REXML unusable from multiple threads: java.lang.ClassCastException:
org.jruby.RubyString
-----------------------------------------------------------------------------------------
Key: JRUBY-2494
URL: http://jira.codehaus.org/browse/JRUBY-2494
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.1.1
Environment: osx leopord.
Reporter: Kris Rasmussen
Attachments: test_threading.rb
I am unable to use REXML from multiple threads with JRuby. If multiple threads
create a document and enumerate elements, the java exception below is thrown. I
have looked over the REXML code and didn't see any clear signs that it is not
thread safe so I'm wondering if this issue is isolated to JRuby. I attached a
test script. that seems to reproduce the exception on nearly every run.
Exception in thread "Ruby Thread14823514" java.lang.ClassCastException:
org.jruby.RubyString
at org.jruby.RubyNilInvoker$nil_p_method_0_0.call(Unknown Source)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:272)
at
ruby.jit.ruby.usr.local.jruby.lib.ruby.$1_dot_8.rexml.element.namespace14942221_15180414.__file__(/usr/local/jruby/lib/ruby/1.8/rexml/element.rb:236)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:144)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:240)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:657)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:648)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at org.jruby.evaluator.ASTInterpreter.notNode(ASTInterpreter.java:1368)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:420)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at org.jruby.runtime.InterpretedBlock.yield(InterpretedBlock.java:150)
at org.jruby.runtime.InterpretedBlock.yield(InterpretedBlock.java:115)
at org.jruby.runtime.Block.yield(Block.java:109)
at org.jruby.RubyArray.reject_bang(RubyArray.java:1715)
at org.jruby.RubyArray.delete_if(RubyArray.java:1732)
at org.jruby.RubyArrayInvoker$delete_if_method_0_0.call(Unknown Source)
at
org.jruby.internal.runtime.methods.JavaMethod$JavaMethodZeroBlock.call(JavaMethod.java:101)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.cacheAndCall(CallSite.java:87)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:256)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:662)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.caseNode(ASTInterpreter.java:729)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:310)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at
org.jruby.evaluator.ASTInterpreter.whileNode(ASTInterpreter.java:1761)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:489)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.cacheAndCall(CallSite.java:102)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:243)
at
org.jruby.evaluator.ASTInterpreter.fCallNode(ASTInterpreter.java:1100)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:354)
at
org.jruby.evaluator.ASTInterpreter.localAsgnNode(ASTInterpreter.java:1256)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:387)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.cacheAndCall(CallSite.java:102)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:243)
at
org.jruby.evaluator.ASTInterpreter.fCallNode(ASTInterpreter.java:1100)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:354)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.cacheAndCall(CallSite.java:102)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:243)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:657)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.cacheAndCall(CallSite.java:102)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:243)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:657)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at
org.jruby.evaluator.ASTInterpreter.localAsgnNode(ASTInterpreter.java:1256)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:387)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.cacheAndCall(CallSite.java:102)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:243)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:657)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at org.jruby.runtime.InterpretedBlock.yield(InterpretedBlock.java:150)
at org.jruby.runtime.InterpretedBlock.call(InterpretedBlock.java:103)
at org.jruby.runtime.Block.call(Block.java:105)
at org.jruby.RubyProc.call(RubyProc.java:203)
at org.jruby.RubyProc.call(RubyProc.java:182)
at
org.jruby.internal.runtime.RubyNativeThread.run(RubyNativeThread.java:72)
Exception in thread "Ruby Thread3004038" java.lang.ClassCastException:
org.jruby.RubyString
at org.jruby.RubyNilInvoker$nil_p_method_0_0.call(Unknown Source)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:272)
at
ruby.jit.ruby.usr.local.jruby.lib.ruby.$1_dot_8.rexml.element.namespace14942221_15180414.__file__(/usr/local/jruby/lib/ruby/1.8/rexml/element.rb:236)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:144)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:78)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:304)
at
ruby.jit.ruby.usr.local.jruby.lib.ruby.$1_dot_8.rexml.xpath_parser.get_namespace8161005_15180414.__file__(/usr/local/jruby/lib/ruby/1.8/rexml/xpath_parser.rb:146)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:144)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:240)
at
org.jruby.evaluator.ASTInterpreter.fCallNode(ASTInterpreter.java:1100)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:354)
at org.jruby.evaluator.ASTInterpreter.dAsgnNode(ASTInterpreter.java:858)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:328)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at org.jruby.runtime.InterpretedBlock.yield(InterpretedBlock.java:150)
at org.jruby.runtime.InterpretedBlock.yield(InterpretedBlock.java:115)
at org.jruby.runtime.Block.yield(Block.java:109)
at org.jruby.RubyArray.reject_bang(RubyArray.java:1715)
at org.jruby.RubyArray.delete_if(RubyArray.java:1732)
at org.jruby.RubyArrayInvoker$delete_if_method_0_0.call(Unknown Source)
at
org.jruby.internal.runtime.methods.JavaMethod$JavaMethodZeroBlock.call(JavaMethod.java:101)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:253)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:662)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.caseNode(ASTInterpreter.java:729)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:310)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at
org.jruby.evaluator.ASTInterpreter.whileNode(ASTInterpreter.java:1761)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:489)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:240)
at
org.jruby.evaluator.ASTInterpreter.fCallNode(ASTInterpreter.java:1100)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:354)
at
org.jruby.evaluator.ASTInterpreter.localAsgnNode(ASTInterpreter.java:1256)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:387)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:240)
at
org.jruby.evaluator.ASTInterpreter.fCallNode(ASTInterpreter.java:1100)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:354)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:240)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:657)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:240)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:657)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at
org.jruby.evaluator.ASTInterpreter.localAsgnNode(ASTInterpreter.java:1256)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:387)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at
org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:176)
at
org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:66)
at
org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:240)
at org.jruby.evaluator.ASTInterpreter.callNode(ASTInterpreter.java:657)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:308)
at org.jruby.evaluator.ASTInterpreter.blockNode(ASTInterpreter.java:631)
at
org.jruby.evaluator.ASTInterpreter.evalInternal(ASTInterpreter.java:302)
at org.jruby.evaluator.ASTInterpreter.eval(ASTInterpreter.java:168)
at org.jruby.runtime.InterpretedBlock.yield(InterpretedBlock.java:150)
at org.jruby.runtime.InterpretedBlock.call(InterpretedBlock.java:103)
at org.jruby.runtime.Block.call(Block.java:105)
at org.jruby.RubyProc.call(RubyProc.java:203)
at org.jruby.RubyProc.call(RubyProc.java:182)
at
org.jruby.internal.runtime.RubyNativeThread.run(RubyNativeThread.java:72)
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