Alibaba Arthas

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文档地址[https://alibaba.github.io/arthas/advanced-use.html]


$ curl -O https://alibaba.github.io/arthas/arthas-boot.jar

#Demo进程是第2个，则输入2，再输入回车/enter。Arthas会attach到目标进程上，并输出日志
$ java -jar arthas-boot.jar
* [1]: 35542
  [2]: 71560 arthas-demo.jar
  
[INFO] Try to attach process 71560
[INFO] Attach process 71560 success.
[INFO] arthas-client connect 127.0.0.1 3658
  ,---.  ,------. ,--------.,--.  ,--.  ,---.   ,---.
 /  O  \ |  .--. ''--.  .--'|  '--'  | /  O  \ '   .-'
|  .-.  ||  '--'.'   |  |   |  .--.  ||  .-.  |`.  `-.
|  | |  ||  |\  \    |  |   |  |  |  ||  | |  |.-'    |
`--' `--'`--' '--'   `--'   `--'  `--'`--' `--'`-----'
 
wiki: https://alibaba.github.io/arthas
version: 3.0.5.20181127201536
pid: 71560
time: 2018-11-28 19:16:24


#当前系统的实时数据面板
$ dashboard  
 
#arthas-demo进程的Main Class 
$ thread 1 | grep 'main('   
    at demo.MathGame.main(MathGame.java:17)

#反编译python
$  jad demo.MathGame  
 
#通过watch命令来查看demo.MathGame#primeFactors函数的返回值 
$ watch demo.MathGame primeFactors returnObj  
 
 
#返回当前的工作目录，和linux命令类似 
$ pwd
 /data/alpha-market/jars
 
#查看当前会话的信息 
$ session
  Name        Value                                                                                                                                                                        
--------------------------------------------------                                                                                                                                        
 JAVA_PID    7276                                                                                                                                                                         
 SESSION_ID  8af7f372-0c5d-4d6a-972b-33840aa6d2fb
 
# 打印命令历史
 $ history
    1  dashboard
    2  dashboard
    3  thread 1 | grep 'main('
    4  jad demo.MathGame
    5  watch demo.MathGame primeFactors returnObj
    6  jvm
 
#关闭 Arthas 服务端，所有 Arthas 客户端全部退出
$ stop
 

#查看当前 JVM 的线程堆栈信息
$ thread
 Threads Total: 90, NEW: 0, RUNNABLE: 21, BLOCKED: 0, WAITING: 44, TIMED_WAITING: 25, TERMINATED: 0                                                                                        
ID              NAME                                          GROUP                          PRIORITY        STATE          %CPU            TIME           INTERRUPTED     DAEMON         
75              Thread-2                                      main                           5               RUNNABLE       29              4:12           false           false          
1511            as-command-execute-daemon                     system                         10              RUNNABLE       20              0:0            false           true           
82              SendDepth-pool-2                              main                           5               RUNNABLE       17              28:22          false           false          
79              Thread-4                                      main                           5               TIMED_WAITING  14              12:20          false           false          
1456            task-56                                       main                           5               TIMED_WAITING  4               0:1            false           false          
1453            task-53                                       main                           5               TIMED_WAITING  3               0:1            false           false          
1454            task-54                                       main                           5               TIMED_WAITING  3               0:1            false           fal
 
#查看当前 JVM 的信息
$ jvm

#通过getstatic命令可以方便的查看类的静态属性
$ getstatic  com.alpha.market.service.impl.QueryServiceImpl logger