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From "Stefano Bagnara (JIRA)" <server-...@james.apache.org>
Subject [jira] Commented: (JSPF-65) Possible racing issue in StagedMultipleSPFExecutor or dnsjnio
Date Tue, 05 Aug 2008 10:38:44 GMT

    [ https://issues.apache.org/jira/browse/JSPF-65?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12619837#action_12619837
] 

Stefano Bagnara commented on JSPF-65:
-------------------------------------

It happened again, almost identical stack (pruned to the interesting threads):

"DnsSelect" daemon prio=10 tid=0x08576ff0 nid=0x14 runnable [0xb36be000..0xb36bedb8]
	at sun.nio.ch.DevPollArrayWrapper.poll0(Native Method)
	at sun.nio.ch.DevPollArrayWrapper.poll(DevPollArrayWrapper.java:164)
	at sun.nio.ch.DevPollSelectorImpl.doSelect(DevPollSelectorImpl.java:68)
	at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
	- locked <0xf3612350> (a sun.nio.ch.Util$1)
	- locked <0xf3612340> (a java.util.Collections$UnmodifiableSet)
	- locked <0xf3611050> (a sun.nio.ch.DevPollSelectorImpl)
	at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
	at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:84)
	at uk.nominet.dnsjnio.DnsController.selectLoop(Unknown Source)
	at uk.nominet.dnsjnio.DnsController.access$000(Unknown Source)
	at uk.nominet.dnsjnio.DnsController$1.run(Unknown Source)

"DnsTimer" daemon prio=10 tid=0x0835c878 nid=0x13 waiting on condition [0xb3738000..0xb3738b38]
	at java.lang.Thread.sleep(Native Method)
	at uk.nominet.dnsjnio.Timer$1.run(Unknown Source)

"LookupAsynchResolver" prio=10 tid=0x08576e68 nid=0x12 in Object.wait() [0xb3779000..0xb3779c38]
	at java.lang.Object.wait(Native Method)
	- waiting on <0xf3610ea0> (a uk.nominet.dnsjnio.ResponseQueue)
	at java.lang.Object.wait(Object.java:474)
	at uk.nominet.dnsjnio.ResponseQueue.getItem(Unknown Source)
	- locked <0xf3610ea0> (a uk.nominet.dnsjnio.ResponseQueue)
	at org.xbill.DNS.LookupAsynch$ProcessingTask.run(Unknown Source)
	- locked <0xf3610ea0> (a uk.nominet.dnsjnio.ResponseQueue)
	at java.lang.Thread.run(Thread.java:595)

"SPFExecutor" daemon prio=10 tid=0x0857b790 nid=0x11 in Object.wait() [0xb37ba000..0xb37bacb8]
	at java.lang.Object.wait(Native Method)
	- waiting on <0xf3608d30> (a org.apache.james.jspf.executor.StagedMultipleSPFExecutor$ResponseQueueImpl)
	at java.lang.Object.wait(Object.java:474)
	at org.apache.james.jspf.executor.StagedMultipleSPFExecutor$ResponseQueueImpl.removeResponse(StagedMultipleSPFExecutor.java:64)
	- locked <0xf3608d30> (a org.apache.james.jspf.executor.StagedMultipleSPFExecutor$ResponseQueueImpl)
	at org.apache.james.jspf.executor.StagedMultipleSPFExecutor.run(StagedMultipleSPFExecutor.java:175)
	at java.lang.Thread.run(Thread.java:595)

"EnbrResolutionThread" prio=10 tid=0x0857b500 nid=0x10 in Object.wait() [0xb37fb000..0xb37fbbb8]
	at java.lang.Object.wait(Native Method)
	- waiting on <0xf3618750> (a uk.nominet.dnsjnio.ResponseQueue)
	at java.lang.Object.wait(Object.java:474)
	at uk.nominet.dnsjnio.ResponseQueue.getItem(Unknown Source)
	- locked <0xf3618750> (a uk.nominet.dnsjnio.ResponseQueue)
	at org.xbill.DNS.ExtendedNonblockingResolver$ResolutionThread.run(Unknown Source)

"EnbrResolutionThread" prio=10 tid=0x085301e8 nid=0xf in Object.wait() [0xb383c000..0xb383ca38]
	at java.lang.Object.wait(Native Method)
	- waiting on <0xf3618aa8> (a uk.nominet.dnsjnio.ResponseQueue)
	at java.lang.Object.wait(Object.java:474)
	at uk.nominet.dnsjnio.ResponseQueue.getItem(Unknown Source)
	- locked <0xf3618aa8> (a uk.nominet.dnsjnio.ResponseQueue)
	at org.xbill.DNS.ExtendedNonblockingResolver$ResolutionThread.run(Unknown Source)

"Thread-1" daemon prio=10 tid=0x0854ddb0 nid=0xe runnable [0xb387d000..0xb387dab8]
	at java.net.PlainDatagramSocketImpl.receive0(Native Method)
	- locked <0xf375b878> (a java.net.PlainDatagramSocketImpl)
	at java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:136)
	- locked <0xf375b878> (a java.net.PlainDatagramSocketImpl)
	at java.net.DatagramSocket.receive(DatagramSocket.java:712)
	- locked <0xf375b8b8> (a java.net.DatagramPacket)
	- locked <0xf375b8d8> (a java.net.DatagramSocket)
	at org.apache.james.jspf.dnsserver.UDPListener.run(UDPListener.java:130)
	at java.lang.Thread.run(Thread.java:595)

"Thread-0" daemon prio=10 tid=0x085315d8 nid=0xd runnable [0xb38be000..0xb38bed38]
	at java.net.PlainSocketImpl.socketAccept(Native Method)
	at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
	- locked <0xf375b928> (a java.net.SocksSocketImpl)
	at java.net.ServerSocket.implAccept(ServerSocket.java:450)
	at java.net.ServerSocket.accept(ServerSocket.java:421)
	at org.apache.james.jspf.dnsserver.TCPListener.run(TCPListener.java:128)
	at java.lang.Thread.run(Thread.java:595)

"main" prio=10 tid=0x080745c0 nid=0x1 in Object.wait() [0x08046000..0x08046eb0]
	at java.lang.Object.wait(Native Method)
	- waiting on <0xf3604168> (a org.apache.james.jspf.executor.FutureSPFResult)
	at java.lang.Object.wait(Object.java:474)
	at org.apache.james.jspf.executor.FutureSPFResult.checkReady(FutureSPFResult.java:56)
	- locked <0xf3604168> (a org.apache.james.jspf.executor.FutureSPFResult)
	at org.apache.james.jspf.executor.FutureSPFResult.getResult(FutureSPFResult.java:99)
	at org.apache.james.jspf.AbstractYamlTest.verifyResult(AbstractYamlTest.java:296)
	at org.apache.james.jspf.AbstractYamlTest.runTest(AbstractYamlTest.java:264)
	at junit.framework.TestCase.runBare(TestCase.java:127)
	at junit.framework.TestResult$1.protect(TestResult.java:106)
	at junit.framework.TestResult.runProtected(TestResult.java:124)
	at junit.framework.TestResult.run(TestResult.java:109)
	at junit.framework.TestCase.run(TestCase.java:118)
	at junit.framework.TestSuite.runTest(TestSuite.java:208)
	at junit.framework.TestSuite.run(TestSuite.java:203)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213)
	at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
	at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
	at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:334)
	at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:980)


> Possible racing issue in StagedMultipleSPFExecutor or dnsjnio
> -------------------------------------------------------------
>
>                 Key: JSPF-65
>                 URL: https://issues.apache.org/jira/browse/JSPF-65
>             Project: jSPF
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.9.6
>            Reporter: Stefano Bagnara
>            Priority: Critical
>             Fix For: 0.9.7
>
>
> Today I found an hudson build hang on jspf tests.
> It was good enough I have been able to take a stack dump of the build process.
> I'm not sure if the problem is in jSPF or dnsjnio, but here is the stack.. I have to
investigate on this.
> I ran jSPF tests hundreds of times and never seen this. Hudson built jspf 18 times, stuck
only once.. let's hope this will show up more often.
> Full thread dump Java HotSpot(TM) Server VM (1.5.0_14-b03 mixed mode):
> "Thread-12" prio=10 tid=0x084f7278 nid=0x2b runnable [0xb2d40000..0xb2d40cb8]
> 	at java.io.FileInputStream.readBytes(Native Method)
> 	at java.io.FileInputStream.read(FileInputStream.java:194)
> 	at java.lang.UNIXProcess$DeferredCloseInputStream.read(UNIXProcess.java:227)
> 	at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:411)
> 	at sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:453)
> 	at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:183)
> 	- locked <0xf4eff148> (a java.io.InputStreamReader)
> 	at java.io.InputStreamReader.read(InputStreamReader.java:167)
> 	at java.io.BufferedReader.fill(BufferedReader.java:136)
> 	at java.io.BufferedReader.readLine(BufferedReader.java:299)
> 	- locked <0xf4eff148> (a java.io.InputStreamReader)
> 	at java.io.BufferedReader.readLine(BufferedReader.java:362)
> 	at org.apache.maven.surefire.booter.shade.org.codehaus.plexus.util.cli.StreamPumper.run(StreamPumper.java:153)
> "Thread-11" prio=10 tid=0x09688cb0 nid=0x2a runnable [0xb2d81000..0xb2d81c38]
> 	at java.io.FileInputStream.readBytes(Native Method)
> 	at java.io.FileInputStream.read(FileInputStream.java:194)
> 	at java.lang.UNIXProcess$DeferredCloseInputStream.read(UNIXProcess.java:227)
> 	at java.io.BufferedInputStream.read1(BufferedInputStream.java:254)
> 	at java.io.BufferedInputStream.read(BufferedInputStream.java:313)
> 	- locked <0xf4efa160> (a java.io.BufferedInputStream)
> 	at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:411)
> 	at sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:453)
> 	at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:183)
> 	- locked <0xf4efc608> (a java.io.InputStreamReader)
> 	at java.io.InputStreamReader.read(InputStreamReader.java:167)
> 	at java.io.BufferedReader.fill(BufferedReader.java:136)
> 	at java.io.BufferedReader.readLine(BufferedReader.java:299)
> 	- locked <0xf4efc608> (a java.io.InputStreamReader)
> 	at java.io.BufferedReader.readLine(BufferedReader.java:362)
> 	at org.apache.maven.surefire.booter.shade.org.codehaus.plexus.util.cli.StreamPumper.run(StreamPumper.java:153)
> "process reaper" daemon prio=10 tid=0x08478528 nid=0x29 runnable [0xb37ae000..0xb37aeb38]
> 	at java.lang.UNIXProcess.waitForProcessExit(Native Method)
> 	at java.lang.UNIXProcess.access$900(UNIXProcess.java:17)
> 	at java.lang.UNIXProcess$2$1.run(UNIXProcess.java:86)
> "pool-1-thread-1" prio=10 tid=0x086f9c68 nid=0xe in Object.wait() [0xb39fd000..0xb39feab8]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xf4ef7ec8> (a java.lang.UNIXProcess)
> 	at java.lang.Object.wait(Object.java:474)
> 	at java.lang.UNIXProcess.waitFor(UNIXProcess.java:115)
> 	- locked <0xf4ef7ec8> (a java.lang.UNIXProcess)
> 	at org.apache.maven.surefire.booter.shade.org.codehaus.plexus.util.cli.CommandLineUtils.executeCommandLine(CommandLineUtils.java:143)
> 	at org.apache.maven.surefire.booter.shade.org.codehaus.plexus.util.cli.CommandLineUtils.executeCommandLine(CommandLineUtils.java:95)
> 	at org.apache.maven.surefire.booter.SurefireBooter.fork(SurefireBooter.java:662)
> 	at org.apache.maven.surefire.booter.SurefireBooter.forkSuites(SurefireBooter.java:468)
> 	at org.apache.maven.surefire.booter.SurefireBooter.runSuitesForkOnce(SurefireBooter.java:368)
> 	at org.apache.maven.surefire.booter.SurefireBooter.run(SurefireBooter.java:241)
> 	at org.apache.maven.plugin.surefire.SurefirePlugin.execute(SurefirePlugin.java:481)
> 	at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:447)
> 	at hudson.maven.agent.PluginManagerInterceptor.executeMojo(PluginManagerInterceptor.java:136)
> 	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539)
> 	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:480)
> 	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:459)
> 	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:311)
> 	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:278)
> 	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
> 	at org.apache.maven.lifecycle.LifecycleExecutorInterceptor.execute(LifecycleExecutorInterceptor.java:42)
> 	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:333)
> 	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:126)
> 	at org.apache.maven.cli.MavenCli.main(MavenCli.java:282)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
> 	at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
> 	at hudson.maven.agent.Main.launch(Main.java:133)
> 	at hudson.maven.MavenBuilder.call(MavenBuilder.java:129)
> 	at hudson.maven.MavenModuleSetBuild$Builder.call(MavenModuleSetBuild.java:528)
> 	at hudson.maven.MavenModuleSetBuild$Builder.call(MavenModuleSetBuild.java:474)
> 	at hudson.remoting.UserRequest.perform(UserRequest.java:69)
> 	at hudson.remoting.UserRequest.perform(UserRequest.java:23)
> 	at hudson.remoting.Request$2.run(Request.java:206)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
> 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:123)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
> 	at java.lang.Thread.run(Thread.java:595)
> "Channel reader thread: channel" prio=10 tid=0x0854e480 nid=0xd runnable [0xb3c9e000..0xb3c9ed38]
> 	at java.net.SocketInputStream.socketRead0(Native Method)
> 	at java.net.SocketInputStream.read(SocketInputStream.java:129)
> 	at java.net.SocketInputStream.read(SocketInputStream.java:182)
> 	at java.io.FilterInputStream.read(FilterInputStream.java:66)
> 	at java.io.ObjectInputStream$PeekInputStream.peek(ObjectInputStream.java:2196)
> 	at java.io.ObjectInputStream$BlockDataInputStream.peek(ObjectInputStream.java:2486)
> 	at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2496)
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1273)
> 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
> 	at hudson.remoting.Channel$ReaderThread.run(Channel.java:576)
> "Low Memory Detector" daemon prio=10 tid=0x08192100 nid=0xb runnable [0x00000000..0x00000000]
> "CompilerThread1" daemon prio=10 tid=0x08190868 nid=0xa waiting on condition [0x00000000..0xf8078048]
> "CompilerThread0" daemon prio=10 tid=0x0818fa38 nid=0x9 waiting on condition [0x00000000..0xf80b8ec8]
> "AdapterThread" daemon prio=10 tid=0x0818ebe0 nid=0x8 waiting on condition [0x00000000..0x00000000]
> "Signal Dispatcher" daemon prio=10 tid=0x0818de18 nid=0x7 waiting on condition [0x00000000..0x00000000]
> "Finalizer" daemon prio=10 tid=0x08181880 nid=0x6 in Object.wait() [0xf817c000..0xf817cab8]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xb7ecc378> (a java.lang.ref.ReferenceQueue$Lock)
> 	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:120)
> 	- locked <0xb7ecc378> (a java.lang.ref.ReferenceQueue$Lock)
> 	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:136)
> 	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
> "Reference Handler" daemon prio=10 tid=0x08181380 nid=0x5 in Object.wait() [0xf81bd000..0xf81bdd38]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xb8057e80> (a java.lang.ref.Reference$Lock)
> 	at java.lang.Object.wait(Object.java:474)
> 	at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
> 	- locked <0xb8057e80> (a java.lang.ref.Reference$Lock)
> "main" prio=10 tid=0x080748f8 nid=0x1 in Object.wait() [0x08046000..0x08046d78]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xb80ad328> (a hudson.remoting.Channel)
> 	at java.lang.Object.wait(Object.java:474)
> 	at hudson.remoting.Channel.join(Channel.java:479)
> 	- locked <0xb80ad328> (a hudson.remoting.Channel)
> 	at hudson.remoting.Launcher.main(Launcher.java:99)
> 	at hudson.remoting.Launcher.main(Launcher.java:82)
> 	at hudson.remoting.Launcher.main(Launcher.java:78)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at hudson.maven.agent.Main.main(Main.java:91)
> 	at hudson.maven.agent.Main.main(Main.java:38)
> "VM Thread" prio=10 tid=0x0817f2a8 nid=0x4 runnable 
> "GC task thread#0 (ParallelGC)" prio=10 tid=0x080f6678 nid=0x2 runnable 
> "GC task thread#1 (ParallelGC)" prio=10 tid=0x080f70b8 nid=0x3 runnable 
> "VM Periodic Task Thread" prio=10 tid=0x080edd70 nid=0xc waiting on condition 
> Full thread dump Java HotSpot(TM) Server VM (1.5.0_14-b03 mixed mode):
> "DnsSelect" daemon prio=10 tid=0x08388b70 nid=0x14 runnable [0xb36be000..0xb36bed38]
> 	at sun.nio.ch.DevPollArrayWrapper.poll0(Native Method)
> 	at sun.nio.ch.DevPollArrayWrapper.poll(DevPollArrayWrapper.java:164)
> 	at sun.nio.ch.DevPollSelectorImpl.doSelect(DevPollSelectorImpl.java:68)
> 	at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
> 	- locked <0xf3494f30> (a sun.nio.ch.Util$1)
> 	- locked <0xf3494f20> (a java.util.Collections$UnmodifiableSet)
> 	- locked <0xf3494cf8> (a sun.nio.ch.DevPollSelectorImpl)
> 	at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
> 	at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:84)
> 	at uk.nominet.dnsjnio.DnsController.selectLoop(Unknown Source)
> 	at uk.nominet.dnsjnio.DnsController.access$000(Unknown Source)
> 	at uk.nominet.dnsjnio.DnsController$1.run(Unknown Source)
> "DnsTimer" daemon prio=10 tid=0x08362d88 nid=0x13 waiting on condition [0xb3738000..0xb3738cb8]
> 	at java.lang.Thread.sleep(Native Method)
> 	at uk.nominet.dnsjnio.Timer$1.run(Unknown Source)
> "LookupAsynchResolver" prio=10 tid=0x08372c38 nid=0x12 in Object.wait() [0xb3779000..0xb3779c38]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xf3496578> (a uk.nominet.dnsjnio.ResponseQueue)
> 	at java.lang.Object.wait(Object.java:474)
> 	at uk.nominet.dnsjnio.ResponseQueue.getItem(Unknown Source)
> 	- locked <0xf3496578> (a uk.nominet.dnsjnio.ResponseQueue)
> 	at org.xbill.DNS.LookupAsynch$ProcessingTask.run(Unknown Source)
> 	- locked <0xf3496578> (a uk.nominet.dnsjnio.ResponseQueue)
> 	at java.lang.Thread.run(Thread.java:595)
> "SPFExecutor" daemon prio=10 tid=0x0855bba0 nid=0x11 in Object.wait() [0xb37ba000..0xb37babb8]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xf3495d18> (a org.apache.james.jspf.executor.StagedMultipleSPFExecutor$ResponseQueueImpl)
> 	at java.lang.Object.wait(Object.java:474)
> 	at org.apache.james.jspf.executor.StagedMultipleSPFExecutor$ResponseQueueImpl.removeResponse(StagedMultipleSPFExecutor.java:64)
> 	- locked <0xf3495d18> (a org.apache.james.jspf.executor.StagedMultipleSPFExecutor$ResponseQueueImpl)
> 	at org.apache.james.jspf.executor.StagedMultipleSPFExecutor.run(StagedMultipleSPFExecutor.java:175)
> 	at java.lang.Thread.run(Thread.java:595)
> "EnbrResolutionThread" prio=10 tid=0x0855b6f0 nid=0x10 in Object.wait() [0xb37fb000..0xb37fbb38]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xf3495948> (a uk.nominet.dnsjnio.ResponseQueue)
> 	at java.lang.Object.wait(Object.java:474)
> 	at uk.nominet.dnsjnio.ResponseQueue.getItem(Unknown Source)
> 	- locked <0xf3495948> (a uk.nominet.dnsjnio.ResponseQueue)
> 	at org.xbill.DNS.ExtendedNonblockingResolver$ResolutionThread.run(Unknown Source)
> "EnbrResolutionThread" prio=10 tid=0x08462f60 nid=0xf in Object.wait() [0xb383c000..0xb383cab8]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xf3496520> (a uk.nominet.dnsjnio.ResponseQueue)
> 	at java.lang.Object.wait(Object.java:474)
> 	at uk.nominet.dnsjnio.ResponseQueue.getItem(Unknown Source)
> 	- locked <0xf3496520> (a uk.nominet.dnsjnio.ResponseQueue)
> 	at org.xbill.DNS.ExtendedNonblockingResolver$ResolutionThread.run(Unknown Source)
> "Thread-1" daemon prio=10 tid=0x084627d0 nid=0xe runnable [0xb387d000..0xb387da38]
> 	at java.net.PlainDatagramSocketImpl.receive0(Native Method)
> 	- locked <0xf3497480> (a java.net.PlainDatagramSocketImpl)
> 	at java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:136)
> 	- locked <0xf3497480> (a java.net.PlainDatagramSocketImpl)
> 	at java.net.DatagramSocket.receive(DatagramSocket.java:712)
> 	- locked <0xf34974c0> (a java.net.DatagramPacket)
> 	- locked <0xf34974e0> (a java.net.DatagramSocket)
> 	at org.apache.james.jspf.dnsserver.UDPListener.run(UDPListener.java:130)
> 	at java.lang.Thread.run(Thread.java:595)
> "Thread-0" daemon prio=10 tid=0x083ec700 nid=0xd runnable [0xb38be000..0xb38bedb8]
> 	at java.net.PlainSocketImpl.socketAccept(Native Method)
> 	at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
> 	- locked <0xf3497530> (a java.net.SocksSocketImpl)
> 	at java.net.ServerSocket.implAccept(ServerSocket.java:450)
> 	at java.net.ServerSocket.accept(ServerSocket.java:421)
> 	at org.apache.james.jspf.dnsserver.TCPListener.run(TCPListener.java:128)
> 	at java.lang.Thread.run(Thread.java:595)
> "Low Memory Detector" daemon prio=10 tid=0x08191d58 nid=0xb runnable [0x00000000..0x00000000]
> "CompilerThread1" daemon prio=10 tid=0x081904e0 nid=0xa waiting on condition [0x00000000..0xf8077fc0]
> "CompilerThread0" daemon prio=10 tid=0x0818f6b0 nid=0x9 waiting on condition [0x00000000..0xf80b8f48]
> "AdapterThread" daemon prio=10 tid=0x0818e880 nid=0x8 waiting on condition [0x00000000..0x00000000]
> "Signal Dispatcher" daemon prio=10 tid=0x0818dab8 nid=0x7 waiting on condition [0x00000000..0x00000000]
> "Finalizer" daemon prio=10 tid=0x08182530 nid=0x6 in Object.wait() [0xf817c000..0xf817ca38]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xf3497978> (a java.lang.ref.ReferenceQueue$Lock)
> 	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:120)
> 	- locked <0xf3497978> (a java.lang.ref.ReferenceQueue$Lock)
> 	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:136)
> 	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
> "Reference Handler" daemon prio=10 tid=0x08181030 nid=0x5 in Object.wait() [0xf81bd000..0xf81bddb8]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xf34841a8> (a java.lang.ref.Reference$Lock)
> 	at java.lang.Object.wait(Object.java:474)
> 	at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
> 	- locked <0xf34841a8> (a java.lang.ref.Reference$Lock)
> "main" prio=10 tid=0x080745c0 nid=0x1 in Object.wait() [0x08046000..0x08046eb0]
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0xf3496270> (a org.apache.james.jspf.executor.FutureSPFResult)
> 	at java.lang.Object.wait(Object.java:474)
> 	at org.apache.james.jspf.executor.FutureSPFResult.checkReady(FutureSPFResult.java:56)
> 	- locked <0xf3496270> (a org.apache.james.jspf.executor.FutureSPFResult)
> 	at org.apache.james.jspf.executor.FutureSPFResult.getResult(FutureSPFResult.java:99)
> 	at org.apache.james.jspf.AbstractYamlTest.verifyResult(AbstractYamlTest.java:296)
> 	at org.apache.james.jspf.AbstractYamlTest.runTest(AbstractYamlTest.java:264)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213)
> 	at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
> 	at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
> 	at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:585)
> 	at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:334)
> 	at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:980)
> "VM Thread" prio=10 tid=0x0817ef58 nid=0x4 runnable 
> "GC task thread#0 (ParallelGC)" prio=10 tid=0x080f6318 nid=0x2 runnable 
> "GC task thread#1 (ParallelGC)" prio=10 tid=0x080f6d58 nid=0x3 runnable 
> "VM Periodic Task Thread" prio=10 tid=0x080eda10 nid=0xc waiting on condition 

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