pinus mqtt心跳超时的解决 #137
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pinus mqtt心跳超时的解决 #137
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mqtt的心跳检测在pingreq之后，在windows操作系统的某些极端情况下由于异步的原因，会立刻收到pong，导致ping的时间竟然在pong之后，此时checkAlive函数还在等待pong消息，但此时已经收到返回了，所以一直都等不到，所以会超时。解决方法就是在ping之后第一次检测超时的时候补发一次ping，但不更新时间，此时就会收到新的pong消息，不会让进程被移除