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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
Reference: http://blog.trifork.com/2011/03/18/debugging-the-dreaded-severe-error-listenerstart-and-severe-error-filterstart-tomcat-error-messages/
