#5287 Thread dump on sysread stuck process

gistfile1.txt

"main@1" prio=5 tid=0x1 nid=NA runnable
  java.lang.Thread.State: RUNNABLE
	  at com.kenai.jffi.Foreign.invokeL6(Foreign.java:-1)
	  at com.kenai.jffi.Invoker.invokeL6(Invoker.java:455)
	  at jnr.enxio.channels.Native$LibC$jnr$ffi$2.kevent(Unknown Source:-1)
	  at jnr.enxio.channels.KQSelector.poll(KQSelector.java:168)
	  at jnr.enxio.channels.KQSelector.select(KQSelector.java:148)
	  at org.jruby.RubyThread.select(RubyThread.java:1883)
	  - locked <0x1886> (a java.lang.Object)
	  at org.jruby.RubyThread.select(RubyThread.java:1804)
	  at org.jruby.RubyIO.sysread(RubyIO.java:2999)
	  at org.jruby.RubyIO$INVOKER$i$0$1$sysread.call(RubyIO$INVOKER$i$0$1$sysread.gen:-1)
	  at org.jruby.internal.runtime.methods.JavaMethod$JavaMethodN.call(JavaMethod.java:797)
	  at org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:202)
	  at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:168)
	  at test.read.invokeOther1:sysread(test/read.rb:3)
	  at test.read.RUBY$block$\=test\|read\,rb$1(test/read.rb:3)
	  at java.lang.invoke.LambdaForm$DMH.194706439.invokeStatic_L6_L(LambdaForm$DMH:-1)
	  at java.lang.invoke.LambdaForm$BMH.2082232630.reinvoke(LambdaForm$BMH:-1)
	  at java.lang.invoke.LambdaForm$MH.1255395942.invokeExact_MT(LambdaForm$MH:-1)
	  at org.jruby.runtime.CompiledIRBlockBody.yieldDirect(CompiledIRBlockBody.java:146)
	  at org.jruby.runtime.IRBlockBody.yieldSpecific(IRBlockBody.java:85)
	  at org.jruby.runtime.Block.yieldSpecific(Block.java:134)
	  at org.jruby.RubyKernel.loop(RubyKernel.java:1412)
	  at org.jruby.RubyKernel$INVOKER$s$0$0$loop.call(RubyKernel$INVOKER$s$0$0$loop.gen:-1)
	  at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:334)
	  at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:149)
	  at org.jruby.runtime.callsite.CachingCallSite.callIter(CachingCallSite.java:156)
	  at test.read.invokeOther7:loop(test/read.rb:2)
	  at test.read.RUBY$block$\=test\|read\,rb$0(test/read.rb:2)
	  at java.lang.invoke.LambdaForm$DMH.194706439.invokeStatic_L6_L(LambdaForm$DMH:-1)
	  at java.lang.invoke.LambdaForm$BMH.2082232630.reinvoke(LambdaForm$BMH:-1)
	  at java.lang.invoke.LambdaForm$MH.1255395942.invokeExact_MT(LambdaForm$MH:-1)
	  at org.jruby.runtime.CompiledIRBlockBody.yieldDirect(CompiledIRBlockBody.java:146)
	  at org.jruby.runtime.BlockBody.yield(BlockBody.java:114)
	  at org.jruby.runtime.Block.yield(Block.java:165)
	  at org.jruby.RubyIO.ensureYieldClose(RubyIO.java:1160)
	  at org.jruby.RubyIO.open(RubyIO.java:1154)
	  at org.jruby.RubyKernel.open(RubyKernel.java:314)
	  at org.jruby.RubyKernel$INVOKER$s$0$3$open.call(RubyKernel$INVOKER$s$0$3$open.gen:-1)
	  at org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:206)
	  at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:355)
	  at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:180)
	  at org.jruby.runtime.callsite.CachingCallSite.callIter(CachingCallSite.java:187)
	  at test.read.invokeOther10:open(test/read.rb:1)
	  at test.read.RUBY$script(test/read.rb:1)
	  at java.lang.invoke.LambdaForm$DMH.134310351.invokeStatic_L7_L(LambdaForm$DMH:-1)
	  at java.lang.invoke.LambdaForm$BMH.1595472338.reinvoke(LambdaForm$BMH:-1)
	  at java.lang.invoke.LambdaForm$MH.1491623023.invoker(LambdaForm$MH:-1)
	  at java.lang.invoke.LambdaForm$MH.841483227.invokeExact_MT(LambdaForm$MH:-1)
	  at java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:627)
	  at org.jruby.ir.Compiler$1.load(Compiler.java:94)
	  at org.jruby.Ruby.runScript(Ruby.java:852)
	  at org.jruby.Ruby.runNormally(Ruby.java:771)
	  at org.jruby.Ruby.runNormally(Ruby.java:789)
	  at org.jruby.Ruby.runFromMain(Ruby.java:601)
	  at org.jruby.test.RubyIOTest.runScript(RubyIOTest.java:51)
	  at org.jruby.test.RubyIOTest.sysread(RubyIOTest.java:46)
	  at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
	  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	  at java.lang.reflect.Method.invoke(Method.java:498)
	  at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	  at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	  at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	  at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	  at org.junit.internal.runners.statements.ExpectException.evaluate(ExpectException.java:19)
	  at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	  at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	  at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	  at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	  at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	  at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	  at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	  at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	  at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	  at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	  at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	  at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	  at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)