# Open-uri used by threads cause uninitialized constant OpenURI::Net

**URL:** <https://www.ruby-forum.com/t/open-uri-used-by-threads-cause-uninitialized-constant-openuri-net/116928>\
**Category:** Development\
**Created:** [October 11, 2007, 9:48am UTC](https://www.ruby-forum.com/t/open-uri-used-by-threads-cause-uninitialized-constant-openuri-net/116928 "2007-10-11T09:48:01Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Ken\_Date](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/53a042/32.png) [@Ken\_Date](https://www.ruby-forum.com/u/Ken_Date)\
**Post date:** [October 11, 2007, 9:48am UTC](https://www.ruby-forum.com/t/open-uri-used-by-threads-cause-uninitialized-constant-openuri-net/116928/1 "2007-10-11T09:48:01Z")

</div>

e$B$3$s$K$A$O!#0KC#$H?=$7$^$9!#e(B

e$BJ#?t%9%l%C%I$Ge(B open-uri e$B$Ne(B open e$B$r;H$&$H!"e(B  
uninitialized constant OpenURI::Net (NameError) e$B$K$J$j$^$9!#e(B

open-uri e$B$,%a%=%C%IFb$Ge(B net/http e$B$re(B require  
e$B$7$F$$$k$N$,4X78$7$F$$$k$h$&$G$9$,!"e(B  
e$B?\<DI$$$G$-$F$$$^$;$s!#e(B  
e$BJs9p$@$1$G$9$\_$^$;$s!#e(B

ruby e$B$Oe(B $ ./configure --enable-shared --program-suffix=19  
e$B$G:n$C$F$$$^$9!#e(B

$ cat test.rb  
require ‘open-uri’  
threads = (1…2).collect do  
Thread.start do  
open(‘[http://www.google.com/](http://www.google.com/)’)  
end  
end  
threads.each{|i|i.join}

$ ruby19 -v test.rb  
ruby 1.9.0 (2007-10-11 patchlevel 0) [i686-linux]  
/usr/local/lib/ruby/1.9/open-uri.rb:35: warning: method redefined;  
discarding old open  
/usr/local/lib/ruby/1.9/net/http.rb:1107: warning: instance variable  
@sspi\_enabled not initialized  
/usr/local/lib/ruby/1.9/net/http.rb:1107: warning: instance variable  
@sspi\_enabled not initialized  
/usr/local/lib/ruby/1.9/open-uri.rb:245:in `open_http': uninitialized constant OpenURI::Net (NameError) from /usr/local/lib/ruby/1.9/open-uri.rb:709:in `buffer\_open’  
from /usr/local/lib/ruby/1.9/open-uri.rb:193:in `block in open_loop' from /usr/local/lib/ruby/1.9/open-uri.rb:191:in `catch’  
from /usr/local/lib/ruby/1.9/open-uri.rb:191:in `open_loop' from /usr/local/lib/ruby/1.9/open-uri.rb:137:in `open\_uri’  
from /usr/local/lib/ruby/1.9/open-uri.rb:611:in `open' from /usr/local/lib/ruby/1.9/open-uri.rb:30:in `open’  
from test.rb:5:in `block (2 levels) in ’

---

<div class="post-metadata">

**Author:** ![Ken\_Date](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/53a042/32.png) [@Ken\_Date](https://www.ruby-forum.com/u/Ken_Date)\
**Post date:** [October 12, 2007, 2:17am UTC](https://www.ruby-forum.com/t/open-uri-used-by-threads-cause-uninitialized-constant-openuri-net/116928/2 "2007-10-12T02:17:12Z")

</div>

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e$B!!JX\>hJs9p$G$9$,e(B…

Thu, 11 Oct 2007 16:46:29 +0900 e$B$N%a!\<%k$K$F!"e(B  
“Ken Date” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) e$B$5$s$O=q$-$^$7$?e(B :

> e$B$3$s$K$A$O!#0KC#$H?=$7$^$9!#e(B
> 
> e$BJ#?t%9%l%C%I$Ge(B open-uri e$B$Ne(B open e$B$r;H$&$H!"e(B  
> uninitialized constant OpenURI::Net (NameError) e$B$K$J$j$^$9!#e(B

e$B!!$A$g$&$I\<+J,$,=q$$$F$$$k%W%m%0%i%`$G$bF1$8LdBj$,=P$F$$$?$N$G$9$,!"<+J,e(B e$B$N%W%m%0%i%`$KLdBj$,$"$k$N$+$H;W$C$F$$$^$7$?!#e(B

e$B!!0KC#$5$s$Ne(B test.rb e$B$re(B 1.8.6  
e$B4D6-$G\<B9T$7$?$H$3$m!"F1$8%(%i!\<$,=P$^$7$?!#e(B

ueda@fb5-stable[~]ruby -v  
ruby 1.8.6 (2007-03-13 patchlevel 0) [i386-freebsd6]  
ueda@fb5-stable[~]ruby test.rb  
/usr/local/lib/ruby/1.8/open-uri.rb:212:in `open_http': uninitialized constant OpenURI::Net (NameError) from test.rb:7:in `join’  
from test.rb:7  
from test.rb:7:in `each’  
from test.rb:7

e$B!!e(Bruby e$B$Oe(B FreeBSD e$B$Ne(B ports  
e$B$+$iF~$l$F$$$^$9!#$?$@;d$N4D6-$G$O\>e5-%(%i!\<e(B  
e$B$,=P$k\>l9g$H=P$J$$\>l9g$,$“$j!”\>o$K%(%i!\<$K$J$k$o$1$G$O$"$j$^$;$s!#e(B

# e$B%9%l%C%I$@$+$i$G$7$g$&$+!)e(B

e$B$J$_\<!$N$h$&$Ke(B net/http e$B$rL@\<(E_$Ke(B require  
e$B$9$k$H%(%i!\<$,=P$J$/$J$j$^$9!#e(B

— test.rb.orig 2007-10-12 09:15:29.000000000 +0900  
+++ test.rb 2007-10-12 09:14:50.000000000 +0900  
@@ -1,4 +1,5 @@  
require ‘open-uri’  
+require ‘net/http’

threads = (1…9).collect do  
Thread.start do

e$B0J\>e$G$9!#e(B

---

<div class="post-metadata">

**Author:** ![Ken\_Date](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/53a042/32.png) [@Ken\_Date](https://www.ruby-forum.com/u/Ken_Date)\
**Post date:** [October 13, 2007, 1:34pm UTC](https://www.ruby-forum.com/t/open-uri-used-by-threads-cause-uninitialized-constant-openuri-net/116928/3 "2007-10-13T13:34:52Z")

</div>

In article  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid),  
“Ken Date” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

> e$BJ#?t%9%l%C%I$Ge(B open-uri e$B$Ne(B open e$B$r;H$&$H!"e(B  
> uninitialized constant OpenURI::Net (NameError) e$B$K$J$j$^$9!#e(B
> 
> open-uri e$B$,%a%=%C%IFb$Ge(B net/http e$B$re(B require e$B$7$F$$$k$N$,4X78$7$F$$$k$h$&$G$9$,!"e(B  
> e$B?\<DI$$$G$-$F$$$^$;$s!#e(B  
> e$BJs9p$@$1$G$9$\_$^$;$s!#e(B

e$BC1=c2=$7$F$\_$^$7$?!#e(B

% cat t.rb  
sleep 0.1  
module M  
end  
% ./ruby -ve ’  
(1…2).map {|i|  
Thread.start {  
require “t”  
p [i, M]  
}  
}.map {|t| t.join }  
’  
ruby 1.9.0 (2007-10-13 patchlevel 0) [i686-linux]  
[1, M]  
-e:5:in `block (2 levels) in ': uninitialized constant M  
(NameError)