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I´m doing a stress test and realized that SFS stop receiving new connections at 3541 exactly.

I´m using a Flash client connecting Users (3 different access point) and sending public message.

When the Admin shows 3541 users and sockets, it stop recieving new users.

In LOG I found:

INFO | jvm 1 | 2019/03/06 15:31:18 | 15:31:17.971 - [ WARNING ] > error during accept(): java.io.IOException: Too many open files

Any help?

Probably a file descriptor limit issue. Check that you used ulimit as described in the docs.

Also see this topic for further gotchas.

frcol wrote: Any help?

What Rob said is correct
You need to configure your OS to allow more file descriptors (which is the resource in Unix/Linux used for open files and sockets)

cheers