org.rubyforge.debugcommons.RubyDebuggerException: Unable to read added breakpoint number in the specified timeout [15s]
   at org.rubyforge.debugcommons.ReadersSupport.poll(ReadersSupport.java:224)
   at org.rubyforge.debugcommons.ReadersSupport.readAddedBreakpointNo(ReadersSupport.java:200)
   at org.rubyforge.debugcommons.RubyDebuggerProxy.addBreakpoint(RubyDebuggerProxy.java:209)
   at org.rubyforge.debugcommons.RubyDebuggerProxy.setBreakpoints(RubyDebuggerProxy.java:191)
   at org.rubyforge.debugcommons.RubyDebuggerProxy.attachToClassicDebugger(RubyDebuggerProxy.java:151)
   at org.rubyforge.debugcommons.RubyDebuggerProxy.attach(RubyDebuggerProxy.java:121)
   at org.netbeans.modules.ruby.debugger.RubyDebugger.debug(RubyDebugger.java:143)
   at org.netbeans.modules.ruby.platform.execution.RubyProcessCreator.call(RubyProcessCreator.java:117)
   at org.netbeans.modules.ruby.platform.execution.RubyProcessCreator.call(RubyProcessCreator.java:63)
   at org.netbeans.api.extexecution.ExecutionService$3.call(ExecutionService.java:257)
   at org.netbeans.api.extexecution.ExecutionService$3.call(ExecutionService.java:233)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
   at java.util.concurrent.FutureTask.run(FutureTask.java:138)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
   at java.lang.Thread.run(Thread.java:662)