Stuck when loading marshalled data > 32000 bytes from IO stream
---------------------------------------------------------------
Key: JRUBY-5002
URL: http://jira.codehaus.org/browse/JRUBY-5002
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.5.1, JRuby 1.x+
Environment: OS X / Linux with Java 6
Reporter: Wouter de Bie
Priority: Critical
When loading a marshaled object larger than 32000 bytes, JRuby hangs.
This behavior can be reproduced with the following script:
class A
attr_accessor :a
end
100.times do |x|
data = "a" * (1000 * x + 1000)
y = A.new
y.a = data
File.open("x","w") do |f|
Marshal.dump(y, f)
end
puts "File of #{x * 1000 + 1} bytes written"
File.open("x") do |f|
Marshal.load(f)
end
end
A thread dump gives the following:
"main" prio=5 tid=101801000 nid=0x100501000 runnable [1004ff000]
java.lang.Thread.State: RUNNABLE
at
org.jruby.runtime.marshal.UnmarshalStream.unmarshalString(UnmarshalStream.java:249)
at org.jruby.RubyString.unmarshalFrom(RubyString.java:6902)
at
org.jruby.runtime.marshal.UnmarshalStream.unmarshalObjectDirectly(UnmarshalStream.java:146)
at
org.jruby.runtime.marshal.UnmarshalStream.unmarshalObject(UnmarshalStream.java:95)
at
org.jruby.runtime.marshal.UnmarshalStream.defaultVariablesUnmarshal(UnmarshalStream.java:313)
at org.jruby.RubyClass$6.unmarshalFrom(RubyClass.java:1116)
at org.jruby.RubyClass.unmarshal(RubyClass.java:1086)
at
org.jruby.runtime.marshal.UnmarshalStream.defaultObjectUnmarshal(UnmarshalStream.java:302)
at
org.jruby.runtime.marshal.UnmarshalStream.unmarshalObjectDirectly(UnmarshalStream.java:200)
at
org.jruby.runtime.marshal.UnmarshalStream.unmarshalObject(UnmarshalStream.java:95)
at org.jruby.RubyMarshal.load(RubyMarshal.java:165)
at
org.jruby.RubyMarshal$s_method_0_1$RUBYFRAMEDINVOKER$load.call(org/jruby/RubyMarshal$s_method_0_1$RUBYFRAMEDINVOKER$load.gen:65535)
....
This behavior doesn't appear when the marshaled data is first loaded into a
string (with File.read) and then passed on to Marshal#load
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