ThreadService.getRubyThreadFromThread supports only one non-rubynative thread
at a time.
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Key: JRUBY-2868
URL: http://jira.codehaus.org/browse/JRUBY-2868
Project: JRuby
Issue Type: Bug
Components: Embedding
Affects Versions: JRuby 1.1.3
Environment: JRuby when embedded inside a java application.
Reporter: Peter Williams
Priority: Critical
Consider JRuby running in embedded mode in a multithreaded scenario. Java
thread 1 creates the runtime. Later, java thread 2 invokes a ruby method. If
this method calls getActiveRubyThreads to obtain RubyThread instances for all
the active threads, the entry representing java thread 2 will actually be the
RubyThread instance for java thread 1.
This is because in ThreadService.getRubyThreadFromThread(), all non-rubynative
threads are mapped to singleton RubyThread masterContext.getThread(), which,
for the example above, will be the RubyThread representing the java thread that
originally created the runtime.
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