Feature #5980
closed
Trying to Load File When Too Many Files Open Should Raise Something Other Than Plain LoadError
Description
Currently encountering too many open file handles when trying to load/require a file simply raises a LoadError. It's not easy to determine that the root cause is exhaustion (see below for demonstration).
The error should be changed either to an actual EMFILE, a wrapper error, or at least alter the LoadError message to indicate the actual cause.
$ echo "p 1" > /tmp/test.rb
$ ruby -e 'fs = []; 250.times {|i| fs << File.open("/tmp/tst#{i}", "w") }; require "/tmp/test.rb"'
1
$ ruby -e 'fs = []; 252.times {|i| fs << File.open("/tmp/tst#{i}", "w") }'
-e:1:in initialize': Too many open files - /tmp/tst251 (Errno::EMFILE) from -e:1:in open'
from -e:1:in block in <main>' from -e:1:in times'
from -e:1:in `'
$ ruby -e 'fs = []; 251.times {|i| fs << File.open("/tmp/tst#{i}", "w") }; require "/tmp/test.rb"'
/Users/rue/.rvm/rubies/ruby-head/lib/ruby/site_ruby/2.0.0/rubygems.rb:203:in try_activate': cannot load such file -- rubygems/specification (LoadError) from /Users/rue/.rvm/rubies/ruby-head/lib/ruby/site_ruby/2.0.0/rubygems/custom_require.rb:58:in rescue in require'
from /Users/rue/.rvm/rubies/ruby-head/lib/ruby/site_ruby/2.0.0/rubygems/custom_require.rb:35:in require' from -e:1:in '
$ ruby -v
ruby 2.0.0dev (2012-02-07 trunk 34462) [x86_64-darwin11.3.0]
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