From: Tanaka Akira <akr@...>
Date: 2008-01-06T19:22:19+09:00
Subject: [ruby-dev:32935] queue and timeout

timeout で Queue#pop に時間制限をつけた時、タイムアウト時に
Timeout::Error でなく ThreadError が発生します。

% ./ruby -v -rtimeout -rthread -e '
q = Queue.new
timeout(1) { q.pop }
'
ruby 1.9.0 (2008-01-06 revision 0) [i686-linux]
prelude.rb:10:in `unlock': Attempt to unlock a mutex which is locked by another thread (ThreadError)
        from prelude.rb:10:in `ensure in synchronize'
        from prelude.rb:10:in `synchronize'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/thread.rb:181:in `pop'
        from -e:3:in `block in <main>'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/timeout.rb:46:in `timeout'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/timeout.rb:65:in `timeout'
        from -e:3:in `<main>'
zsh: exit 1     ./ruby -v -rtimeout -rthread -e ' q = Queue.new timeout(1) { q.pop } '

1.8 では Timeout::Error でした。

% ruby-1.8 -v -rtimeout -rthread -e '
q = Queue.new
timeout(1) { q.pop }
'
ruby 1.8.6 (2007-12-14 patchlevel 5000) [i686-linux]
/home/akr/ruby/18/lib/ruby/1.8/timeout.rb:54: execution expired (Timeout::Error)
        from /home/akr/ruby/18/lib/ruby/1.8/timeout.rb:56:in `timeout'
        from /home/akr/ruby/18/lib/ruby/1.8/timeout.rb:76:in `timeout'
        from -e:3

おそらくこれのせいで、resolv がうまく動きません。

% ./ruby -v -rresolv -e '
ts = (1..10).map { Thread.new { p Resolv.getaddress("www.rubyist.net") } }
ts.each {|t| t.join }
'
ruby 1.9.0 (2008-01-06 revision 0) [i686-linux]
"221.186.184.67"
"221.186.184.67"
"221.186.184.67"
prelude.rb:10:in `unlock': Attempt to unlock a mutex which is locked by another thread (ThreadError)
        from prelude.rb:10:in `ensure in synchronize'
        from prelude.rb:10:in `synchronize'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/thread.rb:181:in `pop'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:495:in `block (2 levels) in each_resource'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/timeout.rb:46:in `timeout'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/timeout.rb:65:in `timeout'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:495:in `block in each_resource'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:891:in `block (3 levels) in resolv'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:889:in `each'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:889:in `block (2 levels) in resolv'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:888:in `each'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:888:in `block in resolv'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:886:in `each'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:886:in `resolv'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:485:in `each_resource'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:390:in `each_address'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:110:in `block in each_address'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:109:in `each'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:109:in `each_address'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:87:in `getaddress'
        from /home/akr/ruby/yarvo0/lib/ruby/1.9.0/resolv.rb:38:in `getaddress'
        from -e:2:in `block (2 levels) in <main>'
-- 
[田中 哲][たなか あきら][Tanaka Akira]