Race condition in JRuby when Active Support is overriding Kernel.require
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Key: JRUBY-3310
URL: http://jira.codehaus.org/browse/JRUBY-3310
Project: JRuby
Issue Type: Bug
Components: Application Error
Affects Versions: JRuby 1.1.6
Environment: Solaris 10 (SPARC with 4 CPU), OSX 10.5 (Intel with 2
CPU). The problem probably occurs on any platform capable for running JRuby.
Reporter: Jean-Dominique Morani
Attachments: test.rb
A race condition occurs in JRuby (Cf. call stack below) when ActiveSupport
overrides kernel.require and that require 'mylib' is being called whitin a
thread (Cf. attached sample to reproduce the issue).
This error is especially a problem with rexml since it tries to require
'rexml/encodings/UTF-8.rb' (in $ruby_home/lib/ruby/1.8/rexml/encoding.rb (line
48)) everytime the parser is called.
Here is a snapshot of the callstack:
Exception in thread "Thread-2608" java.lang.ArrayIndexOutOfBoundsException
at org.jruby.RubyArray.fillNil(RubyArray.java:383)
at org.jruby.RubyArray.splice(RubyArray.java:871)
at org.jruby.RubyArray.concat(RubyArray.java:1425)
at
org.jruby.RubyArray$i_method_1_0$RUBYINVOKER$concat.call(org/jruby/RubyArray$i_method_1_0$RUBYINVOKER$concat.gen)
at
org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:114)
at
ruby.jit.ruby.Users.jdmorani.Downloads.jruby_minus_1_dot_1_dot_6.lib.ruby.gems.$1_dot_8.gems.activesupport_minus_2_dot_2_dot_2.lib.active_support.dependencies.new_constants_in264324716_1186545073.ensure_1$RUBY$__ensure___0(dependencies.rb:517)
at
ruby.jit.ruby.Users.jdmorani.Downloads.jruby_minus_1_dot_1_dot_6.lib.ruby.gems.$1_dot_8.gems.activesupport_minus_2_dot_2_dot_2.lib.active_support.dependencies.new_constants_in264324716_1186545073.__file__(dependencies.rb)
at
org.jruby.ast.executable.AbstractScript.__file__(AbstractScript.java:31)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:258)
at
org.jruby.runtime.callsite.CachingCallSite.callIter(CachingCallSite.java:139)
at
ruby.jit.ruby.Users.jdmorani.Downloads.jruby_minus_1_dot_1_dot_6.lib.ruby.gems.$1_dot_8.gems.activesupport_minus_2_dot_2_dot_2.lib.active_support.dependencies.require1129611392_1186545073.rescue_1$RUBY$__rescue___0(dependencies.rb:153)
at
ruby.jit.ruby.Users.jdmorani.Downloads.jruby_minus_1_dot_1_dot_6.lib.ruby.gems.$1_dot_8.gems.activesupport_minus_2_dot_2_dot_2.lib.active_support.dependencies.require1129611392_1186545073.__file__(dependencies.rb)
at
org.jruby.ast.executable.AbstractScript.__file__(AbstractScript.java:31)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:237)
at
org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:114)
at $_dot_.test.block_1$RUBY$__block__(test.rb:19)
at $_dot_.testBlockCallback$block_1$RUBY$__block__xx1.call(Unknown
Source)
at org.jruby.runtime.CompiledBlock.yield(CompiledBlock.java:120)
at org.jruby.runtime.BlockBody.call(BlockBody.java:64)
at org.jruby.runtime.BlockBody.call(BlockBody.java:70)
at org.jruby.runtime.Block.call(Block.java:116)
at org.jruby.RubyProc.call(RubyProc.java:205)
at org.jruby.RubyProc.call(RubyProc.java:187)
at org.jruby.internal.runtime.RubyRunnable.run(RubyRunnable.java:90)
at java.lang.Thread.run(Thread.java:637)
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