gem runs endless loop

[Hadmut Danisch]

Hi,

a simple gem command just jumped into a an endless loop with 100% CPU usage (while installing ri):

% sudo gem install sinatra
[sudo] Passwort für danisch:
Fetching: sinatra-1.4.8.gem (100%)
Successfully installed sinatra-1.4.8
Parsing documentation for sinatra-1.4.8
Installing ri documentation for sinatra-1.4.8

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ruby 1:2.3.0+4
ProcVersionSignature: Ubuntu 4.8.0-34.36-generic 4.8.11
Uname: Linux 4.8.0-34-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
CurrentDesktop: XFCE
Date: Mon Feb 6 17:08:58 2017
InstallationDate: Installed on 2016-04-22 (290 days ago)
InstallationMedia: Lubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420)
SourcePackage: ruby-defaults
UpgradeStatus: Upgraded to yakkety on 2016-10-17 (112 days ago)

[Hadmut Danisch (hadmut)]

gem install --no-ri works..

[Joshua Powers (powersj)]

How long did you let it run for? Is this a small system? I tried this in a container and found that it did indeed cause my CPU to run up to 100% for a minute or so, but then completed:

Parsing documentation for sinatra-1.4.8
Installing ri documentation for sinatra-1.4.8
Done installing documentation for rack, tilt, rack-protection, sinatra after 28 seconds
4 gems installed

It appears that parsing the documentation causes significant CPU usage. I am going to mark this as incomplete rather than confirmed since I was able to complete the install.

[Joshua Powers (powersj)]

Well obviously it wasn't a minute, since it says "after 28 seconds", but you get the idea :) It sat for a bit.

[Hadmut Danisch (hadmut)]

> How long did you let it run for?

Precisely as long as it took me to go to the kitchen and prepare some meal for dinner. Didn't check the time.

System is a Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz

[Joshua Powers (powersj)]

Rather than using the version via gem, have you considered using the version in Ubuntu via 'apt install ruby-sinatra' and see if that gets around your issue when using gem?

Given the is the bug tracker for Ubuntu we are not the best source of help to resolve an issue via gem, pip, etc.

[Hadmut Danisch (hadmut)]

Yeah, but the Ubuntu-Version was not running with other gems correctly, is outdated. That's why I had to throw it away and use the gem version.

[Launchpad Janitor (janitor)]

[Expired for ruby-defaults (Ubuntu) because there has been no activity for 60 days.]