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  1. interviewGuide

    Java后端面试题精选，包括Java基础、JVM、数据库、mysql、redis、计算机网络、算法、数据结构、操作系统、设计模式、系统设计、框架原理（做开源不容易，希望给我一个Star，也便于更新时获得通知，谢谢！） http://notfound9.github.io/interviewGuide/

    Java 1.1k 219

  2. Leaf

    Forked from Meituan-Dianping/Leaf

    Leaf项目改进计划——主要是针对美团的分布式ID生成框架Leaf原项目中的一些issue体现出来的问题，对Leaf项目进行功能增强，问题修复及优化改进。介绍文章：https://juejin.im/post/5eaea4f4f265da7b991c4c31

    Java 5 1

  3. awesome-tips/iOS-Tips

    iOS知识小集

    CSS 3.2k 435

  4. Graver

    Forked from Nicholas86/Graver

    给美团的Graver框架提PR的项目，PR地址这里https://github.com/Meituan-Dianping/Graver/pull/20

    Objective-C 1

78 contributions in the last year

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May 2020

Created an issue in Meituan-Dianping/Leaf that received 4 comments

时间差过大，超过41位溢出，导致生成的id负数的问题

因为Leaf框架是沿用snowflake的位数分配， 最大41位时间差+10位的workID+12位序列化，但是由于snowflake是强制要求第一位为符号位0，否则生成的id转换为十进制后会是复试，但是Leaf项目中没有对时间差进行校验，当时间戳过大或者自定义的twepoch设置不当过小，…

4 comments

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