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Add desig file
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hekuangsheng committed Sep 2, 2021
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4 changes: 3 additions & 1 deletion meituan-backend/meituan-backend-pdf_abstract.md
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## [JVM源码](http://hg.openjdk.java.net/jdk8u)

## 2018
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### [可用性理解](https://tech.meituan.com/2018/04/19/trade-high-availability-in-action.html)

### netty堆外内存泄漏(netty-socketio)
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1. 一次 Connect 和 Disconnect 为一次连接的建立与关闭
2. 在 Disconnect事件前后申请的内存并没有释放(DIRECT_MEMORY_COUNTER堆外统计字段)
3. 断点打在client.send() 这行, 然后关闭客户端连接,之后直接进入到这个方法,有个逻辑 encoder.allocateBuffer申请堆外内存
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