When clicking on a community page, liferay opens a download window instead of displaying portlet

Why liferay opens a download window instead of displaying portlet when you click on a particular page?

This problem occurs only when the page doesnt have any portlet or webcontent to display or the previous one is deleted/undeployed

try to add a portlet and access page, it works.

Debugging the dreaded "SEVERE: Error listenerStart" and "SEVERE: Error filterStart" tomcat error messages

Just a quick post that I hope might benefit others. If you have been developing web applications on tomcat for a while you have likely come the two error messages mentioned in the title.

SEVERE: Error listenerStart

Occurs when an exception is thrown in the contextInitialized method of a ServletContextListener

SEVERE: Error filterStart

Occurs when an exception is thrown in the init method of a Filter

Unfortunately by default, tomcat won't provide you with any details about the cause of the error. Infact it wont even tell you which filter or listener is failing. This can be big problem in applications of significant size that have many filters and listeners configured. Fortunately there is a solution. In your webapplication's WEB-INF/classes folder you can create a logging.properties file with the following contents

org.apache.catalina.core.ContainerBase.[Catalina].level = INFO
org.apache.catalina.core.ContainerBase.[Catalina].handlers = java.util.logging.ConsoleHandler

Now you will be presented with the stacktrace