jstack命令(Java Stack Trace)
jstack用于打印出给定的java进程ID或core file或远程调试服务的Java堆栈信息，如果是在64位机器上，需要指定选项"-J-d64"，Windows的jstack使用方式只支持以下的这种方式。
例如说，通过：
ps ax | grep java
找到java的进程ID
jstack 81216
堆栈信息：
2015-05-31 16:50:43 Full thread dump Java HotSpot(TM) 64-Bit Server VM (24.71-b01 mixed mode): "Attach Listener" daemon prio=5 tid=0x00007fbce48bb000 nid=0x330b waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE Locked ownable synchronizers: - None "jd-group_adeMacBook-Pro.local-1433061921875-d313f048_watcher_executor" prio=5 tid=0x00007fbce528e800 nid=0x5903 waiting on condition [0x0000000118d05000] java.lang.Thread.State: TIMED_WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000007d7610080> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2176) at kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener$$anon$1.run(ZookeeperConsumerConnector.scala:544) Locked ownable synchronizers: - None "kafka-consumer-scheduler-0" daemon prio=5 tid=0x00007fbce52ea000 nid=0x5703 waiting on condition [0x0000000118c02000] java.lang.Thread.State: TIMED_WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000007d7600440> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2082) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1090) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:807) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Locked ownable synchronizers: - None "main-EventThread" daemon prio=5 tid=0x00007fbce52e4800 nid=0x5503 waiting on condition [0x0000000118aff000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000007d7608408> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:494) Locked ownable synchronizers: - None "main-SendThread(127.0.0.1:2181)" daemon prio=5 tid=0x00007fbce536e000 nid=0x5303 runnable [0x00000001189fc000] java.lang.Thread.State: RUNNABLE at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method) at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:200) at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:103) at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87) - locked <0x00000007d76101d0> (a sun.nio.ch.Util$2) - locked <0x00000007d76101e0> (a java.util.Collections$UnmodifiableSet) - locked <0x00000007d7610180> (a sun.nio.ch.KQueueSelectorImpl) at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98) at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:349) at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081) Locked ownable synchronizers: - None "ZkClient-EventThread-12-127.0.0.1:2181" daemon prio=5 tid=0x00007fbce52e3800 nid=0x5207 waiting on condition [0x00000001188f9000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000007d7608500> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at org.I0Itec.zkclient.ZkEventThread.run(ZkEventThread.java:67) Locked ownable synchronizers: - None "metrics-meter-tick-thread-2" daemon prio=5 tid=0x00007fbce5373000 nid=0x4b03 waiting on condition [0x00000001187f1000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000007d76085f0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1085) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:807) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Locked ownable synchronizers: - None "metrics-meter-tick-thread-1" daemon prio=5 tid=0x00007fbce539a000 nid=0x4903 waiting on condition [0x00000001186ee000] java.lang.Thread.State: TIMED_WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000007d76085f0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2082) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1090) at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:807) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Locked ownable synchronizers: - None "Service Thread" daemon prio=5 tid=0x00007fbce4022800 nid=0x4503 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE Locked ownable synchronizers: - None "C2 CompilerThread1" daemon prio=5 tid=0x00007fbce4021800 nid=0x4303 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE Locked ownable synchronizers: - None "C2 CompilerThread0" daemon prio=5 tid=0x00007fbce503b000 nid=0x4103 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE Locked ownable synchronizers: - None "Signal Dispatcher" daemon prio=5 tid=0x00007fbce5035000 nid=0x3413 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE Locked ownable synchronizers: - None "Finalizer" daemon prio=5 tid=0x00007fbce5032800 nid=0x2d03 in Object.wait() [0x0000000116146000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d7618ca0> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135) - locked <0x00000007d7618ca0> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209) Locked ownable synchronizers: - None "Reference Handler" daemon prio=5 tid=0x00007fbce5031800 nid=0x2b03 in Object.wait() [0x0000000116043000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x00000007d76189c8> (a java.lang.ref.Reference$Lock) at java.lang.Object.wait(Object.java:503) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133) - locked <0x00000007d76189c8> (a java.lang.ref.Reference$Lock) Locked ownable synchronizers: - None "main" prio=5 tid=0x00007fbce5801000 nid=0x1303 waiting on condition [0x000000010c900000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000007d760c9e8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043) at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) at kafka.consumer.ConsumerIterator.makeNext(ConsumerIterator.scala:63) at kafka.consumer.ConsumerIterator.makeNext(ConsumerIterator.scala:33) at kafka.utils.IteratorTemplate.maybeComputeNext(IteratorTemplate.scala:66) at kafka.utils.IteratorTemplate.hasNext(IteratorTemplate.scala:58) at KafkaConsumer.consume(KafkaConsumer.java:48) at KafkaConsumer.main(KafkaConsumer.java:53) Locked ownable synchronizers: - None "VM Thread" prio=5 tid=0x00007fbce502f000 nid=0x2903 runnable "GC task thread#0 (ParallelGC)" prio=5 tid=0x00007fbce5001800 nid=0x2103 runnable "GC task thread#1 (ParallelGC)" prio=5 tid=0x00007fbce5002000 nid=0x2303 runnable "GC task thread#2 (ParallelGC)" prio=5 tid=0x00007fbce5002800 nid=0x2503 runnable "GC task thread#3 (ParallelGC)" prio=5 tid=0x00007fbce4806000 nid=0x2703 runnable "VM Periodic Task Thread" prio=5 tid=0x00007fbce401e800 nid=0x4703 waiting on condition JNI global references: 149
相关说明：
1.命令格式
jstack [ option ] pid
jstack [ option ] executable core
jstack [ option ] [server-id@]remote-hostname-or-IP
2、常用参数说明
1）options：
executable Java executable from which the core dump was produced.
(可能是产生core dump的java可执行程序)
core 将被打印信息的core dump文件
remote-hostname-or-IP 远程debug服务的主机名或ip
server-id 唯一id,假如一台主机上多个远程debug服务
2）基本参数：
-F当’jstack [-l] pid’没有相应的时候强制打印栈信息
-l长列表. 打印关于锁的附加信息,例如属于java.util.concurrent的ownable synchronizers列表.
-m打印java和native c/c++框架的所有栈信息.
-h | -help打印帮助信息
pid 需要被打印配置信息的java进程id,可以用jps查询.
有篇分析的文章写得特别的好，忍不住分享了：
http://jameswxx.iteye.com/blog/1041173