main主线程和自定义线程（Thread），自定义线程包括new Thread(Runnable target)和继承Thread
daemon
当所有非daemon线程运行结束，则jvm会强制结束，不管此时daemon是否还在执行。
main主线程是非daemon，
线程状态
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New（新生）
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Runnable（可运行）：包含操作系统中的
就绪和运行中 -
Blocked（被阻塞）：等待获取锁（waiting for monitor entry）
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4"RMI TCP Connection(64896)-172.16.52.118" daemon prio=10 tid=0x00000000405a6000 nid=0x68fe waiting for monitor entry [0x00007f2be65a3000] java.lang.Thread.State: BLOCKED (on object monitor) at com.xyz.goods.service.impl.GoodsServiceImpl.findChanellGoodsCountWithCache(GoodsServiceImpl.java:1734) - waiting to lock <0x00000000fe7e3b50> (a java.lang.String) -
Waiting（等待）：等待某个条件发生（waiting on condition）
线程池等待任务
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14"http-nio-8080-exec-1" #163 daemon prio=5 os_prio=0 tid=0x00007f13dc7aa800 nid=0x6b96 waiting on condition [0x00007f13d37f8000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000000ead46238> (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:1074) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)线程池等待任务（多余minSpareThreads的线程）
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14"http-nio-8080-exec-6" #107 daemon prio=5 os_prio=0 tid=0x00007fec3802d000 nid=0x62e0 waiting on condition [0x00007febcd503000] java.lang.Thread.State: TIMED_WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000000869935f8> (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 org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:85) at org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:31) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)sleep
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5"Dubbo-Holder" #20 prio=5 os_prio=0 tid=0x00007fccc098d000 nid=0x6452 waiting on condition [0x00007fcc87efd000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at io.dubbo.springboot.DubboHolderListener$1.run(DubboHolderListener.java:28) at java.lang.Thread.run(Thread.java:748)等待队列数据
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4"RMI TCP Connection(idle)" daemon prio=10 tid=0x00007fd50834e800 nid=0x56b2 waiting on condition [0x00007fd4f1a59000] java.lang.Thread.State: TIMED_WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00000000acd84de8> (a java.util.concurrent.SynchronousQueue$TransferStack)同步块中调用wait（in Object.wait()）
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4"RMI RenewClean-[172.16.50.182:4888]" daemon prio=10 tid=0x0000000040d2c800 nid=0x97e in Object.wait() [0x00007f9ccafd0000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on <0x0000000799b032d8> (a java.lang.ref.ReferenceQueue$Lock) -
Timed waiting（计时等待）：跟Waiting类似，只是计时等待
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Terminated（被终止）