eb2c] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/22hgrp938c7sfj1s4klhigddix2sqc12-ruby-2.7.4/lib/libruby-2.7.4.so.2.7(+0x1c7a54) [0x7f3e8e702a54] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/22hgrp938c7sfj1s4klhigddix2sqc12-ruby-2.7.4/lib/libruby-2.7.4.so.2.7(+0x1c9f61) [0x7f3e8e704f61] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/22hgrp938c7sfj1s4klhigddix2sqc12-ruby-2.7.4/lib/libruby-2.7.4.so.2.7(+0x1ca50a) [0x7f3e8e70550a] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/z56jcx3j1gfyk4sv7g8iaan0ssbdkhz1-glibc-2.33-56/lib/libpthread.so.0(+0x8d3e) [0x7f3e8e506d3e] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/z56jcx3j1gfyk4sv7g8iaan0ssbdkhz1-glibc-2.33-56/lib/libc.so.6(clone+0x3f) [0x7f3e8e2a643f] Dec 26 10:10:50 espresso bundle[481559]: /nix/store/hcy90qhhi1cp82b6935wdacq2dlskpk0-ruby2.7.4-activesupport-6.1.3.2/lib/ruby/gems/2.7.0/gems/activesupport-6.1.3.2/lib/active_support/fork_tracker.rb:8: [BUG] Illegal instruction at 0x00007f3e7adf8ebf Dec 26 10:10:50 espresso bundle[481559]: ruby 2.7.4p191 (2021-07-07) [x86_64-linux] Dec 26 10:10:50 espresso bundle[481559]: -- Machine register context ------------------------------------------------ Dec 26 10:10:50 espresso bundle[481559]: RIP: 0x00007f3e7adf8ebf RBP: 0x00007f3e7a058770 RSP: 0x00007f3e7a058448 Dec 26 10:10:50 espresso bundle[481559]: RAX: 0x0000000000000000 RBX: 0x00007f3e7a058470 RCX: 0x0000000000000001 Dec 26 10:10:50 espresso bundle[481559]: RDX: 0x0000000000000001 RDI: 0x00007f3e8e368310 RSI: 0x0000000000000000 Dec 26 10:10:50 espresso bundle[481559]: R8: 0x0000000000000000 R9: 0x00007f3e7450b77a R10: 0x0000000000000006 Dec 26 10:10:50 espresso bundle[481559]: R11: 0x0000000000000293 R12: 0x00007f3e7c523f0a R13: 0x00007f3e7c523fa8 Dec 26 10:10:50 espresso bundle[481559]: R14: 0x0000000000000033 R15: 0x00007f3e7a058458 EFL: 0x0000000000010202 ``` نظريتي حول سبب حدوث ذلك هي كالتالي: - رأيت أن الجهاز توقف لبعض الوقت مباشرة قبل هذا الحدث. لذلك، من المحتمل حدوث قفزة في الوقت. وهذا يفسر أيضًا رسالة `waiting 16.0s after suspend` من unicorn. - بتحليل سجلات discourse، وجدت سجلات من ناقل رسائل discourse تفيد بأن الرسائل العامة انتهت مهلتها. لذلك تم تشغيل هذا الكود هنا: [message\_bus/lib/message\_bus.rb at f85036bc437985b34c54d894cfde7fa008130733 · discourse/message\_bus · GitHub](https://github.com/discourse/message_bus/blob/f85036bc437985b34c54d894cfde7fa008130733/lib/message_bus.rb#L749). أدى هذا إلى تفرع عملية unicorn الرئيسية. - يقوم هذا الكود بعمل تفرع مباشر، والذي من المحتمل ألا يقوم بتشغيل معالجات unicorn قبل التفرع لتنظيف عزلات V8 من سياقات mini\_racer. ---
### Author: ![sam](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/sam/32/102149_2.png) [@sam](https://meta.discourse.org/u/sam) #### Post date: [29 ديسمبر 2021، 11:01م UTC](https://meta.discourse.org/t/crash-due-to-v8-isolate-forked-when-time-skips-forward/213194/4 "2021-12-29T23:01:27Z")
نحن نناقش هذا داخليًا، لكن شعوري هنا هو أن الوقت قد حان لإيقاف هذا الكود “الانتحاري” من message\_bus. على المدى الطويل، فإنه يسبب مشاكل فقط. ---
### Author: ![david](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/david/32/157490_2.png) [@david](https://meta.discourse.org/u/david) #### Post date: [4 يناير 2022، 10:46ص UTC](https://meta.discourse.org/t/crash-due-to-v8-isolate-forked-when-time-skips-forward/213194/5 "2022-01-04T10:46:41Z")
تم إصلاح هذا في > > > Previously if message bus stalled for 3 \* keepalive (default 60 seconds) > it woul…d terminate itself. > > This causes pathological issues when a bus is in readonly mode and is a > very unsafe default. > > The reasoning for the keepalive check was to ensure the bus it always > functioning, the remediation was deescalated to a log warning. وتم دمجه في Discourse في > > > Bumps \[message\_bus\](https://github.com/discourse/message\_bus) from 3.3.8 to 3.4.…0. > \- \[Release notes\](https://github.com/discourse/message\_bus/releases) > \- \[Changelog\](https://github.com/discourse/message\_bus/blob/main/CHANGELOG) > \- \[Commits\](https://github.com/discourse/message\_bus/compare/v3.3.8...v3.4.0) > > \--- > updated-dependencies: > \- dependency-name: message\_bus > dependency-type: direct:production > update-type: version-update:semver-minor > ... > > Signed-off-by: dependabot\[bot\] \ > > Co-authored-by: dependabot\[bot\] \<49699333+dependabot\[bot\]@users.noreply.github.com\> شكرًا على التقرير المفصل @bennofs! ---
### Author: ![david](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/david/32/157490_2.png) [@david](https://meta.discourse.org/u/david) #### Post date: [8 يناير 2022، 8:00ص UTC](https://meta.discourse.org/t/crash-due-to-v8-isolate-forked-when-time-skips-forward/213194/6 "2022-01-08T08:00:31Z")
تم إغلاق هذا الموضوع تلقائيًا بعد 3 أيام. لم يعد يُسمح بالردود الجديدة.