[Question]: TCP设置KeepAlive不生效

[iqinlongfei]

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Questions with details

TCP Server设置了5秒的KeepAlive时间，gnet.WithTCPKeepAlive(5*time.Second),在压测时，Client与Server大概建立了8000+条TCP连接，Client在运行中crash掉了，但Server端并没有按照设置的KeepAlive断开连接。

看了一下源码，TCP_KEEPINTVL和TCP_KEEPIDLE设置了5s，TCP_KEEPCNT没有设置，系统设置的是9。所以总的断开时间应该是5 + 5*9 = 50s。也就是说50s后，server端会断开连接。

但我抓包看，server端并没有发送keepalive，而是每隔120s进行一次重传。

Code snippets (optional)

No response

[panjf2000]

你是说客户端挂了之后，连接还长时间存在？

还有，请新开一个 issue，选择 bug 类型，填写必要的信息。

[iqinlongfei]

是的，客户端挂掉后，server端还会保持这些连接很长时间，没有按照设置的Keepalive进行处理。