Netty堆外内存泄露排查盛宴 -



Netty堆外内存泄露排查盛宴 -

最近在做一个基于 Websocket 的长连中间件,服务端使用实现了 Socket.IO 协议(基于WebSocket协议,提供长轮询降级能力) 的 netty-socketio 框架,该框架为 Netty 实现,鉴于本人对 Netty 比较熟,并且对比同样实现了 Socket.IO 协议的其他框架,Netty 的口碑都要更好一些,因此选择这个框架作为底层核心。

诚然,任何开源框架都避免不了 Bug 的存在,我们在使用这个开源框架时,就遇到一个堆外内存泄露的 Bug。美团的价值观一直都是"追求卓越",所以我们就想挑战一下,找到那只臭虫(Bug),而本文就是遇到的问题以及排查的过程。当然,想看结论的同学可以直接跳到最后,阅读总结即可。


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