JVM运行时诊断工具 HouseMD

Transcript

1. H ouse
   .M.D
   

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2. 聚石@taobao.com
   https://github.com/zhongl
   

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3. 他是一位 诊断 技艺精湛的医生
   

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4. 话说 诊断 技艺精湛的
   程序员会是...
   

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5. System.out.println("debugging");
   

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6. LOG.debug("debugging");
   

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7. 信息打印总不全有木有?
   又要改代码 > 编译 > 部署, 有木有?
   多来几次想屎的心有木有?
   

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8. 工欲善其事，必先利其器
   

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9. BTrace
   神器降临, 一秒钟变高富帅!
   

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10. Invocation Interception
    Profile
    JStack
    Context
    DTrace
    JMap
    JInfo
    Histogram
    Memory
    File
    Socket
    

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11. 甜蜜中略带苦涩, 幸福中稍显忧伤
    

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12. https://gist.github.com/zhongl/5625338
    ClassNotFoundException
    

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13. https://gist.github.com/zhongl/5625366
    StackOverflowError
    

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14. 不用IDE写脚本很苦逼, 有木有?
    总是要调整几次脚本才见效, 有木有?
    多来几次尿都憋不住了, 有木有?
    

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15. HouseMD
    交互式命令行
    

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16. $ housemd
    INFO : Welcome to HouseMD 0.2.4
    INFO : connection established on 54321
    housemd> _
    

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17. `trace TraceTarget.addOne`
    

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18. `trace TraceTarget$C+`
    trace sub class
    

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19. `trace -d TraceTarget$C+`
    get args and return
    

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20. `trace -s TraceTarget$C+`
    get invocation StackTrace
    

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21. Demo
    

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22. http://github.com/csug/housemd
    

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23. Tips & Traps
    

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24. limit < 100
    timeout < 3
    `trace` with `-l -t`
    

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25. trace unknown sub class instance
    `trace` with `Xxx+`
    

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26. SimpleName conflict
    `trace` with `-p com.xxx`
    

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27. INFO: Ended by error
    `last` for error ending
    

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28. class loaded by who from where
    `loaded` for class info
    

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29. port conflict
    `housemd -p `
    

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30. Emacs edit mode, power by jline2
    `Ctrl + r` for history search
    

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31. Backspace do not work
    Linux mode in SecureCRT
    

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32. chmod +w /tmp
    No echo cause by privilege
    

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33. housemd -h
    > help [command]
    test cases
    issues
    More help !!!
    

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34. https://github.com/CSUG/HouseMD/wiki/DevGuideCN
    Contribute to HouseMD
    

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35. Intro CSUG
    

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36. Thanks
    

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37. Scala In HouseMD
    TODO
    

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