Server sends an "RST" to the Client

[zhartov]

Hello everyone,

I have 3 clients and servers running on cohttp-eio locally on my machine, all the three servers are bound to different ports. All the clients and servers run on different domains.

My workflow looks like this - I run a client and server together in one program, similarly I have two more programs which all communicate with each other. Ideally, the first program prints out a terminate when all communications with the other two have finished correctly.

The issue is that sometimes, the communications ie a POST or a response from one of the clients doesn't get through which causes all the programs to stop execution. Tried to use Wireshark to see what the issue was and figured out that the server was sending an "RST" to the client in some of the traces. In other traces, there's a series of FIN,ACKs after which the communication stops.

Any help would be appreciated
Thanks

[zhartov]

Turns out the program was creating too many open file handlers from opening a ton of connections. Linux did not print out the error message but running it on a Mac did. For now, we just increased the limit on the number of open file handlers.