1.启动Arthas

cd /Users/liyabin/.arthas/lib/3.6.2/arthas

/Library/Java/JavaVirtualMachines/jdk1.8.0_333.jdk/Contents/Home/bin/java -jar arthas-boot.jar 

注意：java命令必须为jdk安装目录bin下的，非jre下，否则会启动失败“IllegalArgumentException: Can not find tools.jar ”

再次启动会报错

[ERROR] The telnet port 3658 is used by process 31886 instead of target process 31885, you will connect to an unexpected process.
[ERROR] 1. Try to restart arthas-boot, select process 31886, shutdown it first with running the 'stop' command.
[ERROR] 2. Or try to stop the existing arthas instance: java -jar arthas-client.jar 127.0.0.1 3658 -c "stop"
[ERROR] 3. Or try to use different telnet port, for example: java -jar arthas-boot.jar --telnet-port 9998 --http-port -1

解决方案关闭之前的session

 2.面板查看dashboard

dashboard

退出：按q键或command+c

 2.清屏命令cls

cls

3.查看线程命令：thread

https://arthas.aliyun.com/doc/thread.html

3.1 展示第一页的线程信息

thread

 3.2 展示所有的线程信息

thread --all

  3.3 展示阻塞线程

thread -b

 3.4 根据线程状态筛选线程

thread --state TIMED_WAITING 
状态类型：NEW, RUNNABLE, TIMED_WAITING, WAITING, BLOCKED,TERMINATED

 3.5 查看最忙的n个线程

thread -n 3

 3.6查看某个线程执行代码明细

thread 46