DRb.stop_service throws class cast exception under jruby. Exception: null:-1:in `org.jruby.RubyExceptionInvokerinitializexx1.call': java.lang.ClassCastException: org.jruby.RubyObject cannot be cast to org.jruby.RubyException (NativeException) from InvocationCallback.java:49:in `org.jruby.runtime.callback.InvocationCallback.execute' from FullFunctionCallbackMethod.java:77:in `org.jruby.internal.runtime.methods.FullFunctionCallbackMethod.internalCall' from AbstractMethod.java:64:in `org.jruby.internal.runtime.methods.AbstractMethod.call' from RubyObject.java:473:in `org.jruby.RubyObject.callMethod' from RubyObject.java:382:in `org.jruby.RubyObject.callMethod' from RubyObject.java:553:in `org.jruby.RubyObject.callInit' from RubyClass.java:254:in `org.jruby.RubyClass.newInstance' from RaiseException.java:60:in `org.jruby.exceptions.RaiseException.<init>' ... 130 levels... from /usr/local/jruby/lib/ruby/1.8/drb/drb.rb:1605:in `main_loop' from /usr/local/jruby/lib/ruby/1.8/drb/drb.rb:1430:in `run' from /usr/local/jruby/lib/ruby/1.8/drb/drb.rb:1348:in `start' Complete Java stackTrace java.lang.ClassCastException: org.jruby.RubyObject cannot be cast to org.jruby.RubyException at org.jruby.RubyExceptionInvokerinitializexx1.call(Unknown Source) at org.jruby.runtime.callback.InvocationCallback.execute(InvocationCallback.java:49) at org.jruby.internal.runtime.methods.FullFunctionCallbackMethod.internalCall(FullFunctionCallbackMethod.java:77) at org.jruby.internal.runtime.methods.AbstractMethod.call(AbstractMethod.java:64) at org.jruby.RubyObject.callMethod(RubyObject.java:473) at org.jruby.RubyObject.callMethod(RubyObject.java:382) at org.jruby.RubyObject.callInit(RubyObject.java:553) at org.jruby.RubyClass.newInstance(RubyClass.java:254) at org.jruby.exceptions.RaiseException.<init>(RaiseException.java:60) at org.jruby.ext.socket.RubyIPSocket.sockerr(RubyIPSocket.java:67) at org.jruby.ext.socket.RubyTCPServer.accept(RubyTCPServer.java:108) at org.jruby.ext.socket.RubyTCPServerInvokeraccept0.call(Unknown Source) at org.jruby.runtime.callback.FastInvocationCallback.execute(FastInvocationCallback.java:49) at org.jruby.internal.runtime.methods.SimpleCallbackMethod.call(SimpleCallbackMethod.java:80) at org.jruby.RubyObject.callMethod(RubyObject.java:473) at org.jruby.RubyObject.callMethod(RubyObject.java:395) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:320) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:934) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:278) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:1436) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:278) at org.jruby.evaluator.EvaluationState.eval(EvaluationState.java:156) at org.jruby.internal.runtime.methods.DefaultMethod.internalCall(DefaultMethod.java:157) at org.jruby.internal.runtime.methods.AbstractMethod.call(AbstractMethod.java:64) at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:113) at org.jruby.RubyObject.callMethod(RubyObject.java:473) at org.jruby.RubyObject.callMethod(RubyObject.java:395) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:320) at org.jruby.evaluator.EvaluationState.setupArgs(EvaluationState.java:1786) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:301) at org.jruby.evaluator.EvaluationState.eval(EvaluationState.java:156) at org.jruby.internal.runtime.methods.DefaultMethod.internalCall(DefaultMethod.java:157) at org.jruby.internal.runtime.methods.AbstractMethod.call(AbstractMethod.java:64) at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:113) at org.jruby.RubyObject.callMethod(RubyObject.java:473) at org.jruby.RubyObject.callMethod(RubyObject.java:390) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:1420) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:1436) at org.jruby.evaluator.EvaluationState.evalInternal(EvaluationState.java:717) at org.jruby.evaluator.EvaluationState.eval(EvaluationState.java:156) at org.jruby.internal.runtime.methods.EvaluateCallable.call(EvaluateCallable.java:61) at org.jruby.runtime.Block.yield(Block.java:189) at org.jruby.runtime.Block.call(Block.java:158) at org.jruby.RubyProc.call(RubyProc.java:123) at org.jruby.RubyProc.call(RubyProc.java:104) at org.jruby.internal.runtime.RubyNativeThread.run(RubyNativeThread.java:74) test_client.rb require 'drb' DRb.start_service() obj = DRbObject.new(nil, 'druby://localhost:9000') #puts "First sum is #{obj.add(1, 2, 3)}" #puts "Second sum is #{obj.add(10,20,30)}" puts "Shutting the service down remotely" obj.shutdown() puts "Done!" test_server.rb require 'drb' class TestServer def add(*args) args.inject {|n,v| n+v} end def shutdown DRb.stop_service end end server = TestServer.new DRb.start_service('druby://localhost:9000', server) DRb.thread.join