I am using rendered attribute like rendered="#{(column[0].class.name == 'java.lang.String')}". It was working fine with my wildfly server. I have switched to tomcat and using class.name == is creating problems with tomcat. I use class.name == to conditionally check for my internal classes inside the value attribute of <h:outputText> as well but till the time this line is being used in the code the page would go blank and as soon as this line is removed the page would load fine. Is there a way to handle this in a different way so that the existing code works fine with minor manipulations and why does tomcat create this problem?