Used only internally.
An instance of {@link SessionCleanup} is constructed first,and then invoke {@link SessionCleanup#cleanup}.
It never throws an exception. @param sess the session that is being destroyed
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SessionsCtrl.updateCount(false); _invalidated = _invalid = true; final Configuration config = getWebApp().getConfiguration(); config.invokeSessionCleanups(this); cleanSessAttrs(); final Monitor monitor = config.getMonitor(); if (monitor != null) {