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 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

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