Connection reset by peer problem analysis

Possible error reasons:

(1) The number of concurrent connections of the server exceeds its capacity, and the server will Down some of the connections;

(2) The client closes the browser, but the server is still sending data to the client;

(3) The browser side pressed Stop

(4) The machine has a network proxy (the problem I encountered)

Answer found online:

Broken pipe error ultimate explanation: https://www.cnblogs.com/metoy/p/6565486.html

My general understanding of this error is:

If the length of the data agreed in advance between the sender and the receiver is inconsistent, the receiver is notified that the length of the data to be received is less than the length of the data actually sent by the sender.

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Originally, I wanted to go to the customer environment for various analysis.The result is the problem caused by the customer opening the vpn.