Hello DAN, or anyone else affected, Accepted ruby2.3 into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ruby2.3/2.3.1-2~ubuntu16.04.13 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-xenial to verification-done-xenial. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-xenial. In either case, details of your testing will help us make a better decision. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance! ** Changed in: ruby2.3 (Ubuntu Xenial) Status: New => Fix Committed ** Tags added: verification-needed verification-needed-xenial ** Changed in: ruby2.3 (Ubuntu) Status: In Progress => Invalid -- You received this bug notification because you are a member of नेपाली भाषा समायोजकहरुको समूह, which is subscribed to Xenial. Matching subscriptions: Ubuntu 16.04 Bugs https://bugs.launchpad.net/bugs/1834072 Title: Puppet agent using 100% CPU, in sched_yield() loop. Looks like an issue with ruby2.3 which has been fixed but not yet made it into Ubuntu. Status in ruby2.3 package in Ubuntu: Invalid Status in ruby2.3 source package in Xenial: Fix Committed Status in ruby2.3 package in Debian: Fix Released Bug description: [Impact] Ruby processes can sometimes get stuck in a loop consuming 100% CPU, as described upstream and in the debian bug report. It has most commonly been seen in the puppet agent. [Test Case] It's not easy to reproduce. It has been suggested that this script eventually reproduces the problem: while nice -n19 /opt/puppetlabs/puppet/bin/ruby sched_yield_loop.rb; do :; done Where sched_yield_loop.rb comes from "https://bugs.debian.org/cgi- bin/bugreport.cgi?att=1;bug=876377;filename=sched_yield_loop.rb;msg=22" I personally haven't seen it happen with the script, but maybe it could take days. [Regression Potential] Races with threads can be hard to reproduce, and so can regressions. Patch has been applied upstream and to debian for more than a year now. [Other Info] Bionic has ruby 2.5.1 and it has this fix already, as do all later ubuntu releaes. [Original Description] Ubuntu 16.04 ruby 2.3.1-2~16.04.12 kernel 4.4.0-148-generic We've noticed an issue across multiple servers where puppet agent will seem to get stuck and consume 100% CPU for days or weeks on end until manually killed. root@ps-prod-jenkins-qa-ui02:~# ps auxwwww|grep -i puppe[t] root 1412 0.0 0.2 143716 38680 ? Ssl Jun11 0:39 /usr/bin/ruby /usr/bin/puppet agent root 34884 74.4 0.3 286848 53724 ? Rs Jun23 1141:44 puppet agent: applying configuration root 111481 94.1 0.3 288572 54996 ? Rs Jun18 8642:32 puppet agent: applying configuration root 128479 54.8 0.3 286744 53596 ? Rs 10:30 250:17 puppet agent: applying configuration Strace shows it in a sched_yield() loop: root@ps-prod-jenkins-qa-ui02:~# strace -p 34884 -c strace: Process 34884 attached ^Cstrace: Process 34884 detached % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 100.00 0.002130 0 123189 sched_yield ------ ----------- ----------- --------- --------- ---------------- 100.00 0.002130 123189 total Some googling shows this is a common issue which was supposedly fixed/backported to ruby 2.3: https://tickets.puppetlabs.com/browse/PA-1743 https://bugs.ruby-lang.org/issues/13794 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=876377 The following open Ubuntu bugs look to be having the same issue and suggest that this fix made it into Debian but never made it into Ubuntu: https://bugs.launchpad.net/ubuntu/+source/pcs/+bug/1783161 https://bugs.launchpad.net/ubuntu/+source/pcs/+bug/1772998 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ruby2.3/+bug/1834072/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : [email protected] Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp
