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Bug #8374

closed

race condition when two threads require a gem

Added by vjoel (Joel VanderWerf) almost 11 years ago. Updated over 10 years ago.

Status:
Closed
Target version:
-
ruby -v:
ruby 2.0.0p0 (2013-02-24) [i686-linux]
[ruby-core:54842]

Description

=begin
Requiring a gem with a C extension seems to be not threadsafe.

Any one of the require lines below will frequently (but not always) cause an error like the following:

/usr/local/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in require': cannot load such file -- sqlite3 (LoadError) from /usr/local/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in require'
from thread.rb:7:in `block (2 levels) in '

Using one thread avoids the problem.

ths = (1..2).map do
Thread.new do

require 'msgpack'

require 'yajl'

require 'sequel'

require 'nio4r'

  require 'sqlite3'
end

end

ths.each {|th| th.join}
=end

Updated by nobu (Nobuyoshi Nakada) almost 11 years ago

  • Description updated (diff)
  • Category set to lib
  • Status changed from Open to Assigned
  • Assignee set to drbrain (Eric Hodel)

Seems rubygems specific.

Updated by drbrain (Eric Hodel) over 10 years ago

  • Subject changed from race condition when two threads require a gem with a C extension to race condition when two threads require a gem

This is reproducible without a C extension, updated subject.

Updated by drbrain (Eric Hodel) over 10 years ago

  • Status changed from Assigned to Closed

This has been fixed in rubygems master and 2.0 branches.

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