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nacos leads to high CPU usage #1605

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hyw520110 opened this issue Jul 25, 2019 · 4 comments
Closed

nacos leads to high CPU usage #1605

hyw520110 opened this issue Jul 25, 2019 · 4 comments
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@chuntaojun

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@hyw520110
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hyw520110 commented Jul 25, 2019 •
edited
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version:

<dubbo.version>2.7.1</dubbo.version>
<spring-boot.version>2.1.3.RELEASE</spring-boot.version>
<spring-cloud-commons.version>2.1.1.RELEASE</spring-cloud-commons.version>
<spring-cloud-alibaba.version>0.9.1.BUILD-SNAPSHOT</spring-cloud-alibaba.version>

dependency:

    <dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
	</dependency>
	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
	</dependency>
	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-dubbo</artifactId>
	</dependency>

or

           <dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
	</dependency>
	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
	</dependency>
          <dependency>
		<groupId>com.alibaba.spring.boot</groupId>
		<artifactId>dubbo-spring-boot-starter</artifactId>
		<version>2.0.0</version>
	</dependency>`

thread log:

image

Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.211-b12 mixed mode):

"Attach Listener" #8166 daemon prio=9 os_prio=0 tid=0x00007fb1e8028800 nid=0x4bb2 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE

"Keep-Alive-Timer" #8165 daemon prio=8 os_prio=0 tid=0x00007fb1f006d000 nid=0x4ba4 waiting on condition [0x00007fb1bc0d5000]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at sun.net.www.http.KeepAliveCache.run(KeepAliveCache.java:172)
at java.lang.Thread.run(Thread.java:748)

"DestroyJavaVM" #98 prio=5 os_prio=0 tid=0x00007fb2103b2800 nid=0x5a2 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE

"com.alibaba.nacos.client.Worker.longPollingfixed-127.0.0.1_8848" #78 daemon prio=5 os_prio=0 tid=0x00007fb1c8006000 nid=0x6b8 runnable [0x00007fb1bbdd3000]
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:171)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
- locked <0x00000000d6c001d8> (a java.io.BufferedInputStream)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:735)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:678)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1587)
- locked <0x00000000d6bfbea0> (a sun.net.www.protocol.http.HttpURLConnection)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
- locked <0x00000000d6bfbea0> (a sun.net.www.protocol.http.HttpURLConnection)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at com.alibaba.nacos.client.config.impl.HttpSimpleClient.httpPost(HttpSimpleClient.java:123)
at com.alibaba.nacos.client.config.http.ServerHttpAgent.httpPost(ServerHttpAgent.java:115)
at com.alibaba.nacos.client.config.http.MetricsHttpAgent.httpPost(MetricsHttpAgent.java:64)
at com.alibaba.nacos.client.config.impl.ClientWorker.checkUpdateConfigStr(ClientWorker.java:361)
at com.alibaba.nacos.client.config.impl.ClientWorker.checkUpdateDataIds(ClientWorker.java:335)
at com.alibaba.nacos.client.config.impl.ClientWorker$LongPollingRunnable.run(ClientWorker.java:478)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"NacosConfigListener-ThreadPool-1" #77 daemon prio=5 os_prio=0 tid=0x00007fb1c8005000 nid=0x6b7 waiting on condition [0x00007fb1d339e000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000089cad3c0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.push.receiver" #45 daemon prio=5 os_prio=0 tid=0x00007fb1c5f27800 nid=0x681 runnable [0x00007fb1bddf2000]
java.lang.Thread.State: RUNNABLE
at java.net.PlainDatagramSocketImpl.receive0(Native Method)
- locked <0x0000000089fe37f8> (a java.net.PlainDatagramSocketImpl)
at java.net.AbstractPlainDatagramSocketImpl.receive(AbstractPlainDatagramSocketImpl.java:143)
- locked <0x0000000089fe37f8> (a java.net.PlainDatagramSocketImpl)
at java.net.DatagramSocket.receive(DatagramSocket.java:812)
- locked <0x000000008a3311b8> (a java.net.DatagramPacket)
- locked <0x0000000089fe37b8> (a java.net.DatagramSocket)
at com.alibaba.nacos.client.naming.core.PushReceiver.run(PushReceiver.java:73)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.failover" #44 daemon prio=5 os_prio=0 tid=0x00007fb1c5f24000 nid=0x680 waiting on condition [0x00007fb1bdef3000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000089fe47f0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.beat.sender" #43 daemon prio=5 os_prio=0 tid=0x00007fb1c5f22800 nid=0x67f waiting on condition [0x00007fb1bdff4000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000089fe51a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.client.listener" #42 daemon prio=5 os_prio=0 tid=0x00007fb1c5f21800 nid=0x67e waiting on condition [0x00007fb1be0f5000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000089fe3df0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:467)
at com.alibaba.nacos.client.naming.core.EventDispatcher$Notifier.run(EventDispatcher.java:114)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.client.naming.updater" #41 daemon prio=5 os_prio=0 tid=0x00007fb1c5ea4800 nid=0x67d waiting on condition [0x00007fb1be1f6000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x000000008a01de60> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"DubboRegistryRetryTimer-thread-1" #40 daemon prio=5 os_prio=0 tid=0x00007fb1c5e9c000 nid=0x67c waiting on condition [0x00007fb1be2f7000]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at org.apache.dubbo.common.timer.HashedWheelTimer$Worker.waitForNextTick(HashedWheelTimer.java:539)
at org.apache.dubbo.common.timer.HashedWheelTimer$Worker.run(HashedWheelTimer.java:442)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.push.receiver" #39 daemon prio=5 os_prio=0 tid=0x00007fb1c5e81000 nid=0x67b waiting on condition [0x00007fb1be5f8000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000089fe7ce8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1081)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.failover" #38 daemon prio=5 os_prio=0 tid=0x00007fb1c5e77000 nid=0x67a waiting on condition [0x00007fb1be6f9000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x000000008a01db70> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.beat.sender" #37 daemon prio=5 os_prio=0 tid=0x00007fb1c5e76000 nid=0x679 waiting on condition [0x00007fb1be7fa000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x000000008a01bae0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.client.listener" #36 daemon prio=5 os_prio=0 tid=0x00007fb1c5e7d000 nid=0x678 waiting on condition [0x00007fb1be8fb000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000089fe8c08> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:467)
at com.alibaba.nacos.client.naming.core.EventDispatcher$Notifier.run(EventDispatcher.java:114)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.client.Worker.longPollingfixed-127.0.0.1_8848" #33 daemon prio=5 os_prio=0 tid=0x00007fb1c027e800 nid=0x677 waiting on condition [0x00007fb1beffc000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000089984150> (a java.util.concurrent.SynchronousQueue$TransferStack)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.client.Worker.fixed-127.0.0.1_8848" #32 daemon prio=5 os_prio=0 tid=0x00007fb1c5d67800 nid=0x676 waiting on condition [0x00007fb1bf0fd000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000089984a58> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"Timer-1" #31 daemon prio=5 os_prio=0 tid=0x00007fb1c5d65800 nid=0x675 in Object.wait() [0x00007fb1bf1fe000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.util.TimerThread.mainLoop(Timer.java:552)
- locked <0x0000000089cadcc0> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:505)

"com.alibaba.nacos.naming.push.receiver" #27 daemon prio=5 os_prio=0 tid=0x00007fb1c5416000 nid=0x664 runnable [0x00007fb1d084d000]
java.lang.Thread.State: RUNNABLE
at java.net.PlainDatagramSocketImpl.receive0(Native Method)
- locked <0x0000000084a90d50> (a java.net.PlainDatagramSocketImpl)
at java.net.AbstractPlainDatagramSocketImpl.receive(AbstractPlainDatagramSocketImpl.java:143)
- locked <0x0000000084a90d50> (a java.net.PlainDatagramSocketImpl)
at java.net.DatagramSocket.receive(DatagramSocket.java:812)
- locked <0x0000000084bdfd80> (a java.net.DatagramPacket)
- locked <0x0000000084a90d10> (a java.net.DatagramSocket)
at com.alibaba.nacos.client.naming.core.PushReceiver.run(PushReceiver.java:73)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.failover" #26 daemon prio=5 os_prio=0 tid=0x00007fb1c5411800 nid=0x663 waiting on condition [0x00007fb1d094e000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000084a91e10> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.beat.sender" #25 daemon prio=5 os_prio=0 tid=0x00007fb1c5410000 nid=0x662 waiting on condition [0x00007fb1d0a4f000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000084a929f8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.naming.client.listener" #24 daemon prio=5 os_prio=0 tid=0x00007fb1c5402800 nid=0x661 waiting on condition [0x00007fb1d25ec000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000084a913c0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:467)
at com.alibaba.nacos.client.naming.core.EventDispatcher$Notifier.run(EventDispatcher.java:114)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"com.alibaba.nacos.client.Worker.fixed-127.0.0.1_8848-417071d1-b6f5-448b-b2de-56ff4981f9cd" #22 daemon prio=5 os_prio=0 tid=0x00007fb1c4f3c000 nid=0x5f3 waiting on condition [0x00007fb1d1750000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000000842ebbb0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"Timer-0" #21 daemon prio=5 os_prio=0 tid=0x00007fb1c4f37000 nid=0x5f2 in Object.wait() [0x00007fb1d1851000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.util.TimerThread.mainLoop(Timer.java:552)
- locked <0x00000000842ec1e0> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:505)

"pool-2-thread-1" #18 prio=5 os_prio=0 tid=0x00007fb1c4eea800 nid=0x5ef waiting on condition [0x00007fb1d28ed000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x0000000083c08690> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
at org.apache.dubbo.spring.boot.context.event.AwaitingNonWebApplicationListener.lambda$null$0(AwaitingNonWebApplicationListener.java:143)
at org.apache.dubbo.spring.boot.context.event.AwaitingNonWebApplicationListener$$Lambda$234/2071517916.run(Unknown Source)
at org.apache.dubbo.spring.boot.context.event.AwaitingNonWebApplicationListener.executeMutually(AwaitingNonWebApplicationListener.java:172)
at org.apache.dubbo.spring.boot.context.event.AwaitingNonWebApplicationListener.lambda$await$1(AwaitingNonWebApplicationListener.java:137)
at org.apache.dubbo.spring.boot.context.event.AwaitingNonWebApplicationListener$$Lambda$233/339665988.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

"GC Daemon" #11 daemon prio=2 os_prio=0 tid=0x00007fb21044b800 nid=0x5be in Object.wait() [0x00007fb1f819e000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000837a6fe8> (a sun.misc.GC$LatencyLock)
at sun.misc.GC$Daemon.run(GC.java:117)
- locked <0x00000000837a6fe8> (a sun.misc.GC$LatencyLock)

"AsyncFileHandlerWriter-1259475182" #10 daemon prio=5 os_prio=0 tid=0x00007fb210182000 nid=0x5b5 waiting on condition [0x00007fb2001f6000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x000000008392d190> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.LinkedBlockingDeque.pollFirst(LinkedBlockingDeque.java:522)
at java.util.concurrent.LinkedBlockingDeque.poll(LinkedBlockingDeque.java:684)
at org.apache.juli.AsyncFileHandler$LoggerThread.run(AsyncFileHandler.java:160)

"Service Thread" #7 daemon prio=9 os_prio=0 tid=0x00007fb2100c3800 nid=0x5af runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE

"C1 CompilerThread1" #6 daemon prio=9 os_prio=0 tid=0x00007fb2100b8800 nid=0x5ae waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE

"C2 CompilerThread0" #5 daemon prio=9 os_prio=0 tid=0x00007fb2100b5800 nid=0x5ad waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" #4 daemon prio=9 os_prio=0 tid=0x00007fb2100b4000 nid=0x5ac runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE

"Finalizer" #3 daemon prio=8 os_prio=0 tid=0x00007fb210081000 nid=0x5ab in Object.wait() [0x00007fb200efd000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
- locked <0x00000000838f9b68> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:216)

"Reference Handler" #2 daemon prio=10 os_prio=0 tid=0x00007fb21007e800 nid=0x5aa in Object.wait() [0x00007fb200ffe000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:502)
at java.lang.ref.Reference.tryHandlePending(Reference.java:191)
- locked <0x0000000083565c78> (a java.lang.ref.Reference$Lock)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)

"VM Thread" os_prio=0 tid=0x00007fb210075000 nid=0x5a9 runnable

"GC task thread#0 (ParallelGC)" os_prio=0 tid=0x00007fb210020800 nid=0x5a3 runnable

"GC task thread#1 (ParallelGC)" os_prio=0 tid=0x00007fb210022000 nid=0x5a4 runnable

"VM Periodic Task Thread" os_prio=0 tid=0x00007fb2100c6000 nid=0x5b0 waiting on condition

JNI global references: 1200
@kathetina
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dubbo 是 2.7.1 ，请问nacos是哪个版本？

@hyw520110
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nacos server 1.0.0

@chuntaojun chuntaojun self-assigned this Sep 5, 2019
@chuntaojun
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alibaba/spring-cloud-alibaba#859

@chuntaojun
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分析文章：https://www.liaochuntao.cn/2019/09/04/java-web-53/

@airship-lion airship-lion mentioned this issue May 18, 2021
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