在使用akka框架应用程序的Java play中解决性能问题。基本上消耗和处理来自队列的消息。并在处理每条消息时大量使用外部服务API。 我在某种情况下遇到CPU负载问题，试图找到根本原因。这是CPU~100％时主机之一的线程转储。
我看到许多被阻止的线程与sun.misc.Unsafe.park并没有看到任何应用程序代码的信息。这些被阻止的人在等待IO吗？你能提一些提示吗？ 感谢
1032 BLOCKED
threads
Thread 34542 - threadId:Thread 34542 - state:BLOCKED
stackTrace:
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may be imprecise)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=226 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2082 (Compiled frame)
- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take() @bci=122, line=1090 (Compiled frame)
- java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take() @bci=1, line=807 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor.getTask() @bci=156, line=1068 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) @bci=26, line=1130 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5, line=615 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=745 (Interpreted frame)
362 BLOCKED
threads
Thread 77117 - threadId:Thread 77117 - state:BLOCKED
stackTrace:
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may be imprecise)
- java.util.concurrent.locks.LockSupport.park(java.lang.Object) @bci=14, line=186 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await() @bci=42, line=2043 (Compiled frame)
- java.util.concurrent.LinkedBlockingQueue.take() @bci=29, line=442 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor.getTask() @bci=156, line=1068 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) @bci=26, line=1130 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5, line=615 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=745 (Interpreted frame)
269 BLOCKED
threads
Thread 37702 - threadId:Thread 37702 - state:BLOCKED
stackTrace:
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may be imprecise)
- scala.concurrent.forkjoin.ForkJoinPool.scan(scala.concurrent.forkjoin.ForkJoinPool$WorkQueue) @bci=525, line=2075 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool.runWorker(scala.concurrent.forkjoin.ForkJoinPool$WorkQueue) @bci=8, line=1979 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinWorkerThread.run() @bci=14, line=107 (Interpreted frame)
66 BLOCKED
threads
Thread 33338 - threadId:Thread 33338 - state:BLOCKED
stackTrace:
- java.io.ExpiringCache.get(java.lang.String) @bci=0, line=74 (Compiled frame)
- java.io.UnixFileSystem.canonicalize(java.lang.String) @bci=17, line=152 (Compiled frame)
- java.io.File.getCanonicalPath() @bci=27, line=618 (Compiled frame)
- com.azr.rocketman.render.helper.EmailconfigTemplateMethodModel.<init>(java.lang.String) @bci=27, line=50 (Compiled frame)
- sun.reflect.GeneratedConstructorAccessor84.newInstance(java.lang.Object[]) @bci=28 (Compiled frame)
- sun.reflect.DelegatingConstructorAccessorImpl.newInstance(java.lang.Object[]) @bci=5, line=45 (Compiled frame)
- java.lang.reflect.Constructor.newInstance(java.lang.Object[]) @bci=79, line=526 (Compiled frame)
- freemarker.ext.beans.BeansWrapper.newInstance(java.lang.Class, java.util.List) @bci=144, line=994 (Compiled frame)
- freemarker.core.NewBI$ConstructorFunction.exec(java.util.List) @bci=32, line=116 (Compiled frame)
- freemarker.core.MethodCall._eval(freemarker.core.Environment) @bci=52, line=98 (Compiled frame)
…
- freemarker.core.Environment.visit(freemarker.core.TemplateElement) @bci=7, line=265 (Compiled frame)
- freemarker.core.Environment.process() @bci=31, line=243 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.render(java.lang.String, freemarker.template.Configuration, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=165, line=101 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=7, line=60 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=4, line=30 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.renderHtmlBody(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext, com.azr.push.renderer.data.TemplateData) @bci=23, line=146 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext) @bci=61, line=109 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=5, line=63 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=31, line=21 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderAndSendPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=2, line=20 (Compiled frame)
- com.azr.push.assembler.AbstractDataAssembler.assemble(com.azr.push.pojo.wrapper.UserPayload) @bci=27, line=72 (Compiled frame)
- com.azr.push.assembler.AssemblerActor.onReceive(java.lang.Object) @bci=39, line=30 (Compiled frame)
- akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(java.lang.Object, scala.Function1) @bci=7, line=167 (Compiled frame)
- akka.actor.ActorCell.receiveMessage(java.lang.Object) @bci=25, line=498 (Compiled frame)
- akka.actor.ActorCell.invoke(akka.dispatch.Envelope) @bci=39, line=456 (Compiled frame)
- akka.dispatch.Mailbox.processMailbox(int, long) @bci=24, line=237 (Compiled frame)
- akka.dispatch.Mailbox.run() @bci=20, line=219 (Compiled frame)
- akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec() @bci=4, line=385 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinTask.doExec() @bci=10, line=260 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(scala.concurrent.forkjoin.ForkJoinTask) @bci=10, line=1339 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool.runWorker(scala.concurrent.forkjoin.ForkJoinPool$WorkQueue) @bci=11, line=1979 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinWorkerThread.run() @bci=14, line=107 (Interpreted frame)
64 BLOCKED
threads
Thread 33194 - threadId:Thread 33194 - state:BLOCKED
stackTrace:
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may be imprecise)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=226 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2082 (Compiled frame)
- java.util.concurrent.LinkedBlockingQueue.poll(long, java.util.concurrent.TimeUnit) @bci=62, line=467 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor.getTask() @bci=141, line=1068 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) @bci=26, line=1130 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5, line=615 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=745 (Interpreted frame)
63 BLOCKED
threads
Thread 63135 - threadId:Thread 63135 - state:BLOCKED
stackTrace:
- sun.nio.ch.EPollArrayWrapper.epollWait(long, int, long, int) @bci=0 (Compiled frame; information may be imprecise)
- sun.nio.ch.EPollArrayWrapper.poll(long) @bci=18, line=269 (Compiled frame)
- sun.nio.ch.EPollSelectorImpl.doSelect(long) @bci=28, line=79 (Compiled frame)
- sun.nio.ch.SelectorImpl.lockAndDoSelect(long) @bci=37, line=87 (Compiled frame)
- sun.nio.ch.SelectorImpl.select(long) @bci=30, line=98 (Compiled frame)
- org.jboss.netty.channel.socket.nio.SelectorUtil.select(java.nio.channels.Selector) @bci=4, line=68 (Compiled frame)
- org.jboss.netty.channel.socket.nio.AbstractNioSelector.select(java.nio.channels.Selector) @bci=1, line=409 (Compiled frame)
- org.jboss.netty.channel.socket.nio.AbstractNioSelector.run() @bci=49, line=206 (Compiled frame)
- org.jboss.netty.channel.socket.nio.AbstractNioWorker.run() @bci=1, line=90 (Interpreted frame)
- org.jboss.netty.channel.socket.nio.NioWorker.run() @bci=1, line=178 (Interpreted frame)
- org.jboss.netty.util.ThreadRenamingRunnable.run() @bci=55, line=108 (Interpreted frame)
- org.jboss.netty.util.internal.DeadLockProofWorker$1.run() @bci=14, line=42 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) @bci=95, line=1145 (Interpreted frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5, line=615 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=745 (Interpreted frame)
34 blocked threads
Thread 33336 - threadId:Thread 33336 - state:BLOCKED
stackTrace:
…
- com.azr.push.renderer.processor.FreeMarkerRenderer.render(java.lang.String, freemarker.template.Configuration, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=165, line=101 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=7, line=60 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=4, line=30 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.renderHtmlBody(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext, com.azr.push.renderer.data.TemplateData) @bci=23, line=146 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext) @bci=61, line=109 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=5, line=63 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=31, line=21 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderAndSendPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=2, line=20 (Compiled frame)
- com.azr.push.assembler.AbstractDataAssembler.assemble(com.azr.push.pojo.wrapper.UserPayload) @bci=27, line=72 (Compiled frame)
- com.azr.push.assembler.AssemblerActor.onReceive(java.lang.Object) @bci=39, line=30 (Compiled frame)
- akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(java.lang.Object, scala.Function1) @bci=7, line=167 (Compiled frame)
- akka.actor.ActorCell.receiveMessage(java.lang.Object) @bci=25, line=498 (Compiled frame)
- akka.actor.ActorCell.invoke(akka.dispatch.Envelope) @bci=39, line=456 (Compiled frame)
- akka.dispatch.Mailbox.processMailbox(int, long) @bci=24, line=237 (Compiled frame)
- akka.dispatch.Mailbox.run() @bci=20, line=219 (Compiled frame)
- akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec() @bci=4, line=385 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinTask.doExec() @bci=10, line=260 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(scala.concurrent.forkjoin.ForkJoinTask) @bci=10, line=1339 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool.runWorker(scala.concurrent.forkjoin.ForkJoinPool$WorkQueue) @bci=11, line=1979 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinWorkerThread.run() @bci=14, line=107 (Interpreted frame)
26 blocked threads
Thread 33327 - threadId:Thread 33327 - state:BLOCKED
stackTrace:
- freemarker.core._RegexBuiltins.getPattern(java.lang.String, int) @bci=16, line=122 (Compiled frame)
…
- freemarker.core.Environment.process() @bci=31, line=243 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.render(java.lang.String, freemarker.template.Configuration, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=165, line=101 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=7, line=60 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=4, line=30 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.renderHtmlBody(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext, com.azr.push.renderer.data.TemplateData) @bci=23, line=146 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext) @bci=61, line=109 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=5, line=63 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=31, line=21 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderAndSendPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=2, line=20 (Compiled frame)
- com.azr.push.assembler.AbstractDataAssembler.assemble(com.azr.push.pojo.wrapper.UserPayload) @bci=27, line=72 (Compiled frame)
- com.azr.push.assembler.AssemblerActor.onReceive(java.lang.Object) @bci=39, line=30 (Compiled frame)
- akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(java.lang.Object, scala.Function1) @bci=7, line=167 (Compiled frame)
- akka.actor.ActorCell.receiveMessage(java.lang.Object) @bci=25, line=498 (Compiled frame)
- akka.actor.ActorCell.invoke(akka.dispatch.Envelope) @bci=39, line=456 (Compiled frame)
- akka.dispatch.Mailbox.processMailbox(int, long) @bci=24, line=237 (Compiled frame)
- akka.dispatch.Mailbox.run() @bci=20, line=219 (Compiled frame)
- akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec() @bci=4, line=385 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinTask.doExec() @bci=10, line=260 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(scala.concurrent.forkjoin.ForkJoinTask) @bci=10, line=1339 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool.runWorker(scala.concurrent.forkjoin.ForkJoinPool$WorkQueue) @bci=11, line=1979 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinWorkerThread.run() @bci=14, line=107 (Interpreted frame)
26 blocked thread
Thread 33333 - threadId:Thread 33333 - state:BLOCKED
stackTrace:
- freemarker.core._RegexBuiltins.getPattern(java.lang.String, int) @bci=16, line=122 (Compiled frame)
..
- com.azr.push.renderer.processor.FreeMarkerRenderer.render(java.lang.String, freemarker.template.Configuration, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=165, line=101 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=7, line=60 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=4, line=30 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.renderHtmlBody(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext, com.azr.push.renderer.data.TemplateData) @bci=23, line=146 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext) @bci=61, line=109 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=5, line=63 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=31, line=21 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderAndSendPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=2, line=20 (Compiled frame)
- com.azr.push.assembler.AbstractDataAssembler.assemble(com.azr.push.pojo.wrapper.UserPayload) @bci=27, line=72 (Compiled frame)
- com.azr.push.assembler.AssemblerActor.onReceive(java.lang.Object) @bci=39, line=30 (Compiled frame)
- akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(java.lang.Object, scala.Function1) @bci=7, line=167 (Compiled frame)
- akka.actor.ActorCell.receiveMessage(java.lang.Object) @bci=25, line=498 (Compiled frame)
- akka.actor.ActorCell.invoke(akka.dispatch.Envelope) @bci=39, line=456 (Compiled frame)
- akka.dispatch.Mailbox.processMailbox(int, long) @bci=24, line=237 (Compiled frame)
- akka.dispatch.Mailbox.run() @bci=20, line=219 (Compiled frame)
- akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec() @bci=4, line=385 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinTask.doExec() @bci=10, line=260 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(scala.concurrent.forkjoin.ForkJoinTask) @bci=10, line=1339 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool.runWorker(scala.concurrent.forkjoin.ForkJoinPool$WorkQueue) @bci=11, line=1979 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinWorkerThread.run() @bci=14, line=107 (Interpreted frame)
25 blocked threads
Thread 33323 - threadId:Thread 33323 - state:BLOCKED
stackTrace:
- freemarker.core._RegexBuiltins.getPattern(java.lang.String, int) @bci=16, line=122 (Compiled frame)
…
- freemarker.core.Environment.visit(freemarker.core.TemplateElement) @bci=7, line=265 (Compiled frame)
- freemarker.core.Environment.process() @bci=31, line=243 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.render(java.lang.String, freemarker.template.Configuration, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=165, line=101 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=7, line=60 (Compiled frame)
- com.azr.push.renderer.processor.FreeMarkerRenderer.renderFromPath(java.lang.String, com.azr.push.renderer.data.TemplateData, com.azr.push.error.MessageError) @bci=4, line=30 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.renderHtmlBody(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext, com.azr.push.renderer.data.TemplateData) @bci=23, line=146 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendEmailContext) @bci=61, line=109 (Compiled frame)
- com.azr.push.pipeline.rendersend.component.email.RenderEmailComponent.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=5, line=63 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=31, line=21 (Compiled frame)
- com.azr.push.pipeline.rendersend.RenderAndSendPipeline.process(com.azr.push.pipeline.rendersend.context.RenderAndSendContext) @bci=2, line=20 (Compiled frame)
- com.azr.push.assembler.AbstractDataAssembler.assemble(com.azr.push.pojo.wrapper.UserPayload) @bci=27, line=72 (Compiled frame)
- com.azr.push.assembler.AssemblerActor.onReceive(java.lang.Object) @bci=39, line=30 (Compiled frame)
- akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(java.lang.Object, scala.Function1) @bci=7, line=167 (Compiled frame)
- akka.actor.ActorCell.receiveMessage(java.lang.Object) @bci=25, line=498 (Compiled frame)
- akka.actor.ActorCell.invoke(akka.dispatch.Envelope) @bci=39, line=456 (Compiled frame)
- akka.dispatch.Mailbox.processMailbox(int, long) @bci=24, line=237 (Compiled frame)
- akka.dispatch.Mailbox.run() @bci=20, line=219 (Compiled frame)
- akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec() @bci=4, line=385 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinTask.doExec() @bci=10, line=260 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(scala.concurrent.forkjoin.ForkJoinTask) @bci=10, line=1339 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinPool.runWorker(scala.concurrent.forkjoin.ForkJoinPool$WorkQueue) @bci=11, line=1979 (Compiled frame)
- scala.concurrent.forkjoin.ForkJoinWorkerThread.run() @bci=14, line=107 (Interpreted frame)
答案 0 :(得分：1)
sun.misc.Unsafe.park(...)基本上与Thread.wait类似，但它使用的是os代码，因此不会向我们公开。
您可以在堆栈跟踪中看到停放的线程来自与阻塞队列相关的线程池。被停放的线程＆＃34;来自池的只是等待分配任务。此外，他们真的消耗0％的CPU，所以我怀疑这是你的问题。
虽然你有一个死锁或并发问题可能会让你的队列永远阻塞它......
此外，其中唯一提及I / O的线程是ID为63135的线程。