Online troubleshooting tool Arthas

Official Documents

Download Arthas-boot.jar , and then use the Java -jar start way:

  
  

   
   

    
    

     
     

     
     

      
      

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

     
     

     
     

      
      

       
       java -jar arthas-boot.jar
      
      
    
    
   
   
  
  

• The program requires the user to perform the target process and have the same rights. For example, with adminthe user to perform:  or  .sudo su admin && java -jar arthas-boot.jarsudo -u admin -EH java -jar arthas-boot.jar
• If you do not attach the target process, you can view ~/logs/arthas/ the log directory.
• If the download speed is slower, you can use aliyun mirroring:java -jar arthas-boot.jar --repo-mirror aliyun --use-http
• java -jar arthas-boot.jar -h Print more parameter information.

View high cpu usage of the three threads similar top -H, but can see the stack information, without having to first find and then find the thread id thread stack from jstack

thread -n 3

A method of tracking the number of call time [display]

trace package name. class name method name [-n number]

Performing the method for acquiring parameters Parameters first few} {-n 1 then acquires the data output only a]

   
   

    
    
# $ Watch package name. Class name method name params [0] .get (0) .age -n 1
   
   
The implementation of the system environment variables
  
  

   
   
#sysprop and sysenv 
# You can view all system variables sysprop, you can also set up a system variable. 
# Similarly, you can view all of the operating system environment variables by sysenv, you can also view set an environment variable.
  
  
jvm
  
  

   
   
# Direct output current by a variety of information jvm jvm command.