Openfire (Wildfire) Stops Accepting New Connections

There’s an issue with Openfire (formerly known as Wildfire – the open source Jabber-based IM server) and large amounts of users. The Openfire server stops accepting new connections when approximately 1000+ concurrent users are logged in. This issue seems to be caused by a maximum open file limit per process being hit. I figured out the following solution after a half day or so of researching and testing. This applies to Fedora Core 7 Linux, but should work with any Linux-based OS capable of running Openfire.

To permanently increase the maximum open file limits:

vi /etc/security/limits.conf

Append the following lines to the end of the file:

*                hard    nofile          64000
root             hard    nofile          64000
daemon           hard    nofile          64000

A reboot is required for these changes to take effect. I’m not sure of the issues this may cause with the OS, but so far I haven’t run into any.

Use at your own risk!

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