Communications link failure, database, preferences values, portlet, portlet.xml, mysql, portlet solution, liferay issue

Rishi Dev Gupta	:	I have read almost all the posts but could not find the permanent fix for the issue
		I am still getting
		I am using LFR 5.2.3 with mysql mysql 5.0 on tomcat 6.0.18
		If any one of you any solution, please respond.
Mazhar Anwar	:	Can you verify database(portletPreferences table) for all preferences values for your portlet?
		It seems you have missed <preferences> in your portlet.xml.
		Regards, Mazhar
Rishi Dev Gupta	:	This is not regarding any particular portlet. The tomcat just stops rendering the pages and the site goes down although the tomcat is running is background and there is no major load on mysql.
Rishi Dev Gupta	:	check this out for solution
		http://issues.liferay.com/browse/LPS-4578