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I was very happy when I noticed new 2.0 version because this chat modul has very friendly UI and looks exactly to fits my needs (flag friend integration and sound notification when a new message arrive). I have installed 2.0-beta2 version, and configured all settings.
Unfortunately after few cache clears site goes down with MySQL database connection error: "Too many connections". Issue is repeating every 5-10 minutes. Ajax pulling method did not work at all. When chat modul is disabled, everything is fine (site is alive all the time).