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Tuning linux client device to support more than 1024 client [message #1848908]

Thu, 23 December 2021 06:31

Ria Thomas

Messages: 2
Registered: December 2021

Junior Member

Hi All,

I am trying to run more than 2000 clients in single linux machine using paho client library. When the clients count reaches 1024 ie that many sockets get opened , paho client is not allowing any more connections. How to get past this limitation ?

if (mod_s.clientsds->count >= FD_SETSIZE)
{
Log(LOG_ERROR, -1, "addSocket: exceeded FD_SETSIZE %d", FD_SETSIZE);
rc = SOCKET_ERROR;
}

System: Ubuntu 16.04
Number of open sockets available in the machine is more than 100000.
MQTT broker running on the same machine is allowing more than 1024 sockets to be opened.

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