Socket.io disconnect after long http request

[karProgrammer]

I use socket.io with express server, when I start an http request that take about 20 sec the connection is disconnected then reconnected again. How can I solve this problem?

[johnmanko]

Stackoverflow is a better place to ask support questions: https://stackoverflow.com/questions/tagged/socket.io

[lucid111]

同样的问题

[johnmanko]

同样的问题

"same question"

[hequanb]

I use nginx to load balance with ip_hash, and the request did goes to the right server with reverse-proxy.
however, some request will fail to get a response from socket.io server, and then they begin to reconnect.
And the error logs of nginx is 'upstream prematurely closed connection while reading response header from upstream',
same question.

[Nishchit14]

@karProgrammer Is it still happening?

You can test it in Firecamp, let me know if still facing the issue.

[roy2651]

is this solved?

[darrachequesne]

@karProgrammer what do you mean by:

when I start an http request that take about 20 sec

Is this a socket.emit()? Or a plain HTTP request to the Express part of your application?

[darrachequesne]

For future readers: you can increase the value of the pingTimeout option (defaults to 20s now).

I've added a note here: https://socket.io/docs/v4/troubleshooting-connection-issues/#you-are-trying-to-send-a-huge-payload