Comments (2)
ihipop
commented on July 28, 2024
from saber.
twose
commented on July 28, 2024
最近太忙了没有及时回复
这个地方所有人都存在严重的误解...认为连接断开客户端能立即侦测到并且重连, 这是不可能的, 网络波动或是连接断开可能发生在任意时刻, 底层keep_liveness只是一个基本的保障, 保证在由于连接悬挂时间过长的情况下(超过keep-alive指定时间), 下一次请求能够不失败(屏蔽连接的概念, 和curl一样只管请求就可以了), 这里你的请求频次过高, 可能触发了服务器端的保护机制, 总之连接断开了, 并且由于请求速度过快, 在客户端keep_liveness检测的时候, 操作系统内核并没有收到对端close连接的挥手, 导致keep_liveness检查仍是成功的, 然后在收包等待过程中, 内核才发现连接断开, 导致recv返回连接断开信息, 此时该次请求是在半途失败的, 底层不便于重新发起请求, 应由开发者自行决定是否重新请求, 所以开发者必须自己捕获这样的错误, 重新调用get方法, 此时底层会自动重连(屏蔽了连接的概念, 和curl一样, 会返回错误, 但不用关心连接), 然后就会发现可以继续请求了
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