什么是Thread Dump

Thread Dump是非常有用的诊断Java应用问题的工具。每一个Java虚拟机都有及时生成所有线程在某一点状态的thread-dump的能力，虽然各个 Java虚拟机打印的thread dump略有不同，但是大多都提供了当前活动线程的快照，及JVM中所有Java线程的堆栈跟踪信息，堆栈信息一般包含完整的类名及所执行的方法，如果可能的话还有源代码的行数。

Thread Dump特点

  1. 能在各种操作系统下使用
  2. 能在各种Java应用服务器下使用
  3. 可以在生产环境下使用而不影响系统的性能
  4. 可以将问题直接定位到应用程序的代码行上

Thread Dump 能诊断的问题

  1. 查找内存泄露，常见的是程序里load大量的数据到缓存；
  2. 发现死锁线程；

Thread Dump最常用的两种方式

Thread dumps 能帮助我们判断 CPU 峰值、死锁、内存异常、应用反应迟钝、响应时间变长和其他系统问题。一些在线的分析工具比如 http://fastthread.io/ 也能帮助我们分析和定位问题，但是这些工具都要求有一个 dump 文件。
Dump 文件有很多种方式可以获取到，由于笔者经常是linux上开发或者运行程序，所以介绍两种最常用的方式。

jstack

jstack 是一个抓取 thread dump 文件的有效的命令行工具，它位于 JDK 目录里的 bin 文件夹下（JDK_HOME\bin），以下是抓取 dump 文件的命令：
jstack -l <pid> > <file-path>
说明：
pid： Java 应用的进程 id ,也就是需要抓取 dump 文件的应用进程 id。
file-path： 保存 dump 文件的路径。
示例：
jstack -l 37320 > /opt/tmp/threadDump.txt
上面的例子演示了用 jstack 生成 dump 文件到 /opt/tmp/threadDump.txt 目录下。
另外，从 Java5 开始，jstack 被包含进了 jdk 当中，如果你使用老版本的 jdk，要考虑使用其他方式。

Kill -3

处于安全方面的考虑，有一部分生产环境的机器只包含 JRE 环境，因此就不能使用 jstack 工具了，在这种情况下，我们可以使用 kill -3 的方式：

kill -3 <pid>
说明：
pid： Java 应用的进程 id ,也就是需要抓取 dump 文件的应用进程 id 。

示例：
kill -3 37320
当使用 kill -3 生成 dump 文件时，dump 文件会被输出到标准错误流。假如你的应用运行在 tomcat 上，dump 内容将被发送到/logs/catalina.out 文件里。

Dump文件分析

先贴一个Dump文件的内容。

2017-08-20 23:01:03

Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.60-b23 mixed mode):

"Attach Listener" #62 daemon prio=9 os_prio=0 tid=0x00007f762808d800 nid=0x3058 waiting on condition [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:

    - None

"main-EventThread" #61 daemon prio=5 os_prio=0 tid=0x00007f7650971800 nid=0x2bde waiting on condition [0x00007f761dfe2000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000c52104c8> (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 org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:491)

   Locked ownable synchronizers:

    - None

"main-SendThread(zookeeper-cluster3.base:2181)" #60 daemon prio=5 os_prio=0 tid=0x00007f76505d6000 nid=0x2bdd runnable [0x00007f761e0e3000]

   java.lang.Thread.State: RUNNABLE

    at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)

    at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)

    at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)

    at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

    - locked <0x00000000c5210730> (a sun.nio.ch.Util$2)

    - locked <0x00000000c5210740> (a java.util.Collections$UnmodifiableSet)

    - locked <0x00000000c5210750> (a sun.nio.ch.EPollSelectorImpl)

    at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

    at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:338)

    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-AsyncTimeout" #48 daemon prio=5 os_prio=0 tid=0x00007f76504d0800 nid=0x93e waiting on condition [0x00007f761e6e5000]

   java.lang.Thread.State: TIMED_WAITING (sleeping)

    at java.lang.Thread.sleep(Native Method)

    at org.apache.coyote.AbstractProtocol$AsyncTimeout.run(AbstractProtocol.java:1139)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-Acceptor-0" #47 daemon prio=5 os_prio=0 tid=0x00007f7650503800 nid=0x93d runnable [0x00007f761e7e6000]

   java.lang.Thread.State: RUNNABLE

    at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)

    at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)

    at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)

    - locked <0x00000000d8870cb0> (a java.lang.Object)

    at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:417)

    at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:69)

    at org.apache.tomcat.util.net.Acceptor.run(Acceptor.java:95)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-ClientPoller-0" #46 daemon prio=5 os_prio=0 tid=0x00007f7650502000 nid=0x93c runnable [0x00007f761e8e7000]

   java.lang.Thread.State: RUNNABLE

    at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)

    at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)

    at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)

    at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

    - locked <0x00000000d9946e68> (a sun.nio.ch.Util$2)

    - locked <0x00000000d9946e58> (a java.util.Collections$UnmodifiableSet)

    - locked <0x00000000d9946e10> (a sun.nio.ch.EPollSelectorImpl)

    at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

    at org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:702)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-10" #45 daemon prio=5 os_prio=0 tid=0x00007f76504f0800 nid=0x93b waiting on condition [0x00007f761e9e8000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-9" #44 daemon prio=5 os_prio=0 tid=0x00007f76504a5800 nid=0x93a waiting on condition [0x00007f761eae9000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-8" #43 daemon prio=5 os_prio=0 tid=0x00007f765049e000 nid=0x939 waiting on condition [0x00007f761ebea000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-7" #42 daemon prio=5 os_prio=0 tid=0x00007f76504b7800 nid=0x938 waiting on condition [0x00007f761eceb000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-6" #41 daemon prio=5 os_prio=0 tid=0x00007f7650566000 nid=0x937 waiting on condition [0x00007f761edec000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-5" #40 daemon prio=5 os_prio=0 tid=0x00007f76504f7000 nid=0x936 waiting on condition [0x00007f761eeed000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-4" #39 daemon prio=5 os_prio=0 tid=0x00007f765014f000 nid=0x935 waiting on condition [0x00007f761efee000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-3" #38 daemon prio=5 os_prio=0 tid=0x00007f76509e5800 nid=0x934 waiting on condition [0x00007f761f0ef000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-2" #37 daemon prio=5 os_prio=0 tid=0x00007f765107b800 nid=0x933 waiting on condition [0x00007f761f1f0000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ajp-nio-8009-exec-1" #36 daemon prio=5 os_prio=0 tid=0x00007f7650fea800 nid=0x932 waiting on condition [0x00007f761f2f1000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9947028> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-AsyncTimeout" #35 daemon prio=5 os_prio=0 tid=0x00007f7650c69000 nid=0x931 waiting on condition [0x00007f761f3f2000]

   java.lang.Thread.State: TIMED_WAITING (sleeping)

    at java.lang.Thread.sleep(Native Method)

    at org.apache.coyote.AbstractProtocol$AsyncTimeout.run(AbstractProtocol.java:1139)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-Acceptor-0" #34 daemon prio=5 os_prio=0 tid=0x00007f76509d3800 nid=0x930 runnable [0x00007f761f4f3000]

   java.lang.Thread.State: RUNNABLE

    at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)

    at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)

    at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)

    - locked <0x00000000d875ab68> (a java.lang.Object)

    at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:417)

    at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:69)

    at org.apache.tomcat.util.net.Acceptor.run(Acceptor.java:95)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-ClientPoller-0" #33 daemon prio=5 os_prio=0 tid=0x00007f7650556000 nid=0x92f runnable [0x00007f761f5f4000]

   java.lang.Thread.State: RUNNABLE

    at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)

    at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)

    at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)

    at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

    - locked <0x00000000d9948770> (a sun.nio.ch.Util$2)

    - locked <0x00000000d9948760> (a java.util.Collections$UnmodifiableSet)

    - locked <0x00000000d9948718> (a sun.nio.ch.EPollSelectorImpl)

    at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

    at org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:702)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-10" #32 daemon prio=5 os_prio=0 tid=0x00007f76504f3000 nid=0x92e waiting on condition [0x00007f761f6f5000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-9" #31 daemon prio=5 os_prio=0 tid=0x00007f76504e2800 nid=0x92d waiting on condition [0x00007f761f7f6000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-8" #30 daemon prio=5 os_prio=0 tid=0x00007f76504f5800 nid=0x92c waiting on condition [0x00007f761f8f7000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-7" #29 daemon prio=5 os_prio=0 tid=0x00007f76504f5000 nid=0x92b waiting on condition [0x00007f761f9f8000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-6" #28 daemon prio=5 os_prio=0 tid=0x00007f76504e1000 nid=0x92a waiting on condition [0x00007f761faf9000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-5" #27 daemon prio=5 os_prio=0 tid=0x00007f765049b800 nid=0x929 waiting on condition [0x00007f761fbfa000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-4" #26 daemon prio=5 os_prio=0 tid=0x00007f7650498000 nid=0x928 waiting on condition [0x00007f761fcfb000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-3" #25 daemon prio=5 os_prio=0 tid=0x00007f76504d3000 nid=0x927 waiting on condition [0x00007f761fdfc000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-2" #24 daemon prio=5 os_prio=0 tid=0x00007f76504a8000 nid=0x926 waiting on condition [0x00007f761fefd000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"http-nio-8080-exec-1" #23 daemon prio=5 os_prio=0 tid=0x00007f76504ea800 nid=0x925 waiting on condition [0x00007f761fffe000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d9948930> (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 org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)

    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)

    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"ContainerBackgroundProcessor[StandardEngine[Catalina]]" #22 daemon prio=5 os_prio=0 tid=0x00007f76504d4000 nid=0x924 waiting on condition [0x00007f764029e000]

   java.lang.Thread.State: TIMED_WAITING (sleeping)

    at java.lang.Thread.sleep(Native Method)

    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1361)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"Druid-ConnectionPool-Destroy-1062791125" #21 daemon prio=5 os_prio=0 tid=0x00007f7650da5800 nid=0x921 waiting on condition [0x00007f762cb8f000]

   java.lang.Thread.State: TIMED_WAITING (sleeping)

    at java.lang.Thread.sleep(Native Method)

    at com.alibaba.druid.pool.DruidDataSource$DestroyConnectionThread.run(DruidDataSource.java:2181)

   Locked ownable synchronizers:

    - None

"Druid-ConnectionPool-Create-1062791125" #20 daemon prio=5 os_prio=0 tid=0x00007f7650da5000 nid=0x920 waiting on condition [0x00007f762cc90000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d8f5d648> (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 com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2088)

   Locked ownable synchronizers:

    - None

"Abandoned connection cleanup thread" #19 daemon prio=5 os_prio=0 tid=0x00007f7650b1d800 nid=0x91f in Object.wait() [0x00007f762cf91000]

   java.lang.Thread.State: TIMED_WAITING (on object monitor)

    at java.lang.Object.wait(Native Method)

    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)

    - locked <0x00000000d8f5d7d8> (a java.lang.ref.ReferenceQueue$Lock)

    at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43)

   Locked ownable synchronizers:

    - None

"ZkClient-EventThread-16-172.28.1.111:2181,172.28.1.114:2181,172.28.1.113:2181" #16 daemon prio=5 os_prio=0 tid=0x00007f7650c7f000 nid=0x908 waiting on condition [0x00007f762d96d000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d8e29da8> (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 org.I0Itec.zkclient.ZkEventThread.run(ZkEventThread.java:67)

   Locked ownable synchronizers:

    - None

"NioBlockingSelector.BlockPoller-2" #14 daemon prio=5 os_prio=0 tid=0x00007f7650448800 nid=0x8fb runnable [0x00007f764059f000]

   java.lang.Thread.State: RUNNABLE

    at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)

    at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)

    at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)

    at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

    - locked <0x00000000d852a990> (a sun.nio.ch.Util$2)

    - locked <0x00000000d852a9a0> (a java.util.Collections$UnmodifiableSet)

    - locked <0x00000000d852a948> (a sun.nio.ch.EPollSelectorImpl)

    at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

    at org.apache.tomcat.util.net.NioBlockingSelector$BlockPoller.run(NioBlockingSelector.java:285)

   Locked ownable synchronizers:

    - None

"NioBlockingSelector.BlockPoller-1" #13 daemon prio=5 os_prio=0 tid=0x00007f765043a000 nid=0x8fa runnable [0x00007f76406a0000]

   java.lang.Thread.State: RUNNABLE

    at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)

    at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)

    at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)

    at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)

    - locked <0x00000000d852abc8> (a sun.nio.ch.Util$2)

    - locked <0x00000000d852abd8> (a java.util.Collections$UnmodifiableSet)

    - locked <0x00000000d852ab80> (a sun.nio.ch.EPollSelectorImpl)

    at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)

    at org.apache.tomcat.util.net.NioBlockingSelector$BlockPoller.run(NioBlockingSelector.java:285)

   Locked ownable synchronizers:

    - None

"GC Daemon" #12 daemon prio=2 os_prio=0 tid=0x00007f76503ab000 nid=0x8f9 in Object.wait() [0x00007f7640dfe000]

   java.lang.Thread.State: TIMED_WAITING (on object monitor)

    at java.lang.Object.wait(Native Method)

    - waiting on <0x00000000d852ad60> (a sun.misc.GC$LatencyLock)

    at sun.misc.GC$Daemon.run(GC.java:117)

    - locked <0x00000000d852ad60> (a sun.misc.GC$LatencyLock)

   Locked ownable synchronizers:

    - None

"pool-1-thread-1" #11 prio=5 os_prio=0 tid=0x00007f7650169000 nid=0x8f8 waiting on condition [0x00007f7654879000]

   java.lang.Thread.State: WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d835b188> (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:1067)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:

    - None

"AsyncFileHandlerWriter-1304836502" #10 daemon prio=5 os_prio=0 tid=0x00007f7650114000 nid=0x8f7 waiting on condition [0x00007f765497a000]

   java.lang.Thread.State: TIMED_WAITING (parking)

    at sun.misc.Unsafe.park(Native Method)

    - parking to wait for  <0x00000000d835b408> (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)

   Locked ownable synchronizers:

    - None

"Service Thread" #7 daemon prio=9 os_prio=0 tid=0x00007f76500bd000 nid=0x8f5 runnable [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:

    - None

"C1 CompilerThread1" #6 daemon prio=9 os_prio=0 tid=0x00007f76500af800 nid=0x8f4 waiting on condition [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:

    - None

"C2 CompilerThread0" #5 daemon prio=9 os_prio=0 tid=0x00007f76500ad800 nid=0x8f3 waiting on condition [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:

    - None

"Signal Dispatcher" #4 daemon prio=9 os_prio=0 tid=0x00007f76500ac000 nid=0x8f2 runnable [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

   Locked ownable synchronizers:

    - None

"Finalizer" #3 daemon prio=8 os_prio=0 tid=0x00007f7650074000 nid=0x8f1 in Object.wait() [0x00007f7654f82000]

   java.lang.Thread.State: WAITING (on object monitor)

    at java.lang.Object.wait(Native Method)

    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)

    - locked <0x00000000d835bd90> (a java.lang.ref.ReferenceQueue$Lock)

    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)

    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

   Locked ownable synchronizers:

    - None

"Reference Handler" #2 daemon prio=10 os_prio=0 tid=0x00007f7650072000 nid=0x8f0 in Object.wait() [0x00007f7655083000]

   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$ReferenceHandler.run(Reference.java:157)

    - locked <0x00000000d835bf48> (a java.lang.ref.Reference$Lock)

   Locked ownable synchronizers:

    - None

"main" #1 prio=5 os_prio=0 tid=0x00007f7650009000 nid=0x8ee runnable [0x00007f7656cfa000]

   java.lang.Thread.State: RUNNABLE

    at java.net.PlainSocketImpl.socketAccept(Native Method)

    at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)

    at java.net.ServerSocket.implAccept(ServerSocket.java:545)

    at java.net.ServerSocket.accept(ServerSocket.java:513)

    at org.apache.catalina.core.StandardServer.await(StandardServer.java:447)

    at org.apache.catalina.startup.Catalina.await(Catalina.java:745)

    at org.apache.catalina.startup.Catalina.start(Catalina.java:691)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke(Method.java:497)

    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)

    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495)

   Locked ownable synchronizers:

    - None

"VM Thread" os_prio=0 tid=0x00007f765006d000 nid=0x8ef runnable 

"VM Periodic Task Thread" os_prio=0 tid=0x00007f76500c0000 nid=0x8f6 waiting on condition 

JNI global references: 506
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292
  • 293
  • 294
  • 295
  • 296
  • 297
  • 298
  • 299
  • 300
  • 301
  • 302
  • 303
  • 304
  • 305
  • 306
  • 307
  • 308
  • 309
  • 310
  • 311
  • 312
  • 313
  • 314
  • 315
  • 316
  • 317
  • 318
  • 319
  • 320
  • 321
  • 322
  • 323
  • 324
  • 325
  • 326
  • 327
  • 328
  • 329
  • 330
  • 331
  • 332
  • 333
  • 334
  • 335
  • 336
  • 337
  • 338
  • 339
  • 340
  • 341
  • 342
  • 343
  • 344
  • 345
  • 346
  • 347
  • 348
  • 349
  • 350
  • 351
  • 352
  • 353
  • 354
  • 355
  • 356
  • 357
  • 358
  • 359
  • 360
  • 361
  • 362
  • 363
  • 364
  • 365
  • 366
  • 367
  • 368
  • 369
  • 370
  • 371
  • 372
  • 373
  • 374
  • 375
  • 376
  • 377
  • 378
  • 379
  • 380
  • 381
  • 382
  • 383
  • 384
  • 385
  • 386
  • 387
  • 388
  • 389
  • 390
  • 391
  • 392
  • 393
  • 394
  • 395
  • 396
  • 397
  • 398
  • 399
  • 400
  • 401
  • 402
  • 403
  • 404
  • 405
  • 406
  • 407
  • 408
  • 409
  • 410
  • 411
  • 412
  • 413
  • 414
  • 415
  • 416
  • 417
  • 418
  • 419
  • 420
  • 421
  • 422
  • 423
  • 424
  • 425
  • 426
  • 427
  • 428
  • 429
  • 430
  • 431
  • 432
  • 433
  • 434
  • 435
  • 436
  • 437
  • 438
  • 439
  • 440
  • 441
  • 442
  • 443
  • 444
  • 445
  • 446
  • 447
  • 448
  • 449
  • 450
  • 451
  • 452
  • 453
  • 454
  • 455
  • 456
  • 457
  • 458
  • 459
  • 460
  • 461
  • 462
  • 463
  • 464
  • 465
  • 466
  • 467
  • 468
  • 469
  • 470
  • 471
  • 472
  • 473
  • 474
  • 475
  • 476
  • 477
  • 478
  • 479
  • 480
  • 481
  • 482
  • 483
  • 484
  • 485
  • 486
  • 487
  • 488
  • 489
  • 490
  • 491
  • 492
  • 493
  • 494
  • 495
  • 496
  • 497
  • 498
  • 499
  • 500
  • 501
  • 502
  • 503
  • 504
  • 505
  • 506
  • 507
  • 508
  • 509
  • 510
  • 511
  • 512
  • 513
  • 514
  • 515
  • 516
  • 517
  • 518
  • 519
  • 520
  • 521
  • 522
  • 523
  • 524
  • 525
  • 526
  • 527
  • 528
  • 529
  • 530
  • 531
  • 532
  • 533
  • 534
  • 535
  • 536
  • 537
  • 538
  • 539
  • 540
  • 541
  • 542
  • 543
  • 544
  • 545
  • 546
  • 547
  • 548
  • 549
  • 550
  • 551
  • 552
  • 553
  • 554
  • 555
  • 556
  • 557
  • 558
  • 559
  • 560
  • 561
  • 562
  • 563
  • 564
  • 565
  • 566
  • 567
  • 568
  • 569
  • 570
  • 571
  • 572
  • 573
  • 574
  • 575
  • 576
  • 577
  • 578
  • 579
  • 580
  • 581
  • 582
  • 583
  • 584
  • 585
  • 586
  • 587
  • 588
  • 589
  • 590
  • 591
  • 592
  • 593
  • 594
  • 595
  • 596
  • 597
  • 598
  • 599
  • 600
  • 601
  • 602
  • 603
  • 604
  • 605
  • 606
  • 607
  • 608
  • 609
  • 610
  • 611
  • 612
  • 613
  • 614
  • 615
  • 616
  • 617
  • 618
  • 619
  • 620
  • 621
  • 622
  • 623
  • 624
  • 625
  • 626
  • 627
  • 628
  • 629
  • 630
  • 631
  • 632
  • 633
  • 634
  • 635
  • 636
  • 637
  • 638
  • 639
  • 640
  • 641
  • 642
  • 643
  • 644
  • 645
  • 646
  • 647
  • 648
  • 649
  • 650
  • 651
  • 652
  • 653
  • 654
  • 655
  • 656
  • 657
  • 658
  • 659
  • 660
  • 661
  • 662
  • 663
  • 664

java之Thread Dump分析的更多相关文章

  1. 性能分析之-- JAVA Thread Dump 分析综述

    性能分析之-- JAVA Thread Dump 分析综述       一.Thread Dump介绍 1.1什么是Thread Dump? Thread Dump是非常有用的诊断Java应用问题的工 ...

  2. 性能分析之– JAVA Thread Dump 分析

    最近在做性能测试,需要对线程堆栈进行分析,在网上收集了一些资料,学习完后,将相关知识整理在一起,输出文章如下. 一.Thread Dump介绍 1.1什么是Thread Dump? Thread Du ...

  3. (转)性能分析之-- JAVA Thread Dump 分析综述

    原文链接:http://blog.csdn.net/rachel_luo/article/details/8920596 最近在做性能测试,需要对线程堆栈进行分析,在网上收集了一些资料,学习完后,将相 ...

  4. 通过 thread dump 分析找到高CPU耗用与内存溢出的Java代码

    http://heylinux.com/archives/1085.html通过 thread dump 分析找到高CPU耗用与内存溢出的Java代码 首先,要感谢我的好朋友 钊花 的经验分享. 相信 ...

  5. tomcat thread dump 分析【转载】

    前言 Java Thread Dump 是一个非常有用的应用诊断工具, 通过thread dump出来的信息, 可以定位到你需要了解的线程, 以及这个线程的调用栈. 如果配合linux的top命令, ...

  6. java jvm heap dump及 thread dump分析

    一.概念: 在进行java应用故障分析时,经常需要分析内存和cpu信息,也就说所谓的heap dump 和 thread dump heap dump: heap dump文件是一个二进制文件,需要工 ...

  7. Java_tomcat thread dump 分析

    前言 Java Thread Dump 是一个非常有用的应用诊断工具, 通过thread dump出来的信息, 可以定位到你需要了解的线程, 以及这个线程的调用栈. 如果配合linux的top命令, ...

  8. tomcat thread dump 分析

    前言 Java Thread Dump 是一个非常有用的应用诊断工具, 通过thread dump出来的信息, 可以定位到你需要了解的线程, 以及这个线程的调用栈. 如果配合linux的top命令, ...

  9. java的Thread Dump诊断工具

    1.1什么是Thread Dump? Thread Dump是非常有用的诊断Java应用问题的工具.每一个Java虚拟机都有及时生成所有线程在某一点状态的thread-dump的能力,虽然各个 Jav ...

随机推荐

  1. julia应用于自动驾驶汽车、机器人、3D 打印、精准医疗、增强现实、基因组学、能源交易、机器学习、金融风控和太空任务设计等多个领域

    编程界的新宠 Julia 发布 1.0 正式版本,多种优势集于一身2018-08-14 14:14 公司Julia 的累积下载次数超过 200 万,已被应用于自动驾驶汽车.机器人.3D 打印.精准医疗 ...

  2. mac下源码安装redis

    转载:http://www.jianshu.com/p/6b5eca8d908b 下载安装包 redis-3.0.7.tar.gz 官网地址:http://redis.io/download 解压:t ...

  3. The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path:

    今天下载Windows安装版的tomcat5.5,安装完以后启动时候出现: The Apache Tomcat Native library which allows optimal performa ...

  4. Android-ImageView的属性android:scaleType作用

    在网上查了好多资料,大致都雷同,大家都是互相抄袭的,看着很费劲,不好理解,自己总结一下,留着需要看的话来查找. 代码中的例子如下: <ImageView android:id="@+i ...

  5. Sqlite-Sqlite3中的数据类型

    大多数的数据库引擎(到现在据我们所知的除了sqlite的每个sql数据库引擎)都使用静态的.刚性的类型,使用静态类型,数据的类型就由它的容器决定,这个容器是这个指被存放的特定列. Sqlite使用一个 ...

  6. sudo 添加

    sudo 添加 /etc/sudoers 找到root  ALL=(ALL)  ALL那一行, 复制之后,修改用户名:

  7. 云计算之路-阿里云上：启用Windows虚拟内存引发的CPU 100%故障

    今天上午11:35~11:40左右,由于负载均衡中的两台云服务器CPU占用突然飚至100%,造成网站5分钟左右不能正常访问,请大家带来了麻烦,请谅解! (上图中红色曲线表示CPU占用) 经过分析,我们 ...

  8. javascript脚本中使用json2.js解析json

    官方地址:https://github.com/douglascrockford/JSON-js   点击页面右下角“Download ZIP”下载   网页中引用json2.js,下面是一个简单的例 ...

  9. Java设计模式（十） 备忘录模式 状态模式

    (十九)备忘录模式 备忘录模式目的是保存一个对象的某个状态,在适当的时候恢复这个对象. class Memento{ private String value; public Memento(Stri ...

  10. hibernate 启动和辅助类实现资源的重复使用

    来自API: 1.2.5.  启动和辅助类 是时候来加载和储存一些Event对象了,但首先我们得编写一些基础的代码以完成设置.我们必须启动Hibernate,此过程包括创建一个全局的SessoinFa ...