bug定位总结

bug定位基本流程:

bug定位核心方法:

  1. http抓包:  先确认http请求是否被发送
    1. App: Fiddler, charles, 云代理,
    2. 浏览器: 开发者工具, firebug等

    抓包的时候要注意依次辨别domain, path和请求参数的值,是否正确

  2. 查看日志:
    1. 应用运行日志: logs/appname/error.log, exception.log
    2. 应用启动日志: usr/local/tomcat|dubbo|jar/springboot/logs/目录下
    3. 查看实时日志: tail -f *.log
    4. 根据关键字搜索日志: grep key *.log

前端常见问题:

  1. 功能bug
  2. web: js缓存没有更新
  3. ajax请求参数拼装错误
  4. 等等

cap常见问题:

  1. URL格式非法: 返回http 400
  2. Api在缓存在不存在http 405
  3. Ip限制加入黑名单: cap 140
  4. 系统参数校验失败: cap 101
  5. 熔断: cap 154

所有的cap错误类型, 请参考错误码 或者 ErrorCodeEnum.java

dubbo接口排查:

  1. 从dubbo admin中查看应用和接口是否有提供者和消费者
  2. 核对调用方与dubbo提供方的dubbo接口版本是否一致

后台模块常见问题原因:

  1. 部署错误的代码分支
  2. 应用没有被启动, 或者启动报错了
  3. cdiamond新配置没有添加,或者值错误
  4. 服务器etc/caocao/app/config.properties配置值错误或者遗漏
  5. 数据库变更脚本没有执行
  6. kafka topic没有被添加
  7. 等等

终极定位bug方法:

  1. 了解系统架构, 系统架构图: 整体系统架构
  2. 代码调试: 本地调试(客户端,服务端),远程调试

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